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Webcast-Catalyst9k
New Member

MAC address problem on router

This can't be right, it's on our 2951. I don't have another router to compare with, but shouldn't g0/1 have the same MAC listed for it's MAC and the bia?

GigabitEthernet0/0 is up, line protocol is up

  Hardware is PQ3_TSEC, address is f866.f2dd.8820 (bia f866.f2dd.8820)

GigabitEthernet0/1 is down, line protocol is down

  Hardware is PQ3_TSEC, address is f866.f2dd.8820 (bia f866.f2dd.8821)

It's connected to a switch with a Port-channel to both the above ports on the router and the switch is logging MAC flapping errors with the f866.f2dd.8820 MAC as the source.

2 REPLIES
Purple

MAC address problem on router

hi,

yes it should unless someone changed the MAC address with the interface command mac-address xxxx.xxxx.xxxx

To verify just do sh run interface G0/1

Regards.

Alain

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New Member

MAC address problem on router

Thanks for the post, it seems the router has a ROM problem in the controller for the port then.

interface GigabitEthernet0/1

description Etherchannel link, 2 of 2

no ip address

duplex auto

speed auto

channel-group 12

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