Port mirroring on Cisco Catalyst 3560 Series
Posted on 2009-03-31
I have a Cisco Catalyst 3560 Series switch on which I want to set up port mirroring (SPAN) so ALL traffic from all ports on the switch is mirrored onto one dedicated port so I can then plug in a hardware/software based network performance monitor into that port to analyze what's going on on the network. I have installed the Cisco Network Assistant software installed to connect to the switch can find the SPAN settings but cannot figure out how to copy the traffic from ALL ports to one port.
The background for this is that we have VoIP phones on this network and have recently started having problems with call quality and jitter on the line and believe something on the network is generating some traffic which is causing this. To this end, I want to use a network performance monitor like Orion (Solar Winds) or Fluke Etherscope II to see what's happening on the network but obviously this will require the Fluke or Orion to be plugged into a port that is receiving all traffic going through the switch.
Any help will be appreciated.