[c-nsp] where is mac address for a 1720?

Tom Storey tom at snnap.net
Wed May 11 10:26:55 EDT 2011


I would have thought it would appear somewhere really obvious like in a
"show interface". The "bia" (burned in address) I would have thought should
come from the MAC controller of the interface itself, not from a location
stored elsewhere on the router...?


On 10 May 2011 18:10, Antonio Querubin <tony at lavanauts.org> wrote:

> I've had to reset the cookie for a Cisco 1720 which was failing to boot up
> due to a checksum failure.  Apparently the cookie contents were completely
> lost.  After resetting the cookie to defaults, it now boots up but because I
> was unable to locate the MAC address, it's booting up with a MAC of
> 0000.0000.0000.  Although I can set the MAC to some random set of bits, I'd
> like to restore the original MAC but can't seem to find it even after
> popping the cover off.  I'm probably not looking in the right place.  Is the
> MAC not printed anywhere on the device?  A google search doesn't turn up any
> hints of where it might be.
>
> Antonio Querubin
> e-mail:  tony at lavanauts.org
> xmpp:  antonioquerubin at gmail.com
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