[c-nsp] same mac address on two linecards on 7600

Oliver Boehmer (oboehmer) oboehmer at cisco.com
Mon Nov 10 00:52:10 EST 2008


Vikas Sharma <mailto:vikassharmas at gmail.com> wrote on Monday, November
10, 2008 05:35:

> Hi,
> 
> in 7600 and 6500 router I can see both interfaces have the sme mac
> address. Ideally it should be different. Can anyone explain me? Or
> can I use (hardcode) different mac address? what will be the impact?  

All L3 interfaces (both routed ports and SVIs) use the same MAC address
on this platform, see
http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note
09186a00801c9b4e.shtml. There is nothing wrong with this, all of the
interfaces are (by definition) in different broadcast domains. You can
change the mac if you want/need (using mac-address interface command) on
the Sup720.. 

	oli


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