[Test Gap][BFD static route][T2] Test what will happen to BFD static route when shutting down only one port channel member

[cyw233]

Test Gap Description

We are seeing unexpected behaviors regarding BFD on different image versions:

• On 202305 image, when shutting down one port channel member, the port channel will be marked as Down, but the BFD Up count remains the same, as if nothing has happened
• On 202405 image, when shutting down one port channel member, the port channel will be marked as Down, and the BFD Up count on that LC keeps changing

Currently, we have a test case that covers port channel member flap (code link), but that test case shuts down all interfaces, instead of just one member. Therefore, we should have a test case for testing what will happen when shutting down only one port channel member.

Test Plan

Follow the similar pattern of existing test_bfd_portchannel_member_flap test case but this time we only shut down one port channel member instead of all members.

Test environment

No response

Attach files (if any)

No response