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authorJan Gelety <jgelety@cisco.com>2021-01-11 02:34:17 +0100
committerJan Gelety <jgelety@cisco.com>2021-01-22 12:28:18 +0000
commit67d3b2a44d49dd2c4a1b2f722849f57432787137 (patch)
treed4cc223c15237986ccbc03ed90f03b7ab21c65fc /docs/report/introduction/methodology_geneve.rst
parent0c489b1767a031837f320c1fb5e45947ac82ea4d (diff)
Report: add geneve to perf release notes
Change-Id: I0473bda59edf874119a474fb2e84177e19f58d02 Signed-off-by: Jan Gelety <jgelety@cisco.com>
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+.. _geneve_methodology:
+
+Generic Network Virtualization Encapsulation
+--------------------------------------------
+
+GENEVE Prefix Bindings
+^^^^^^^^^^^^^^^^^^^^^^
+
+GENEVE prefix bindings should be representative to target applications, where
+a packet flows of particular set of IPv4 addresses (L3 underlay network) is
+routed via dedicated GENEVE interface by building an L2 overlay.
+
+Private address ranges to be used in tests:
+
+- East hosts ip address range: 10.0.1.0 - 10.127.255.255 (10.0/9 prefix)
+
+ - Total of 2^23 - 256 (8 388 352) of usable IPv4 addresses
+ - Usable in tests for up to 32 767 GENEVE tunnels (IPv4 underlay networks)
+
+- West hosts ip address range: 10.128.1.0 - 10.255.255.255 (10.128/9 prefix)
+
+ - Total of 2^23 - 256 (8 388 352) of usable IPv4 addresses
+ - Usable in tests for up to 32 767 GENEVE tunnels (IPv4 underlay networks)
+
+GENEVE Tunnel Scale
+~~~~~~~~~~~~~~~~~~~
+
+If N is a number of GENEVE tunnels (and IPv4 underlay networks) then TG sends
+256 packet flows in every of N different sets:
+
+- i = 1,2,3, ... N - GENEVE tunnel index
+
+- East-West direction: GENEVE encapsulated packets
+
+ - Outer IP header:
+
+ - src ip: 1.1.1.1
+
+ - dst ip: 1.1.1.2
+
+ - GENEVE header:
+
+ - vni: i
+
+ - Inner IP header:
+
+ - src_ip_range(i) = 10.(0 + rounddown(i/255)).(modulo(i/255)).(0-to-255)
+
+ - dst_ip_range(i) = 10.(128 + rounddown(i/255)).(modulo(i/255)).(0-to-255)
+
+- West-East direction: non-encapsulated packets
+
+ - IP header:
+
+ - src_ip_range(i) = 10.(128 + rounddown(i/255)).(modulo(i/255)).(0-to-255)
+
+ - dst_ip_range(i) = 10.(0 + rounddown(i/255)).(modulo(i/255)).(0-to-255)
+
++----------------+-------------+
+| geneve-tunnels | total-flows |
++================+=============+
+| 1 | 256 |
++----------------+-------------+
+| 4 | 1 024 |
++----------------+-------------+
+| 16 | 4 096 |
++----------------+-------------+
+| 64 | 16 384 |
++----------------+-------------+
+| 256 | 65 536 |
++----------------+-------------+
+| 1 024 | 262 144 |
++----------------+-------------+