zhenggen-xu

retest this please

Let's split this PR to two parts, one is to handle overlapping case for same or different interfaces. The other is to let the link local messages going to swss...

retest this please

Any other PR(s) depending on this PR for showing QSFP-DD DOM information? Can you add the test results for that info?

> > Any other PR(s) depending on this PR for showing QSFP-DD DOM information? Can you add the test results for that info? > > @zhenggen-xu , I think there...

> > > > Any other PR(s) depending on this PR for showing QSFP-DD DOM information? Can you add the test results for that info? > > > > >...

Did you make any changes other than https://github.com/Azure/sonic-platform-common/pull/101? If not, we should cherry-pick that into 201811 without a new PR.

What is the impact without this patch?

Please update your test results after the last change.

> > Please update your test results after the last change. > > [DPB_UT.txt](https://github.com/sonic-net/sonic-utilities/files/9999458/DPB_UT.txt) Please update the PR description `How to verify it` field directly since the old one is...