Setting up SPAN

[RNF0528]

I am attempting to implement a Network Sniffer and configure our core to send all traffic to the sniffer as well. I am using

Switch(config)#monitor session 1 source vlan 5
Switch(config)#monitor session 1 destination fastethernet 0/3

Is this correct and if not should i try putting the switch port into promiscuous mode?

 

[vipergg]

Looks correct . If you are sending all traffic from a vlan then make sure the aggregate is not more than 100 meg as your destination port is 100 meg , anything higher than 100 meg will be dropped and not seen by the sniffer.