[swss] add static anycast gateway support

yanjundeng commented 5 months ago

What I did Resync the original SAG support to latest master branch: https://github.com/sonic-net/sonic-swss/pull/1974

Some improvements based on the original PR:

only add SAG-related IPv6 linklocal route for the VRF which has SAG-enabled interface
add SAG related FDB entry into linux bridge for the SAG-enabled vlan interface
Recover the vlan interface's mac in linux kernel to system mac once this SAG is disabled internally, for example unbind VRF or delete VRF case
fix some pytest issues in pipeline

Why I did it

How I verified it

Details if related

yanjundeng commented 4 months ago

/azpw run Azure.sonic-swss

mssonicbld commented 4 months ago

/AzurePipelines run Azure.sonic-swss

azure-pipelines[bot] commented 4 months ago

Pull request contains merge conflicts.

sonic-net / sonic-swss