Duplicated MACs on different VLANs on Same switched infra!

[Yusuf_Kabbara]

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

[Mrxlazuardin]

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,