Multiple MAC Addresses on Access Port

Unanswered Question
Jun 30th, 2010

We are trying to determine a way that we could easily view the mac table and only display the ports or macs that have multiple mac address attached to them.  We have a VOIP intiative that we are working on but we need to make sure there are no rogue hubs or switches attached at the access layer. Any guidance would be appreciated.

I have this problem too.
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John Blakley Wed, 06/30/2010 - 09:10

I'm not sure if there's an easier way to do it, but here are a couple of options.

If you know what port you're concerned with, run:

sh mac address-table | inc


sh mac address-table interface g3/0/27



vladimirsaltao Wed, 06/30/2010 - 09:12

Best way, in my opinion, is to create a perl script from scratch.

Second best way is to use one that is already available like this one :

From the page:  "It will scan your network switches and provide information to help identify the devices attached to each port."


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