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Multiple Cisco Switches

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by jt9

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How can I configure 3 cisco switches connected via crossover cables to show only the mac addresses that belong to say switch1, switch2 and switch3? Currently doing a show arp on switch 1 gives the mac address of the ip address for the port on the switch 2 where it is plugged in.

These are Cisco 3560's.

2 replies

by fregeus

... is to use the " | exc " sub-command.

In your case, you could say " sh arp | exc 'mac'" where the 'mac' is the 4 last number of the uplink mac address. Unfortunately, you cannot do it twice, so for the middle switch, you will still see the MAC response for the opposing switch (if you block 1 you will see 3, if you block 3 you will see 1).

To my knowledge, there is no other way to do this short of disconnecting the switch.

TCB

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