set cable length to 1m for backplane ports

[zhixzhu]

Signed-off-by: Zhixin Zhu zhixzhu@cisco.com

Why I did it

backplane ports cable length need to be specified.

How I did it

separated handling for the specific port name.

How to verify it

Used "sonic-cfggen" to generate buffer config, and verified cable length of backplane ports is 1m, other ports default length.

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
  --> This is required for T2.
• 202211

Description for the changelog

Ensure to add label/tag for the feature raised. example - PR#2174 under sonic-utilities repo. where, Generic Config and Update feature has been labelled as GCU.

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[zhixzhu]

@lguohan There is 1 workflow awaiting approval, could you help approve it?

[zhixzhu]

/AzurePipelines run Azure.sonic-buildimage

[azure-pipelines]

Commenter does not have sufficient privileges for PR 13572 in repo sonic-net/sonic-buildimage

[zhixzhu]

@lguohan There is 1 workflow awaiting approval, could you help approve it?
The failure happened when running script test_pretest.py, changing the cable length of backplane ports should not have any impact on it, could you help rerun the test? I don't have privilege to do rerun.

[zhixzhu]

@yxieca @lguohan There is 1 workflow awaiting approval, could you help approve it? And rerun the pipeline?

[gechiang]

/azp run

[azure-pipelines]

Commenter does not have sufficient privileges for PR 13572 in repo sonic-net/sonic-buildimage

[zhixzhu]

The failure is rsyslogd restart error:
"cmd": "docker exec -i teamd0 supervisorctl restart rsyslogd", "rc": 7, "stderr": "", "stderr_lines": [], "stdout": "rsyslogd: ERROR (not running)\nrsyslogd: ERROR (spawn error)\n"

Change cable length should not have any impact on it.

@gechiang Could you help run the pipeline again?

[lguohan]

why no unit test added for this case?

[lguohan]

@zhixzhu

[zhixzhu]

why no unit test added for this case?

@lguohan To render buffer template, it requires minigraph, device/vendor/platform/hwsku/, there is no such directory and files for vendor cisco, and the change here is for cisco specific backplane interface name "Ethernet-BPxxx", so can't add UT for it.
cisco hwsku files are in seperate repo platform-cisco-8000 which is not open sourced.

I had verified the change locally, used "sonic-cfggen" to generate buffer config, and verified cable length of backplane ports is 1m, other ports default length.

[zhixzhu]

@abdosi @lguohan I have updated the default cable length of internal links to 5m and added UT. Please help review again, thanks.

[abdosi]

LGTM.

[abdosi]

@rlhui please help merge this.