The way spanning tree works to determine the root bridge it chooses the
lowest MAC address. It looks like your 2500 is choosing a MAC address
randomly to ensure it can participate in this process properly.
andy
On Mon, 11 Dec 2000, Hubert Pun wrote:
> Why does it have the following if I have my bridge on my C2500 during
> the boot up process? and where is this MAC address from?
>
>
>------------------------------------------------------------------------------------------------------------------
>
> Note: A random Spanning Tree Bridge Identifier address of 0000.0c00.b138
> has been chosen for Bridge Group 1 since there is no mac address
> associated with the selected interface.
>
> Ensure that this address is unique.
>
>
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