test: ip6 vrf instances multi-context test (CSIT-497)

- add/delete IPv6 VRF instances and verify results by parsing output
  of ip6_fib_dump API command and by traffic

- small changes in assert_nothing_captured and get_capture to get logged
  unexpected packets

Change-Id: I32207447be2df942e335aa9890ff52fb88e46597
Signed-off-by: Jan Gelety <jgelety@cisco.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/test/vpp_interface.py b/test/vpp_interface.py
index 29edb70e..9c904aac 100644
--- a/test/vpp_interface.py
+++ b/test/vpp_interface.py
@@ -226,12 +226,16 @@ class VppInterface(object):
             self.has_ip6_config = False
         self.has_ip6_config = False
 
-    def configure_ipv6_neighbors(self):
-        """For every remote host assign neighbor's MAC to IPv6 address."""
+    def configure_ipv6_neighbors(self, vrf_id=0):
+        """For every remote host assign neighbor's MAC to IPv6 addresses.
+
+        :param vrf_id: The FIB table / VRF ID. (Default value = 0)
+        """
         for host in self._remote_hosts:
             macn = host.mac.replace(":", "").decode('hex')
+            ipn = host.ip6n
             self.test.vapi.ip_neighbor_add_del(
-                self.sw_if_index, macn, host.ip6n, is_ipv6=1)
+                self.sw_if_index, macn, ipn, vrf_id, is_ipv6=1)
 
     def unconfig(self):
         """Unconfigure IPv6 and IPv4 address on the VPP interface."""