wenyiz2021

[UT] Add UT for chassis qos reload

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#### What I did This PR is adding unit testing for the scenario described in https://github.com/sonic-net/sonic-utilities/pull/3233 #### How I did it #### How to verify it #### Previous command output...

#### Description Issue: ``` $sudo config interface -n asic1 pfc priority Ethernet80 3 on Cannot find interface Ethernet80 $ sudo config interface -n asic0 pfc priority Ethernet80 3 on Cannot...

[config db] Trim garbage charactor in "DEVICE_METADATA" of config db

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This is to prevent a user error in ADO: 28004860 where there was an extra "\n" at the end of mac, in "DEVICE_METADATA" section.  #### What I did 1....

[enhancement] Missing support for "config interfaces startup all"

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#### Description currently there is no `all` option for `config interface startup`, we have to run the command link by link if want to start all at once. ## Steps...

CW2 LC link issue

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there are 2 links that are down/up. the following work around worked according to Nathan to disable low power mode: sudo config interface tran lpmode Ethernet104 disable sudo config interface...