The default configuration of OVS bridge (unlike linux bridge) is to disable multicast snooping. That may case excess multicast traffic flowing into the pod without being filtered by ovn-kubernetes localnet bridge. To avoid this, OCPBUGS-54909 proposes change to the examples in our docs - to guide users to enable snoop filtering by default.

Our localnet tests should use this attribute too.

4.15+

Always, test coverage out of sync

1. Go to our T2 tests

They cover localnet on top of a dedicated OVS bridge without any snooping configuration 

Multicast snoop filtering should be enabled. See OCPBUGS-54909 to know how

Update (Yossi Segev 2025-Apr-15):
Updating the tests should be done both in polarion and in automation.