+ def test_mgre6(self):
+ """mGRE IPv6 tunnel Tests"""
+
+ self.pg0.config_ip6()
+ self.pg0.resolve_ndp()
+
+ e = VppEnum.vl_api_tunnel_encap_decap_flags_t
+
+ for itf in self.pg_interfaces[3:]:
+ #
+ # one underlay nh for each overlay/tunnel peer
+ #
+ itf.config_ip6()
+ itf.generate_remote_hosts(4)
+ itf.configure_ipv6_neighbors()
+
+ #
+ # Create an L3 GRE tunnel.
+ # - set it admin up
+ # - assign an IP Addres
+ # - Add a route via the tunnel
+ #
+ gre_if = VppGreInterface(
+ self,
+ itf.local_ip6,
+ "::",
+ mode=(VppEnum.vl_api_tunnel_mode_t.TUNNEL_API_MODE_MP),
+ flags=e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP,
+ )
+
+ gre_if.add_vpp_config()
+ gre_if.admin_up()
+ gre_if.config_ip6()
+ gre_if.generate_remote_hosts(4)
+
+ #
+ # for-each peer
+ #
+ for ii in range(1, 4):
+ route_addr = "4::%d" % ii
+
+ #
+ # Add a TEIB entry resolves the peer
+ #
+ teib = VppTeib(
+ self,
+ gre_if,
+ gre_if._remote_hosts[ii].ip6,
+ itf._remote_hosts[ii].ip6,
+ )
+ teib.add_vpp_config()
+
+ #
+ # route traffic via the peer
+ #
+ route_via_tun = VppIpRoute(
+ self,
+ route_addr,
+ 128,
+ [VppRoutePath(gre_if._remote_hosts[ii].ip6, gre_if.sw_if_index)],
+ )
+ route_via_tun.add_vpp_config()
+
+ #
+ # Send a packet stream that is routed into the tunnel
+ # - packets are GRE encapped
+ #
+ tx_e = self.create_stream_ip6(
+ self.pg0, "5::5", route_addr, dscp=2, ecn=1
+ )
+ rx = self.send_and_expect(self.pg0, tx_e, itf)
+ self.verify_tunneled_6o6(
+ self.pg0, rx, tx_e, itf.local_ip6, itf._remote_hosts[ii].ip6, dscp=2
+ )
+ tx_i = self.create_tunnel_stream_6o6(
+ self.pg0,
+ itf._remote_hosts[ii].ip6,
+ itf.local_ip6,
+ self.pg0.local_ip6,
+ self.pg0.remote_ip6,
+ )
+ rx = self.send_and_expect(self.pg0, tx_i, self.pg0)
+ self.verify_decapped_6o6(self.pg0, rx, tx_i)
+
+ #
+ # delete and re-add the TEIB
+ #
+ teib.remove_vpp_config()
+ self.send_and_assert_no_replies(self.pg0, tx_e)
+
+ teib.add_vpp_config()
+ rx = self.send_and_expect(self.pg0, tx_e, itf)
+ self.verify_tunneled_6o6(
+ self.pg0, rx, tx_e, itf.local_ip6, itf._remote_hosts[ii].ip6, dscp=2
+ )
+ rx = self.send_and_expect(self.pg0, tx_i, self.pg0)
+ self.verify_decapped_6o6(self.pg0, rx, tx_i)
+
+ gre_if.admin_down()
+ gre_if.unconfig_ip4()
+ itf.unconfig_ip6()
+ self.pg0.unconfig_ip6()
+