Troubleshooting port-mirroring

Configuring port mirroring from interface 0/2 to 0/1.

evice(config)# monitor session 1                 
device(config-session-1)# source ethernet 0/2 destination ethernet 0/1 direction rx

Display the MAC counters on the ingress interface:

device# show interface ethernet 0/2  
Ethernet 0/2 is up, line protocol is up (connected)
Receive Statistics:
    1000 packets, 128000 bytes
    Unicasts: 1000, Multicasts: 0, Broadcasts: 0
...
(Output is truncated)

Display the MAC counters on the mirrored interface:

device# show interface ethernet 0/1 (Output is trimmed for brevity)
Ethernet 0/1 is up, line protocol is up (connected)
Transmit Statistics:
    1000 packets, 128000 bytes
    Unicasts: 1000, Multicasts: 0, Broadcasts: 0
    Underruns: 0
...
(Output is truncated)