Switch - Find Switch by MAC

S1#show mac address-table address (1234.1234.1234)

S1#show interface status

S1#show cdp neighbors interface (fa0/1)

S1#show cdp neighbors interface (fa0/1) detail

S2#Same S1

S2#Same S1

S2#Same S1

S2#Same S1

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Find until it not trunk port