feat(astf): Support framesizes for ASTF

- No support for IMIX.
+ Fix a bad bug in padding (most ASTF profiles had wrong frame sizes).
+ Fix a big typo in TCP PPS profiles (s->c was not data, just RST).
+ Control transaction size via ASTF_N_DATA_FRAMES env variable.
 - Default value 5 leads to transactions smaller than before.
 + It ensures transaction is one burst (per direction) even for jumbo.
+ Edit autogen to set supported frame sizes based on suite id.
 + Both TCP and UDP use the same values:
  + 64B for CPS (exact for UDP, nominal for TCP).
  + 100B, 1518B and 9000B for TPUT and PPS.
   - TCP TPUT achievable minimum is 70B.
   + Used 100B to leave room for possible IPv6 ASTF tests.
 + Separate function for code reused by vpp and trex tests.
 - I do not really like the new "copy and edit" approach added here.
  + But it is a quick edit, better autogen refactor is low priority.
+ Consider both established and transitory sessions as valid.
 - Mostly for compatibility with 2202 behavior and to avoid ramp-ups.
 - Assuming both session states have similar enough VPP CPU overhead.
 + Added a TODO to investigate and maybe reconsider later.
+ Update the state timeout value to 240s.
 + That is the default for TCP (for transitory state).
 - UDP could keep using 300s.
  + But I prefer UDP and TCP to behave as similarly as possible.
+ Use TRex tunables to get the exact frame size (for data packets).
 - It is not clear why the recipe for MSS has to be this complicated.
 + Move code away from profile init, as frame size is not known there.
 + Change internal profile API, so values related to MSS are passed.
+ Lower ramp-up rate for TCP TPUT tests.
 + Because without lower rate, jumbo fails on packet loss in ramp-up.
 + UDP TPUT ramp-up rate also lowered (just to keep suites more similar).
+ Distinguish one-direction and aggregated average frame size.
 + Update keyword documentation where the distiction matters.
 + One-direction is needed for turning bandwidth limit to TPS limit.
 + Aggregated is needed for correct NDRPDR bandwidth result value.
 - TCP TPUT will always be few percent below bidirectional maximum.
  + That is unavoidable, as one direction sends more control packets.
+ Add runtime consistency checks so future refactors are safer.
 + Fail if padding requested would be negative.
 + Fail if suite claims unexpected values for packets per transaction.
+ Edit the 4 types of ASTF profiles to keep them similar to each other.
 + Move UDP TPUT limit value from a field back to direct argument.
 + Stop pretending first UDP packet is not data.
+ Apply small improvements where convenient.
 + Replace "aggregate" with "aggregated" where possible.
  + To lower probability of any future typos in variable names.
 + Avoid calling Set Numeric Frame Sizes twice.
 + Code formatting, keyword documentation, code comments, ...
 + Add TODOs for less important code quality improvements.
- Postpone updating of methodology pages to a subsequent change.

Change-Id: I4b381e5210e69669f972326202fdcc5a2c9c923b
Signed-off-by: Vratko Polak <vrpolak@cisco.com>

21 files changed, 617 insertions, 640 deletions

diff --git a/GPL/traffic_profiles/trex/profile_trex_astf_base_class.py b/GPL/traffic_profiles/trex/profile_trex_astf_base_class.py
index e36e52c2c1..cb8fd763e6 100644
--- a/GPL/traffic_profiles/trex/profile_trex_astf_base_class.py
+++ b/GPL/traffic_profiles/trex/profile_trex_astf_base_class.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -46,13 +46,9 @@ class TrafficProfileBaseClass:
         ]
     }
 
-    def __init__(self):
-        # Default values of required parameters; can be overwritten in
-        # "get_profile" method.
-        self.framesize = 64
-        self._pcap_dir = u""
-
-        # If needed, add your own parameters.
+    # TODO: Declare and document fields in a contructor to make pylint happier.
+    # TODO: Consider passing the values to define_profile(),
+    #       instead of keeping (and documenting) them as instance fields here.
 
     @property
     def pcap_dir(self):
@@ -72,7 +68,7 @@ class TrafficProfileBaseClass:
 
         :param current_length: Current length of the packet.
         :param required_length: Required length of the packet. If set to 0 then
-        self.framesize value is used.
+            self.framesize value is used.
         :type current_length: int
         :type required_length: int
         :returns: The generated padding.
@@ -82,20 +78,25 @@ class TrafficProfileBaseClass:
         #  use random.randrange(0, len(self.STREAM_TABLE[self.framesize])) ?
         if not required_length:
             required_length = self.framesize
-
-        return str(choices(ascii_letters, k=required_length - current_length))
+        missing = required_length - current_length
+        if missing < 0:
+            msg = f"Cannot to pad from {current_length} to {required_length}."
+            raise RuntimeError(msg)
+        padding = u"".join(choices(ascii_letters, k=missing))
+        return padding
 
     def define_profile(self):
         """Define profile to be used by T-Rex astf traffic generator.
 
         This method MUST return:
 
-            return ip_gen, templates, cap_list
+            return ip_gen, templates, kwargs
 
-            templates or cap_list CAN be None.
+            templates or kwargs CAN be None.
+            Kwargs can be used to define PCAP file, set MSS, ...
 
         :returns: IP generator and profile templates or list of pcap files for
-        traffic generator.
+            traffic generator.
         :rtype: tuple
         """
         raise NotImplementedError
@@ -108,15 +109,14 @@ class TrafficProfileBaseClass:
         :returns: Traffic profile.
         :rtype: trex.astf.trex_astf_profile.ASTFProfile
         """
-        ip_gen, templates, cap_list = self.define_profile()
-
-        # In most cases you will not have to change the code below:
+        ip_gen, templates, kwargs = self.define_profile()
+        if kwargs is None:
+            kwargs = dict()
 
-        # profile
         profile = ASTFProfile(
             default_ip_gen=ip_gen,
             templates=templates,
-            cap_list=cap_list
+            **kwargs
         )
 
         return profile
@@ -127,11 +127,13 @@ class TrafficProfileBaseClass:
         If needed, add your own parameters.
 
         :param kwargs: Key-value pairs used by "create_profile" method while
-        creating the profile.
+            creating the profile.
+        :type kwargs: dict
         :returns: Traffic profile.
         :rtype: trex.astf.trex_astf_profile.ASTFProfile
         """
         self.framesize = kwargs[u"framesize"]
+        self.n_data_frames = kwargs[u"n_data_frames"]
         self._pcap_dir = kwargs.get(
             u"pcap_dir", u"/opt/trex-core-2.88/scripts/avl"
         )
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-1024h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-1024h-pps.py
index 70fcaa06bb..546e11bb5e 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-1024h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-1024h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,22 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.3.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.3.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-        self.data_size = 11111
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -73,31 +57,44 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.3.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.3.255"
+
+        # Headers length, not sure why TRex needs 32B for segment header.
+        real_headers_size = 70  # 18B L2 + 20B IPv4 + 32B TCP.
+        trex_headers_size = real_headers_size - 12  # As if TCP header is 20B.
+        trex_mss = self.framesize - trex_headers_size
+        real_mss = trex_mss - 12  # TRex honors segment header+data limit.
+        data_size = self.n_data_frames * real_mss
+
         # client commands
         prog_c = ASTFProgram()
         prog_c.connect()
-        prog_c.send(u"1" * self.data_size)
-        prog_c.recv(self.data_size)
+        prog_c.send(u"1" * data_size)
+        prog_c.recv(data_size)
 
         # server commands
         prog_s = ASTFProgram()
         prog_s.accept()
-        prog_c.recv(self.data_size)
-        prog_c.send(u"1" * self.data_size)
+        prog_s.recv(data_size)
+        prog_s.send(u"1" * data_size)
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -108,12 +105,25 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=64512,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
 
-        return ip_gen, template, None
+        globinfo = ASTFGlobalInfo()
+        # Ensure correct data frame size.
+        globinfo.tcp.mss = trex_mss
+        # Ensure the whole transaction is a single burst (per direction).
+        globinfo.tcp.initwnd = self.n_data_frames
+        # Ensure buffers are large enough so starting window works.
+        globinfo.tcp.txbufsize = data_size
+        globinfo.tcp.rxbufsize = data_size
+        kwargs = dict(
+            default_c_glob_info=globinfo,
+            default_s_glob_info=globinfo,
+        )
+
+        return ip_gen, template, kwargs
 
 
 def register():
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-1024h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-1024h.py
index 2e4fca2af0..4c6a15ac7d 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-1024h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-1024h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,21 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.3.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.3.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -72,6 +57,14 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # No data, no way to manipulate frame sizes via MSS.
+
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.3.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.3.255"
+
         # client commands
         prog_c = ASTFProgram()
         # send syn
@@ -88,17 +81,17 @@ class TrafficProfile(TrafficProfileBaseClass):
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -109,7 +102,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=64512,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-16384h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-16384h-pps.py
index 19402bab95..565ccac3d5 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-16384h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-16384h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,22 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.63.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.63.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-        self.data_size = 11111
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -73,31 +57,44 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.63.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.63.255"
+
+        # Headers length, not sure why TRex needs 32B for segment header.
+        real_headers_size = 70  # 18B L2 + 20B IPv4 + 32B TCP.
+        trex_headers_size = real_headers_size - 12  # As if TCP header is 20B.
+        trex_mss = self.framesize - trex_headers_size
+        real_mss = trex_mss - 12  # TRex honors segment header+data limit.
+        data_size = self.n_data_frames * real_mss
+
         # client commands
         prog_c = ASTFProgram()
         prog_c.connect()
-        prog_c.send(u"1" * self.data_size)
-        prog_c.recv(self.data_size)
+        prog_c.send(u"1" * data_size)
+        prog_c.recv(data_size)
 
         # server commands
         prog_s = ASTFProgram()
         prog_s.accept()
-        prog_c.recv(self.data_size)
-        prog_c.send(u"1" * self.data_size)
+        prog_s.recv(data_size)
+        prog_s.send(u"1" * data_size)
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -108,12 +105,25 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=1032192,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
 
-        return ip_gen, template, None
+        globinfo = ASTFGlobalInfo()
+        # Ensure correct data frame size.
+        globinfo.tcp.mss = trex_mss
+        # Ensure the whole transaction is a single burst (per direction).
+        globinfo.tcp.initwnd = self.n_data_frames
+        # Ensure buffers are large enough so starting window works.
+        globinfo.tcp.txbufsize = data_size
+        globinfo.tcp.rxbufsize = data_size
+        kwargs = dict(
+            default_c_glob_info=globinfo,
+            default_s_glob_info=globinfo,
+        )
+
+        return ip_gen, template, kwargs
 
 
 def register():
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-16384h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-16384h.py
index 8f4d12ee6a..728ad5b0d9 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-16384h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-16384h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,21 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.63.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.63.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -72,6 +57,14 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # No data, no way to manipulate frame sizes via MSS.
+
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.63.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.63.255"
+
         # client commands
         prog_c = ASTFProgram()
         # send syn
@@ -88,17 +81,17 @@ class TrafficProfile(TrafficProfileBaseClass):
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -109,7 +102,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=1032192,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-262144h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-262144h-pps.py
index 2a174307ec..54b38a43a9 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-262144h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-262144h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,22 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"172.16.0.0"
-        self.p1_src_end_ip = u"172.19.255.255"
-        self.p1_dst_start_ip = u"20.16.0.0"
-        self.p1_dst_end_ip = u"20.19.255.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-        self.data_size = 11111
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -73,31 +57,44 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # IPs used in packet headers.
+        p1_src_start_ip = u"172.16.0.0"
+        p1_src_end_ip = u"172.19.255.255"
+        p1_dst_start_ip = u"20.16.0.0"
+        p1_dst_end_ip = u"20.19.255.255"
+
+        # Headers length, not sure why TRex needs 32B for segment header.
+        real_headers_size = 70  # 18B L2 + 20B IPv4 + 32B TCP.
+        trex_headers_size = real_headers_size - 12  # As if TCP header is 20B.
+        trex_mss = self.framesize - trex_headers_size
+        real_mss = trex_mss - 12  # TRex honors segment header+data limit.
+        data_size = self.n_data_frames * real_mss
+
         # client commands
         prog_c = ASTFProgram()
         prog_c.connect()
-        prog_c.send(u"1" * self.data_size)
-        prog_c.recv(self.data_size)
+        prog_c.send(u"1" * data_size)
+        prog_c.recv(data_size)
 
         # server commands
         prog_s = ASTFProgram()
         prog_s.accept()
-        prog_c.recv(self.data_size)
-        prog_c.send(u"1" * self.data_size)
+        prog_s.recv(data_size)
+        prog_s.send(u"1" * data_size)
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -108,12 +105,25 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=16515072,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
 
-        return ip_gen, template, None
+        globinfo = ASTFGlobalInfo()
+        # Ensure correct data frame size.
+        globinfo.tcp.mss = trex_mss
+        # Ensure the whole transaction is a single burst (per direction).
+        globinfo.tcp.initwnd = self.n_data_frames
+        # Ensure buffers are large enough so starting window works.
+        globinfo.tcp.txbufsize = data_size
+        globinfo.tcp.rxbufsize = data_size
+        kwargs = dict(
+            default_c_glob_info=globinfo,
+            default_s_glob_info=globinfo,
+        )
+
+        return ip_gen, template, kwargs
 
 
 def register():
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-262144h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-262144h.py
index 344bc7dcac..ec4870a95e 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-262144h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-262144h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,21 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"172.16.0.0"
-        self.p1_src_end_ip = u"172.19.255.255"
-        self.p1_dst_start_ip = u"20.16.0.0"
-        self.p1_dst_end_ip = u"20.19.255.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -72,6 +57,14 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # No data, no way to manipulate frame sizes via MSS.
+
+        # IPs used in packet headers.
+        p1_src_start_ip = u"172.16.0.0"
+        p1_src_end_ip = u"172.19.255.255"
+        p1_dst_start_ip = u"20.16.0.0"
+        p1_dst_end_ip = u"20.19.255.255"
+
         # client commands
         prog_c = ASTFProgram()
         # send syn
@@ -88,17 +81,17 @@ class TrafficProfile(TrafficProfileBaseClass):
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -109,7 +102,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=16515072,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-4096h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-4096h-pps.py
index 6999dee6f9..0108edbcd5 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-4096h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-4096h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,22 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.15.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.15.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-        self.data_size = 11111
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -73,31 +57,44 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.15.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.15.255"
+
+        # Headers length, not sure why TRex needs 32B for segment header.
+        real_headers_size = 70  # 18B L2 + 20B IPv4 + 32B TCP.
+        trex_headers_size = real_headers_size - 12  # As if TCP header is 20B.
+        trex_mss = self.framesize - trex_headers_size
+        real_mss = trex_mss - 12  # TRex honors segment header+data limit.
+        data_size = self.n_data_frames * real_mss
+
         # client commands
         prog_c = ASTFProgram()
         prog_c.connect()
-        prog_c.send(u"1" * self.data_size)
-        prog_c.recv(self.data_size)
+        prog_c.send(u"1" * data_size)
+        prog_c.recv(data_size)
 
         # server commands
         prog_s = ASTFProgram()
         prog_s.accept()
-        prog_c.recv(self.data_size)
-        prog_c.send(u"1" * self.data_size)
+        prog_s.recv(data_size)
+        prog_s.send(u"1" * data_size)
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -108,12 +105,25 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=258048,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
 
-        return ip_gen, template, None
+        globinfo = ASTFGlobalInfo()
+        # Ensure correct data frame size.
+        globinfo.tcp.mss = trex_mss
+        # Ensure the whole transaction is a single burst (per direction).
+        globinfo.tcp.initwnd = self.n_data_frames
+        # Ensure buffers are large enough so starting window works.
+        globinfo.tcp.txbufsize = data_size
+        globinfo.tcp.rxbufsize = data_size
+        kwargs = dict(
+            default_c_glob_info=globinfo,
+            default_s_glob_info=globinfo,
+        )
+
+        return ip_gen, template, kwargs
 
 
 def register():
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-4096h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-4096h.py
index 4278e3d099..6124baa6a1 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-4096h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-4096h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,21 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self, **kwargs):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.15.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.15.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -72,6 +57,14 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # No data, no way to manipulate frame sizes via MSS.
+
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.15.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.15.255"
+
         # client commands
         prog_c = ASTFProgram()
         # send syn
@@ -88,17 +81,17 @@ class TrafficProfile(TrafficProfileBaseClass):
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -109,7 +102,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=258048,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-65536h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-65536h-pps.py
index 6b3bbd4c9f..54de3e500d 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-65536h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-65536h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,22 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.255.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.255.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-        self.data_size = 11111
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -73,31 +57,44 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.255.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.255.255"
+
+        # Headers length, not sure why TRex needs 32B for segment header.
+        real_headers_size = 70  # 18B L2 + 20B IPv4 + 32B TCP.
+        trex_headers_size = real_headers_size - 12  # As if TCP header is 20B.
+        trex_mss = self.framesize - trex_headers_size
+        real_mss = trex_mss - 12  # TRex honors segment header+data limit.
+        data_size = self.n_data_frames * real_mss
+
         # client commands
         prog_c = ASTFProgram()
         prog_c.connect()
-        prog_c.send(u"1" * self.data_size)
-        prog_c.recv(self.data_size)
+        prog_c.send(u"1" * data_size)
+        prog_c.recv(data_size)
 
         # server commands
         prog_s = ASTFProgram()
         prog_s.accept()
-        prog_c.recv(self.data_size)
-        prog_c.send(u"1" * self.data_size)
+        prog_s.recv(data_size)
+        prog_s.send(u"1" * data_size)
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -108,12 +105,25 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=4128768,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
 
-        return ip_gen, template, None
+        globinfo = ASTFGlobalInfo()
+        # Ensure correct data frame size.
+        globinfo.tcp.mss = trex_mss
+        # Ensure the whole transaction is a single burst (per direction).
+        globinfo.tcp.initwnd = self.n_data_frames
+        # Ensure buffers are large enough so starting window works.
+        globinfo.tcp.txbufsize = data_size
+        globinfo.tcp.rxbufsize = data_size
+        kwargs = dict(
+            default_c_glob_info=globinfo,
+            default_s_glob_info=globinfo,
+        )
+
+        return ip_gen, template, kwargs
 
 
 def register():
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-65536h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-65536h.py
index 1be78d8c42..13c6ee8f38 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-65536h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4tcp-65536h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -47,21 +47,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.255.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.255.255"
-
-        # Headers length; not used in this profile, just for the record of
-        # header length for TCP packet with 0B payload
-        self.headers_size = 58  # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -72,6 +57,14 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
+        # No data, no way to manipulate frame sizes via MSS.
+
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.255.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.255.255"
+
         # client commands
         prog_c = ASTFProgram()
         # send syn
@@ -88,17 +81,17 @@ class TrafficProfile(TrafficProfileBaseClass):
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -109,7 +102,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=4128768,  # TODO: set via input parameter
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-1024h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-1024h-pps.py
index 667385ffbf..135e7fbdc7 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-1024h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-1024h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -46,84 +46,80 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self, **kwargs):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.3.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.3.255"
-
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B UDP
-
-        self.udp_data = u""
-
-        self.n_data = 32  # TODO: set via input parameter
-        self.m_delay = 2000000  # delay 2000s (2,000,000 ms)
-        self.u_delay = 1000 * self.m_delay  # delay 2000s (2,000,000,000 us)
-        self.limit = 64512
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
         This method MUST return:
 
-            return ip_gen, templates
+            return ip_gen, templates, None
 
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
-        if self.framesize == 64:
-            self.udp_data += self._gen_padding(self.headers_size, 72)
-        if self.framesize == 1518:
-            self.udp_data += self._gen_padding(self.headers_size, 1514)
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.3.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.3.255"
+
+        # The difference between data size and frame size.
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # TODO: Use the "connection protocol" from CPS traffic profile?
+        # Currently, the first data packet is all DUT sees about the session.
+
+        # Avoid sending keepalives.
+        m_delay = 2000000  # delay 2000s (2,000,000 ms)
+
+        # Data, not padded yet.
+        udp_data = u""
+        # Pad the data to achieve the intended frame size.
+        udp_data += self._gen_padding(headers_size)
+
+        # Safety check, the current programs send at least 1 packet.
+        if self.n_data_frames < 1:
+            raise RuntimeError("n_data_frames < 1: {self.n_data_frames}")
 
         # Client program.
         prog_c = ASTFProgram(stream=False)
-        prog_c.set_keepalive_msg(self.m_delay)
-        prog_c.send_msg(self.udp_data)
-        # No delay, PPS tests combine connect and data send (no data receive).
-        prog_c.set_var(u"var1", self.n_data)
+        prog_c.set_keepalive_msg(m_delay)
+        prog_c.set_var(u"var1", self.n_data_frames)
         prog_c.set_label(u"a:")
-        prog_c.send_msg(self.udp_data)
+        prog_c.send_msg(udp_data)
         prog_c.jmp_nz(u"var1", u"a:")
         # We should read the server response,
         # but no reason to overload client workers even more.
 
         # Server program.
         prog_s = ASTFProgram(stream=False)
-        prog_s.set_keepalive_msg(self.m_delay)
+        prog_s.set_keepalive_msg(m_delay)
         # If server closes too soon, new instances are started
         # leading in too much replies. To prevent that, we need to recv all.
-        prog_s.recv_msg(1 + self.n_data)
+        prog_s.recv_msg(self.n_data_frames)
         # In packet loss scenarios, some instances never get here.
         # This maybe increases server traffic duration,
         # but no other way if we want to avoid
         # TRex creating a second instance of the same server.
-        prog_s.send_msg(self.udp_data)
-        prog_s.set_var(u"var2", self.n_data)
+        prog_s.set_var(u"var2", self.n_data_frames)
         prog_s.set_label(u"b:")
-        prog_s.send_msg(self.udp_data)
+        prog_s.send_msg(udp_data)
         prog_s.jmp_nz(u"var2", u"b:")
         # VPP never duplicates packets,
         # so it is safe to close the server instance now.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -133,8 +129,8 @@ class TrafficProfile(TrafficProfileBaseClass):
         temp_c = ASTFTCPClientTemplate(
             program=prog_c,
             ip_gen=ip_gen,
-            limit=self.limit,
-            port=8080
+            limit=64512,  # TODO: Any benefit of making this configurable?
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-1024h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-1024h.py
index 78ee8f31fc..a1282adf2f 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-1024h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-1024h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -49,26 +49,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.3.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.3.255"
-
-        # UDP messages
-        self.udp_req = u"GET"
-        self.udp_res = u"ACK"
-
-        # Headers length
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B udp
-
-        # No need to set keepalive, both programs end just after start&send.
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -78,13 +58,29 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates ASTFProfile().
         :rtype: tuple
         """
-        self.udp_req += self._gen_padding(self.headers_size + len(self.udp_req))
-        self.udp_res += self._gen_padding(self.headers_size + len(self.udp_res))
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.3.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.3.255"
+
+        # Headers length
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # UDP messages, not padded yet.
+        udp_req = u"GET"
+        udp_res = u"ACK"
+
+        # Padd to the required frame size.
+        udp_req += self._gen_padding(headers_size + len(udp_req))
+        udp_res += self._gen_padding(headers_size + len(udp_res))
+
+        # No need to set keepalive, both programs end just after start&send.
 
         # client commands
         prog_c = ASTFProgram(stream=False)
         # send REQ message
-        prog_c.send_msg(self.udp_req)
+        prog_c.send_msg(udp_req)
         # No need to process the response, seeing L2 counter is enough.
         # Client program can end here.
 
@@ -93,22 +89,22 @@ class TrafficProfile(TrafficProfileBaseClass):
         # When server instance is created means REQ is visible in L2 counter.
         # No need to receive explicitly?
         # send RES message
-        prog_s.send_msg(self.udp_res)
+        prog_s.send_msg(udp_res)
         # Server program can end here.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -119,7 +115,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=64512,  # TODO: set via input parameter ?
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-16384h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-16384h-pps.py
index 1739fcca31..05976bc45c 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-16384h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-16384h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -46,84 +46,80 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self, **kwargs):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.63.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.63.255"
-
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B UDP
-
-        self.udp_data = u""
-
-        self.n_data = 32  # TODO: set via input parameter
-        self.m_delay = 2000000  # delay 2000s (2,000,000 ms)
-        self.u_delay = 1000 * self.m_delay  # delay 2000s (2,000,000,000 us)
-        self.limit = 1032192
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
         This method MUST return:
 
-            return ip_gen, templates
+            return ip_gen, templates, None
 
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
-        if self.framesize == 64:
-            self.udp_data += self._gen_padding(self.headers_size, 72)
-        if self.framesize == 1518:
-            self.udp_data += self._gen_padding(self.headers_size, 1514)
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.63.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.63.255"
+
+        # The difference between data size and frame size.
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # TODO: Use the "connection protocol" from CPS traffic profile?
+        # Currently, the first data packet is all DUT sees about the session.
+
+        # Avoid sending keepalives.
+        m_delay = 2000000  # delay 2000s (2,000,000 ms)
+
+        # Data, not padded yet.
+        udp_data = u""
+        # Pad the data to achieve the intended frame size.
+        udp_data += self._gen_padding(headers_size)
+
+        # Safety check, the current programs send at least 1 packet.
+        if self.n_data_frames < 1:
+            raise RuntimeError("n_data_frames < 1: {self.n_data_frames}")
 
         # Client program.
         prog_c = ASTFProgram(stream=False)
-        prog_c.set_keepalive_msg(self.m_delay)
-        prog_c.send_msg(self.udp_data)
-        # No delay, PPS tests combine connect and data send (no data receive).
-        prog_c.set_var(u"var1", self.n_data)
+        prog_c.set_keepalive_msg(m_delay)
+        prog_c.set_var(u"var1", self.n_data_frames)
         prog_c.set_label(u"a:")
-        prog_c.send_msg(self.udp_data)
+        prog_c.send_msg(udp_data)
         prog_c.jmp_nz(u"var1", u"a:")
         # We should read the server response,
         # but no reason to overload client workers even more.
 
         # Server program.
         prog_s = ASTFProgram(stream=False)
-        prog_s.set_keepalive_msg(self.m_delay)
+        prog_s.set_keepalive_msg(m_delay)
         # If server closes too soon, new instances are started
         # leading in too much replies. To prevent that, we need to recv all.
-        prog_s.recv_msg(1 + self.n_data)
+        prog_s.recv_msg(self.n_data_frames)
         # In packet loss scenarios, some instances never get here.
         # This maybe increases server traffic duration,
         # but no other way if we want to avoid
         # TRex creating a second instance of the same server.
-        prog_s.send_msg(self.udp_data)
-        prog_s.set_var(u"var2", self.n_data)
+        prog_s.set_var(u"var2", self.n_data_frames)
         prog_s.set_label(u"b:")
-        prog_s.send_msg(self.udp_data)
+        prog_s.send_msg(udp_data)
         prog_s.jmp_nz(u"var2", u"b:")
         # VPP never duplicates packets,
         # so it is safe to close the server instance now.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -133,8 +129,8 @@ class TrafficProfile(TrafficProfileBaseClass):
         temp_c = ASTFTCPClientTemplate(
             program=prog_c,
             ip_gen=ip_gen,
-            limit=self.limit,
-            port=8080
+            limit=1032192,  # TODO: Any benefit of making this configurable?
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-16384h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-16384h.py
index 7d35a68db6..3a1793a617 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-16384h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-16384h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -49,26 +49,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.63.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.63.255"
-
-        # UDP messages
-        self.udp_req = u"GET"
-        self.udp_res = u"ACK"
-
-        # Headers length
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B udp
-
-        # No need to set keepalive, both programs end just after start&send.
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -78,13 +58,29 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates ASTFProfile().
         :rtype: tuple
         """
-        self.udp_req += self._gen_padding(self.headers_size + len(self.udp_req))
-        self.udp_res += self._gen_padding(self.headers_size + len(self.udp_res))
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.63.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.63.255"
+
+        # Headers length
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # UDP messages, not padded yet.
+        udp_req = u"GET"
+        udp_res = u"ACK"
+
+        # Padd to the required frame size.
+        udp_req += self._gen_padding(headers_size + len(udp_req))
+        udp_res += self._gen_padding(headers_size + len(udp_res))
+
+        # No need to set keepalive, both programs end just after start&send.
 
         # client commands
         prog_c = ASTFProgram(stream=False)
         # send REQ message
-        prog_c.send_msg(self.udp_req)
+        prog_c.send_msg(udp_req)
         # No need to process the response, seeing L2 counter is enough.
         # Client program can end here.
 
@@ -93,22 +89,22 @@ class TrafficProfile(TrafficProfileBaseClass):
         # When server instance is created means REQ is visible in L2 counter.
         # No need to receive explicitly?
         # send RES message
-        prog_s.send_msg(self.udp_res)
+        prog_s.send_msg(udp_res)
         # Server program can end here.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -119,7 +115,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=1032192,  # TODO: set via input parameter ?
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h-pps.py
index 9445b11565..801db90095 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -46,84 +46,80 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self, **kwargs):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"172.16.0.0"
-        self.p1_src_end_ip = u"172.19.255.255"
-        self.p1_dst_start_ip = u"20.16.0.0"
-        self.p1_dst_end_ip = u"20.19.255.255"
-
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B UDP
-
-        self.udp_data = u""
-
-        self.n_data = 32  # TODO: set via input parameter
-        self.m_delay = 2000000  # delay 2000s (2,000,000 ms)
-        self.u_delay = 1000 * self.m_delay  # delay 2000s (2,000,000,000 us)
-        self.limit = 16515072
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
         This method MUST return:
 
-            return ip_gen, templates
+            return ip_gen, templates, None
 
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
-        if self.framesize == 64:
-            self.udp_data += self._gen_padding(self.headers_size, 72)
-        if self.framesize == 1518:
-            self.udp_data += self._gen_padding(self.headers_size, 1514)
+        # IPs used in packet headers.
+        p1_src_start_ip = u"172.16.0.0"
+        p1_src_end_ip = u"172.19.255.255"
+        p1_dst_start_ip = u"20.16.0.0"
+        p1_dst_end_ip = u"20.19.255.255"
+
+        # The difference between data size and frame size.
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # TODO: Use the "connection protocol" from CPS traffic profile?
+        # Currently, the first data packet is all DUT sees about the session.
+
+        # Avoid sending keepalives.
+        m_delay = 2000000  # delay 2000s (2,000,000 ms)
+
+        # Data, not padded yet.
+        udp_data = u""
+        # Pad the data to achieve the intended frame size.
+        udp_data += self._gen_padding(headers_size)
+
+        # Safety check, the current programs send at least 1 packet.
+        if self.n_data_frames < 1:
+            raise RuntimeError("n_data_frames < 1: {self.n_data_frames}")
 
         # Client program.
         prog_c = ASTFProgram(stream=False)
-        prog_c.set_keepalive_msg(self.m_delay)
-        prog_c.send_msg(self.udp_data)
-        # No delay, PPS tests combine connect and data send (no data receive).
-        prog_c.set_var(u"var1", self.n_data)
+        prog_c.set_keepalive_msg(m_delay)
+        prog_c.set_var(u"var1", self.n_data_frames)
         prog_c.set_label(u"a:")
-        prog_c.send_msg(self.udp_data)
+        prog_c.send_msg(udp_data)
         prog_c.jmp_nz(u"var1", u"a:")
         # We should read the server response,
         # but no reason to overload client workers even more.
 
         # Server program.
         prog_s = ASTFProgram(stream=False)
-        prog_s.set_keepalive_msg(self.m_delay)
+        prog_s.set_keepalive_msg(m_delay)
         # If server closes too soon, new instances are started
         # leading in too much replies. To prevent that, we need to recv all.
-        prog_s.recv_msg(1 + self.n_data)
+        prog_s.recv_msg(self.n_data_frames)
         # In packet loss scenarios, some instances never get here.
         # This maybe increases server traffic duration,
         # but no other way if we want to avoid
         # TRex creating a second instance of the same server.
-        prog_s.send_msg(self.udp_data)
-        prog_s.set_var(u"var2", self.n_data)
+        prog_s.set_var(u"var2", self.n_data_frames)
         prog_s.set_label(u"b:")
-        prog_s.send_msg(self.udp_data)
+        prog_s.send_msg(udp_data)
         prog_s.jmp_nz(u"var2", u"b:")
         # VPP never duplicates packets,
         # so it is safe to close the server instance now.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -133,8 +129,8 @@ class TrafficProfile(TrafficProfileBaseClass):
         temp_c = ASTFTCPClientTemplate(
             program=prog_c,
             ip_gen=ip_gen,
-            limit=self.limit,
-            port=8080
+            limit=16515072,  # TODO: Any benefit of making this configurable?
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h.py
index 8fe8f02a91..2203cf3d0b 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -49,26 +49,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"172.16.0.0"
-        self.p1_src_end_ip = u"172.19.255.255"
-        self.p1_dst_start_ip = u"20.16.0.0"
-        self.p1_dst_end_ip = u"20.19.255.255"
-
-        # UDP messages
-        self.udp_req = u"GET"
-        self.udp_res = u"ACK"
-
-        # Headers length
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B udp
-
-        # No need to set keepalive, both programs end just after start&send.
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -78,13 +58,29 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates ASTFProfile().
         :rtype: tuple
         """
-        self.udp_req += self._gen_padding(self.headers_size + len(self.udp_req))
-        self.udp_res += self._gen_padding(self.headers_size + len(self.udp_res))
+        # IPs used in packet headers.
+        p1_src_start_ip = u"172.16.0.0"
+        p1_src_end_ip = u"172.19.255.255"
+        p1_dst_start_ip = u"20.16.0.0"
+        p1_dst_end_ip = u"20.19.255.255"
+
+        # Headers length
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # UDP messages, not padded yet.
+        udp_req = u"GET"
+        udp_res = u"ACK"
+
+        # Padd to the required frame size.
+        udp_req += self._gen_padding(headers_size + len(udp_req))
+        udp_res += self._gen_padding(headers_size + len(udp_res))
+
+        # No need to set keepalive, both programs end just after start&send.
 
         # client commands
         prog_c = ASTFProgram(stream=False)
         # send REQ message
-        prog_c.send_msg(self.udp_req)
+        prog_c.send_msg(udp_req)
         # No need to process the response, seeing L2 counter is enough.
         # Client program can end here.
 
@@ -93,22 +89,22 @@ class TrafficProfile(TrafficProfileBaseClass):
         # When server instance is created means REQ is visible in L2 counter.
         # No need to receive explicitly?
         # send RES message
-        prog_s.send_msg(self.udp_res)
+        prog_s.send_msg(udp_res)
         # Server program can end here.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -119,7 +115,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=16515072,  # TODO: set via input parameter ?
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-4096h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-4096h-pps.py
index 00dbeee308..5de25273ef 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-4096h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-4096h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -46,84 +46,80 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self, **kwargs):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.15.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.15.255"
-
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B UDP
-
-        self.udp_data = u""
-
-        self.n_data = 32  # TODO: set via input parameter
-        self.m_delay = 2000000  # delay 2000s (2,000,000 ms)
-        self.u_delay = 1000 * self.m_delay  # delay 2000s (2,000,000,000 us)
-        self.limit = 258048
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
         This method MUST return:
 
-            return ip_gen, templates
+            return ip_gen, templates, None
 
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
-        if self.framesize == 64:
-            self.udp_data += self._gen_padding(self.headers_size, 72)
-        if self.framesize == 1518:
-            self.udp_data += self._gen_padding(self.headers_size, 1514)
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.15.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.15.255"
+
+        # The difference between data size and frame size.
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # TODO: Use the "connection protocol" from CPS traffic profile?
+        # Currently, the first data packet is all DUT sees about the session.
+
+        # Avoid sending keepalives.
+        m_delay = 2000000  # delay 2000s (2,000,000 ms)
+
+        # Data, not padded yet.
+        udp_data = u""
+        # Pad the data to achieve the intended frame size.
+        udp_data += self._gen_padding(headers_size)
+
+        # Safety check, the current programs send at least 1 packet.
+        if self.n_data_frames < 1:
+            raise RuntimeError("n_data_frames < 1: {self.n_data_frames}")
 
         # Client program.
         prog_c = ASTFProgram(stream=False)
-        prog_c.set_keepalive_msg(self.m_delay)
-        prog_c.send_msg(self.udp_data)
-        # No delay, PPS tests combine connect and data send (no data receive).
-        prog_c.set_var(u"var1", self.n_data)
+        prog_c.set_keepalive_msg(m_delay)
+        prog_c.set_var(u"var1", self.n_data_frames)
         prog_c.set_label(u"a:")
-        prog_c.send_msg(self.udp_data)
+        prog_c.send_msg(udp_data)
         prog_c.jmp_nz(u"var1", u"a:")
         # We should read the server response,
         # but no reason to overload client workers even more.
 
         # Server program.
         prog_s = ASTFProgram(stream=False)
-        prog_s.set_keepalive_msg(self.m_delay)
+        prog_s.set_keepalive_msg(m_delay)
         # If server closes too soon, new instances are started
         # leading in too much replies. To prevent that, we need to recv all.
-        prog_s.recv_msg(1 + self.n_data)
+        prog_s.recv_msg(self.n_data_frames)
         # In packet loss scenarios, some instances never get here.
         # This maybe increases server traffic duration,
         # but no other way if we want to avoid
         # TRex creating a second instance of the same server.
-        prog_s.send_msg(self.udp_data)
-        prog_s.set_var(u"var2", self.n_data)
+        prog_s.set_var(u"var2", self.n_data_frames)
         prog_s.set_label(u"b:")
-        prog_s.send_msg(self.udp_data)
+        prog_s.send_msg(udp_data)
         prog_s.jmp_nz(u"var2", u"b:")
         # VPP never duplicates packets,
         # so it is safe to close the server instance now.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -133,8 +129,8 @@ class TrafficProfile(TrafficProfileBaseClass):
         temp_c = ASTFTCPClientTemplate(
             program=prog_c,
             ip_gen=ip_gen,
-            limit=self.limit,
-            port=8080
+            limit=258048,  # TODO: Any benefit of making this configurable?
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-4096h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-4096h.py
index 2285a633b0..81c074e5e3 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-4096h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-4096h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -49,26 +49,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.15.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.15.255"
-
-        # UDP messages
-        self.udp_req = u"GET"
-        self.udp_res = u"ACK"
-
-        # Headers length
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B udp
-
-        # No need to set keepalive, both programs end just after start&send.
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -78,13 +58,29 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates ASTFProfile().
         :rtype: tuple
         """
-        self.udp_req += self._gen_padding(self.headers_size + len(self.udp_req))
-        self.udp_res += self._gen_padding(self.headers_size + len(self.udp_res))
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.15.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.15.255"
+
+        # Headers length
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # UDP messages, not padded yet.
+        udp_req = u"GET"
+        udp_res = u"ACK"
+
+        # Padd to the required frame size.
+        udp_req += self._gen_padding(headers_size + len(udp_req))
+        udp_res += self._gen_padding(headers_size + len(udp_res))
+
+        # No need to set keepalive, both programs end just after start&send.
 
         # client commands
         prog_c = ASTFProgram(stream=False)
         # send REQ message
-        prog_c.send_msg(self.udp_req)
+        prog_c.send_msg(udp_req)
         # No need to process the response, seeing L2 counter is enough.
         # Client program can end here.
 
@@ -93,22 +89,22 @@ class TrafficProfile(TrafficProfileBaseClass):
         # When server instance is created means REQ is visible in L2 counter.
         # No need to receive explicitly?
         # send RES message
-        prog_s.send_msg(self.udp_res)
+        prog_s.send_msg(udp_res)
         # Server program can end here.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -119,7 +115,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=258048,  # TODO: set via input parameter ?
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-65536h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-65536h-pps.py
index 3b6c3c7e55..73270607c1 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-65536h-pps.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-65536h-pps.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -46,84 +46,80 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self, **kwargs):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.255.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.255.255"
-
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B UDP
-
-        self.udp_data = u""
-
-        self.n_data = 32  # TODO: set via input parameter
-        self.m_delay = 2000000  # delay 2000s (2,000,000 ms)
-        self.u_delay = 1000 * self.m_delay  # delay 2000s (2,000,000,000 us)
-        self.limit = 4128768
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
         This method MUST return:
 
-            return ip_gen, templates
+            return ip_gen, templates, None
 
         :returns: IP generator and profile templates for ASTFProfile().
         :rtype: tuple
         """
-        if self.framesize == 64:
-            self.udp_data += self._gen_padding(self.headers_size, 72)
-        if self.framesize == 1518:
-            self.udp_data += self._gen_padding(self.headers_size, 1514)
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.255.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.255.255"
+
+        # The difference between data size and frame size.
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # TODO: Use the "connection protocol" from CPS traffic profile?
+        # Currently, the first data packet is all DUT sees about the session.
+
+        # Avoid sending keepalives.
+        m_delay = 2000000  # delay 2000s (2,000,000 ms)
+
+        # Data, not padded yet.
+        udp_data = u""
+        # Pad the data to achieve the intended frame size.
+        udp_data += self._gen_padding(headers_size)
+
+        # Safety check, the current programs send at least 1 packet.
+        if self.n_data_frames < 1:
+            raise RuntimeError("n_data_frames < 1: {self.n_data_frames}")
 
         # Client program.
         prog_c = ASTFProgram(stream=False)
-        prog_c.set_keepalive_msg(self.m_delay)
-        prog_c.send_msg(self.udp_data)
-        # No delay, PPS tests combine connect and data send (no data receive).
-        prog_c.set_var(u"var1", self.n_data)
+        prog_c.set_keepalive_msg(m_delay)
+        prog_c.set_var(u"var1", self.n_data_frames)
         prog_c.set_label(u"a:")
-        prog_c.send_msg(self.udp_data)
+        prog_c.send_msg(udp_data)
         prog_c.jmp_nz(u"var1", u"a:")
         # We should read the server response,
         # but no reason to overload client workers even more.
 
         # Server program.
         prog_s = ASTFProgram(stream=False)
-        prog_s.set_keepalive_msg(self.m_delay)
+        prog_s.set_keepalive_msg(m_delay)
         # If server closes too soon, new instances are started
         # leading in too much replies. To prevent that, we need to recv all.
-        prog_s.recv_msg(1 + self.n_data)
+        prog_s.recv_msg(self.n_data_frames)
         # In packet loss scenarios, some instances never get here.
         # This maybe increases server traffic duration,
         # but no other way if we want to avoid
         # TRex creating a second instance of the same server.
-        prog_s.send_msg(self.udp_data)
-        prog_s.set_var(u"var2", self.n_data)
+        prog_s.set_var(u"var2", self.n_data_frames)
         prog_s.set_label(u"b:")
-        prog_s.send_msg(self.udp_data)
+        prog_s.send_msg(udp_data)
         prog_s.jmp_nz(u"var2", u"b:")
         # VPP never duplicates packets,
         # so it is safe to close the server instance now.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -133,8 +129,8 @@ class TrafficProfile(TrafficProfileBaseClass):
         temp_c = ASTFTCPClientTemplate(
             program=prog_c,
             ip_gen=ip_gen,
-            limit=self.limit,
-            port=8080
+            limit=4128768,  # TODO: Any benefit of making this configurable?
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-65536h.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-65536h.py
index 327cc36e01..f1ee9125f2 100644
--- a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-65536h.py
+++ b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-65536h.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
 #
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #
@@ -49,26 +49,6 @@ from profile_trex_astf_base_class import TrafficProfileBaseClass
 class TrafficProfile(TrafficProfileBaseClass):
     """Traffic profile."""
 
-    def __init__(self):
-        """Initialization and setting of profile parameters."""
-
-        super(TrafficProfileBaseClass, self).__init__()
-
-        # IPs used in packet headers.
-        self.p1_src_start_ip = u"192.168.0.0"
-        self.p1_src_end_ip = u"192.168.255.255"
-        self.p1_dst_start_ip = u"20.0.0.0"
-        self.p1_dst_end_ip = u"20.0.255.255"
-
-        # UDP messages
-        self.udp_req = u"GET"
-        self.udp_res = u"ACK"
-
-        # Headers length
-        self.headers_size = 42  # 14B l2 + 20B ipv4 + 8B udp
-
-        # No need to set keepalive, both programs end just after start&send.
-
     def define_profile(self):
         """Define profile to be used by advanced stateful traffic generator.
 
@@ -78,13 +58,29 @@ class TrafficProfile(TrafficProfileBaseClass):
         :returns: IP generator and profile templates ASTFProfile().
         :rtype: tuple
         """
-        self.udp_req += self._gen_padding(self.headers_size + len(self.udp_req))
-        self.udp_res += self._gen_padding(self.headers_size + len(self.udp_res))
+        # IPs used in packet headers.
+        p1_src_start_ip = u"192.168.0.0"
+        p1_src_end_ip = u"192.168.255.255"
+        p1_dst_start_ip = u"20.0.0.0"
+        p1_dst_end_ip = u"20.0.255.255"
+
+        # Headers length
+        headers_size = 46  # 18B L2 + 20B IPv4 + 8B UDP.
+
+        # UDP messages, not padded yet.
+        udp_req = u"GET"
+        udp_res = u"ACK"
+
+        # Padd to the required frame size.
+        udp_req += self._gen_padding(headers_size + len(udp_req))
+        udp_res += self._gen_padding(headers_size + len(udp_res))
+
+        # No need to set keepalive, both programs end just after start&send.
 
         # client commands
         prog_c = ASTFProgram(stream=False)
         # send REQ message
-        prog_c.send_msg(self.udp_req)
+        prog_c.send_msg(udp_req)
         # No need to process the response, seeing L2 counter is enough.
         # Client program can end here.
 
@@ -93,22 +89,22 @@ class TrafficProfile(TrafficProfileBaseClass):
         # When server instance is created means REQ is visible in L2 counter.
         # No need to receive explicitly?
         # send RES message
-        prog_s.send_msg(self.udp_res)
+        prog_s.send_msg(udp_res)
         # Server program can end here.
 
         # ip generators
         ip_gen_c = ASTFIPGenDist(
-            ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_src_start_ip, p1_src_end_ip],
+            distribution=u"seq",
         )
         ip_gen_s = ASTFIPGenDist(
-            ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
-            distribution=u"seq"
+            ip_range=[p1_dst_start_ip, p1_dst_end_ip],
+            distribution=u"seq",
         )
         ip_gen = ASTFIPGen(
             glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
             dist_client=ip_gen_c,
-            dist_server=ip_gen_s
+            dist_server=ip_gen_s,
         )
 
         # server association
@@ -119,7 +115,7 @@ class TrafficProfile(TrafficProfileBaseClass):
             program=prog_c,
             ip_gen=ip_gen,
             limit=4128768,  # TODO: set via input parameter ?
-            port=8080
+            port=8080,
         )
         temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
         template = ASTFTemplate(client_template=temp_c, server_template=temp_s)