+ def test_ns_duplicates(self):
+ """ ARP Duplicates"""
+
+ #
+ # Generate some hosts on the LAN
+ #
+ self.pg1.generate_remote_hosts(3)
+
+ #
+ # Add host 1 on pg1 and pg2
+ #
+ ns_pg1 = VppNeighbor(self,
+ self.pg1.sw_if_index,
+ self.pg1.remote_hosts[1].mac,
+ self.pg1.remote_hosts[1].ip6,
+ af=AF_INET6)
+ ns_pg1.add_vpp_config()
+ ns_pg2 = VppNeighbor(self,
+ self.pg2.sw_if_index,
+ self.pg2.remote_mac,
+ self.pg1.remote_hosts[1].ip6,
+ af=AF_INET6)
+ ns_pg2.add_vpp_config()
+
+ #
+ # IP packet destined for pg1 remote host arrives on pg1 again.
+ #
+ p = (Ether(dst=self.pg0.local_mac,
+ src=self.pg0.remote_mac) /
+ IPv6(src=self.pg0.remote_ip6,
+ dst=self.pg1.remote_hosts[1].ip6) /
+ UDP(sport=1234, dport=1234) /
+ Raw())
+
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx1 = self.pg1.get_capture(1)
+
+ self.verify_ip(rx1[0],
+ self.pg1.local_mac,
+ self.pg1.remote_hosts[1].mac,
+ self.pg0.remote_ip6,
+ self.pg1.remote_hosts[1].ip6)
+
+ #
+ # remove the duplicate on pg1
+ # packet stream shoud generate ARPs out of pg1
+ #
+ ns_pg1.remove_vpp_config()
+
+ self.send_and_expect_ns(self.pg0, self.pg1,
+ p, self.pg1.remote_hosts[1].ip6)
+
+ #
+ # Add it back
+ #
+ ns_pg1.add_vpp_config()
+
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx1 = self.pg1.get_capture(1)
+
+ self.verify_ip(rx1[0],
+ self.pg1.local_mac,
+ self.pg1.remote_hosts[1].mac,
+ self.pg0.remote_ip6,
+ self.pg1.remote_hosts[1].ip6)
+