Enable Port Mirroring on Cisco
1 . Configure ports that should be monitored (Ports 0/15 to 0/17 with 0/19 are to be monitored) :
WS-C3560-24TS#conf t WS-C3560-24TS(config)#monitor session 1 source interface FastEthernet0/15 - 17 , FastEthernet0/19 bothNote The above commands will monitor both inbound and outbound traffics for interfaces 15 to 17 with 19.
2 . Enable mirroring where the probe is connected to port 0/18 :
WS-C3560-24TS(config)#monitor session 1 destination interface FastEthernet 0/18
3 . If you assign port 18 as the monitoring port and configure the switch to monitor ports 15 – 17 and 19, show monitor displays the following :
WS-C3560-24TS# sh monitor Session 1 --------- Type : Local Session Source Ports : Both : Fa0/15-17,Fa0/19 Destination Ports : Fa0/18 Encapsulation : Native Ingress : Disabled