From 2e85b7ccef45924f1aae03513e116b9087c7ef69 Mon Sep 17 00:00:00 2001 From: Christian Breunig Date: Sat, 28 Oct 2023 20:57:38 +0200 Subject: vxlan: T5668: add CLI knob to enable ARP/ND suppression In order to minimize the flooding of ARP and ND messages in the VXLAN network, EVPN includes provisions [1] that allow participating VTEPs to suppress such messages in case they know the MAC-IP binding and can reply on behalf of the remote host. In Linux, the above is implemented in the bridge driver using a per-port option called "neigh_suppress" that was added in kernel version 4.15. [1] https://www.rfc-editor.org/rfc/rfc7432#section-10 (cherry picked from commit ec9a95502daa88b9632af12524e7cefebf86bab6) --- smoketest/scripts/cli/test_interfaces_vxlan.py | 39 ++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) (limited to 'smoketest/scripts') diff --git a/smoketest/scripts/cli/test_interfaces_vxlan.py b/smoketest/scripts/cli/test_interfaces_vxlan.py index cf05148ae..3a8b8ab99 100755 --- a/smoketest/scripts/cli/test_interfaces_vxlan.py +++ b/smoketest/scripts/cli/test_interfaces_vxlan.py @@ -177,11 +177,50 @@ class VXLANInterfaceTest(BasicInterfaceTest.TestCase): tmp = get_interface_config(interface) self.assertEqual(tmp['master'], bridge) + self.assertFalse(tmp['linkinfo']['info_slave_data']['neigh_suppress']) tmp = get_vxlan_vlan_tunnels('vxlan0') self.assertEqual(tmp, list(vlan_to_vni)) self.cli_delete(['interfaces', 'bridge', bridge]) + def test_vxlan_neighbor_suppress(self): + bridge = 'br555' + interface = 'vxlan555' + source_interface = 'eth0' + + self.cli_set(self._base_path + [interface, 'external']) + self.cli_set(self._base_path + [interface, 'source-interface', source_interface]) + + self.cli_set(self._base_path + [interface, 'parameters', 'neighbor-suppress']) + + # This must fail as this VXLAN interface is not associated with any bridge + with self.assertRaises(ConfigSessionError): + self.cli_commit() + self.cli_set(['interfaces', 'bridge', bridge, 'member', 'interface', interface]) + + # commit configuration + self.cli_commit() + + self.assertTrue(interface_exists(bridge)) + self.assertTrue(interface_exists(interface)) + + tmp = get_interface_config(interface) + self.assertEqual(tmp['master'], bridge) + self.assertTrue(tmp['linkinfo']['info_slave_data']['neigh_suppress']) + self.assertFalse(tmp['linkinfo']['info_slave_data']['learning']) + + # Remove neighbor suppress configuration and re-test + self.cli_delete(self._base_path + [interface, 'parameters', 'neighbor-suppress']) + # commit configuration + self.cli_commit() + + tmp = get_interface_config(interface) + self.assertEqual(tmp['master'], bridge) + self.assertFalse(tmp['linkinfo']['info_slave_data']['neigh_suppress']) + self.assertTrue(tmp['linkinfo']['info_slave_data']['learning']) + + self.cli_delete(['interfaces', 'bridge', bridge]) + if __name__ == '__main__': unittest.main(verbosity=2) -- cgit v1.2.3