Three Devices with Same MAC

[johnoliphant1]

I have three new SiriusXM devices that were giving me trouble a couple weeks ago. Turns out the root of the problem is that all three have the same MAC address. Amazing, but true. 76c2.5e30.1599.

I have a feeling I've given their engineering/manufacturing staff a big headache by discovering this, as they likely have a warehouse full of these things, all with the same MAC. Not my problem, but it would be fun to watch them discover what's going on. haha

But I digress...I don't think they have a solution yet, but I'd like to use the devices anyway, if possible. They are Internet-based XMSirius radios. They all worked when I connected them to the same switch, but the log was getting flushed several times a day with MAC flapping errors every few seconds. We tried separate vlans, but that doesn't work.

Any ideas on how to do something that we shouldn't need to do? :)

-John

[Madhukrishnan Gopinathan Nair]

Hi John,

Is your question how to do away with the mac flap notifications. The switch is giving you its best possible help by telling you that there is a problem.  But if you still want to get rid of it, you may try the following

(config)#no mac address-table notification mac-move

But again as a best practice i don't recommed to continue use these devices since it can some time cause issues in your network, since it keeps the cpu busy.

Hope this helps and rate my post if it is found to be useful.

Thanks,

Madhu.