Skip forced mgmt route test if intf is invalid

[dayouliu1]

Description of PR

Summary: Fixes #169

Type of change

• [x] Bug fix
• [ ] Testbed and Framework(new/improvement)
• [ ] Test case(new/improvement)

Back port request

• [ ] 202012
• [ ] 202205
• [ ] 202305
• [x] 202311
• [x] 202405

Approach

What is the motivation for this PR?

Skip test_forced_mgmt_route_add_and_remove_by_mgmt_port_status in route/test_forced_mgmt_route.py if eth1 does not exist or is being used. This test was failing on Arista platforms when interface eth1 did not exist.

How did you do it?

Added a check to see if eth1 does not exist, and skips the test if so.

How did you verify/test it?

Tested on a t0 setup on a Arista-7260

Any platform specific information?

Supported testbed topology if it's a new test case?

Documentation

[linux-foundation-easycla[bot]]

• :white_check_mark:login: dayouliu1 / (518c544cc2b1326ea37dfa056c9b8fa1854008f1)

The committers listed above are authorized under a signed CLA.

hi @liuh-80 could you help to take a look?

[StormLiangMS]

/azp run Azure.sonic-mgmt

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[StormLiangMS]

hi @liuh-80 let's leave the cherry pick approve to the release manager.

[StormLiangMS]

hi @yxieca for cherry pick.

[mssonicbld]

Cherry-pick PR to 202405: https://github.com/sonic-net/sonic-mgmt/pull/13583

[mssonicbld]

Cherry-pick PR to 202311: https://github.com/sonic-net/sonic-mgmt/pull/13584