No matter what, you won't have to check all the switches. Just check
the central switch like this:
show mac-address-table address ffff.ffff.ffff (insert your mac here)
and then if that is a downlink port to another switch, check which
switch is connected to that port with the same command. You could
script this, some things that might save you time would be using the
description field for each downlink to say which switch is connected
to it (or use a static table in your program), and using Expect for
the interaction would make your life very easy.
Jon Mitchell
Loudcloud, Inc.
*not speaking for my employer*
John Chang wrote:
>
> We have 11 3500 XL series switches. 10 are connected to 1 switch. There
> is only 1 VLAN.
>
> Basic diagram:
> switches
> | | | | |
> | Switch
> | | | | |
> switches
>
> Is there a tool out there that will easily tell me which port a particular
> MAC address is connected to at any given time? Preferable something I can
> do a simple search for the MAC address and it will show me the port.
>
> The problem I'm having is that we have a DHCP server and I hate all these
> BAD_ADDRESS. When I ping the IP address it is live so someone is manually
> entering the IP address. I don't want to go through all the switches to
> find the MAC address since it will be too time consuming.
>
> Thanks.
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