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Duplicated MACs on different VLANs on Same switched infra!

Duplicated MACs on different VLANs on Same switched infra!

Yusuf_Kabbara
New Contributor II
My network includes more than hundred of switches in multiple-ring design ..
when issuing: show iparp
I am finding rejected IP .. I believe it doesn't has anything to do with the duplication ...
But I wanna be sure that I have no duplicated MACs on my network so...

- Does duplicated MACs on different VLANs on Same switched infra cause problems?
- How to find duplicated MACs on different VLANs on Same switched infra?

Thanks
Yusuf
5 REPLIES 5

Mrxlazuardin
New Contributor III
Hi Yusuf, I think it will give you ARP poison like problem since FDB maps each MAC to a port. Actually, I haven't tried that case. You should test it on separate switch to make sure. Best regards,
GTM-P2G8KFN