(CS) IOS Conocer interfaz de una MAC ó IP conocida.

Switch#show arp | include 0000.1111.bbbb
Internet 11.222.33.55 0 0000.1111.bbbb ARPA Vlan55

Switch#show arp | include 11.222.33.55
Internet 11.222.33.55 1 0000.1111.bbbb ARPA Vlan55

Switch#show mac-address-table address 0000.1111.bbbb
Mac Address Table
-------------------------------------------

Vlan Mac Address Type Ports
---- ----------- -------- -----
55 0000.1111.bbbb DYNAMIC Gi1/0/5
Total Mac Addresses for this criterion: 1