Finding MAC

[naqibsafi]

Hi Dear all,

i hope to be fine, pleas help me ho to fine MAC address in all switches which are connected in one LAN

for example IT office send me MAC he sad i don't the correct port in switch so you fine which port belong to this MAC Address .

thanks 

[Leo Laohoo]

sh mac

[Deepak Kumar · Accepted solution]

Hi,

Sw#sho mac address-table    ---> This command will show you full list of the all MAC address table:

1st-Floor#sho mac address-table address 0015.5d0a.5502  -------> It will show, where is a specific device connected on the switch or from where (uplink or downlink) switch receiving this mac address. Here Mac address 0015.5d0a.5502 must replace with required mac address.

Mac Address Table
-------------------------------------------

Vlan Mac Address Type Ports
---- ----------- -------- -----
1 0015.5d0a.5502 DYNAMIC Gi1/0/4
Total Mac Addresses for this criterion: 1

[hunnymonster]

Save yourself some typing too...

sh mac addr | i <last 4 octets of MAC>

example: looking for MAC 1213:4533:665a -> sh mac addr | i 665a

It's almost certain that you won't get two (or more) matches - in 20 years it's happened to me twice