Duplicate MAC Addresses?

Unanswered Question
Jul 9th, 2010
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Hi Folks,

Has anyone experienced duplicate MAC addresss issues with the UCS-B/6120 connected to a 6500?  I'm seeing the following on my 6500:

6506#sh arp | inc 0025    
Internet             0   0025.b501.0005  ARPA   Vlan210
Internet             4   0025.b501.0007  ARPA   Vlan210
Internet            51   0025.b501.0005  ARPA   Vlan210

I checked my profiles and they appear to each have a uniquely assigned MAC address.   The correct entry is and the 6120 should be replying with 0025.b501.006 for 

Anyone got any thoughts on how to correct this issue?

Take Care


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cpaggen Sun, 07/11/2010 - 04:05
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There is nothing wrong with what you're seeing. It's acceptable to have N IP addresses resolve to 1 MAC

address. That is the case with secondary IP addresses for instance, Proxy-ARPing, "plumb" interfaces, etc.


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