ethernet: T6306: add support for EVPN MH uplink/core tracking (backport #3447)

[mergify]

Change Summary

When all the underlay links go down the PE no longer has access to the VxLAN +overlay.

To prevent blackholing of traffic the server/ES links are protodowned on the PE. A link can be setup for uplink tracking via the following configuration:

set interfaces ethernet eth0 evpn uplink

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T6306

Related PR(s)

• T5698 EVPN ESI Multihoming #2416
• evpn: T6306: add multihoming documentation vyos-documentation#1443

Component(s) name

• ethernet interface
• frr

Proposed changes

New CLI command set interfaces ethernet eth0 evpn uplink

How to test

Smoketest result

test_add_multiple_ip_addresses (__main__.EthernetInterfaceTest.test_add_multiple_ip_addresses) ... ok
test_add_single_ip_address (__main__.EthernetInterfaceTest.test_add_single_ip_address) ... ok
test_dhcp_client_options (__main__.EthernetInterfaceTest.test_dhcp_client_options) ... ok
test_dhcp_disable_interface (__main__.EthernetInterfaceTest.test_dhcp_disable_interface) ... ok
test_dhcp_vrf (__main__.EthernetInterfaceTest.test_dhcp_vrf) ... ok
test_dhcpv6_client_options (__main__.EthernetInterfaceTest.test_dhcpv6_client_options) ... ok
test_dhcpv6_vrf (__main__.EthernetInterfaceTest.test_dhcpv6_vrf) ... ok
test_dhcpv6pd_auto_sla_id (__main__.EthernetInterfaceTest.test_dhcpv6pd_auto_sla_id) ... ok
test_dhcpv6pd_manual_sla_id (__main__.EthernetInterfaceTest.test_dhcpv6pd_manual_sla_id) ... ok
test_eapol_support (__main__.EthernetInterfaceTest.test_eapol_support) ... ok
test_ethtool_evpn_uplink_tarcking (__main__.EthernetInterfaceTest.test_ethtool_evpn_uplink_tarcking) ... ok <-- NEW!
test_ethtool_flow_control (__main__.EthernetInterfaceTest.test_ethtool_flow_control) ... ok
test_ethtool_ring_buffer (__main__.EthernetInterfaceTest.test_ethtool_ring_buffer) ... ok
test_interface_description (__main__.EthernetInterfaceTest.test_interface_description) ... ok
test_interface_disable (__main__.EthernetInterfaceTest.test_interface_disable) ... ok
test_interface_ip_options (__main__.EthernetInterfaceTest.test_interface_ip_options) ... ok
test_interface_ipv6_options (__main__.EthernetInterfaceTest.test_interface_ipv6_options) ... ok
test_interface_mtu (__main__.EthernetInterfaceTest.test_interface_mtu) ... ok
test_ipv6_link_local_address (__main__.EthernetInterfaceTest.test_ipv6_link_local_address) ... ok
test_mtu_1200_no_ipv6_interface (__main__.EthernetInterfaceTest.test_mtu_1200_no_ipv6_interface) ... ok
test_non_existing_interface (__main__.EthernetInterfaceTest.test_non_existing_interface) ... ok
test_offloading_rfs (__main__.EthernetInterfaceTest.test_offloading_rfs) ... ok
test_offloading_rps (__main__.EthernetInterfaceTest.test_offloading_rps) ... ok
test_span_mirror (__main__.EthernetInterfaceTest.test_span_mirror) ... ok
test_speed_duplex_verify (__main__.EthernetInterfaceTest.test_speed_duplex_verify) ... ok
test_vif_8021q_interfaces (__main__.EthernetInterfaceTest.test_vif_8021q_interfaces) ... ok
test_vif_8021q_lower_up_down (__main__.EthernetInterfaceTest.test_vif_8021q_lower_up_down) ... ok
test_vif_8021q_mtu_limits (__main__.EthernetInterfaceTest.test_vif_8021q_mtu_limits) ... ok
test_vif_8021q_qos_change (__main__.EthernetInterfaceTest.test_vif_8021q_qos_change) ... ok
test_vif_s_8021ad_vlan_interfaces (__main__.EthernetInterfaceTest.test_vif_s_8021ad_vlan_interfaces) ... ok
test_vif_s_protocol_change (__main__.EthernetInterfaceTest.test_vif_s_protocol_change) ... ok

----------------------------------------------------------------------
Ran 31 tests in 299.546s

OK

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

---

This is an automatic backport of pull request #3447 done by [Mergify](https://mergify.com).