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- Port Mirroring on a Cisco 3550 Switch
Port Mirroring on a Cisco 3550 Switch
Just for reference…
Source port(s):
Switch# config t Switch(config)# monitor session 1 source interface fastethernet 0/1 Switch(config)# monitor session 1 source interface fastethernet 0/2 Switch(config)# monitor session 1 source interface fastethernet 0/3 Switch(config)# monitor session 1 source interface fastethernet 0/4 (however many you want to monitor)
Destination port:
Switch(config)# monitor session 1 destination interface fastethernet 0/24
…then exit and:
Switch# show monitor session 1
It’ll show you what all ports are being monitored (sources) and what port to sniff on (destination). Fin.: