Configure Cisco SPAN

Switched Port Analyzer (SPAN) is a port monitoring feature found in Cisco Catalyst switches that selects network traffic for analysis.

SPAN

switch1(config)# monitor session 1 source interface fa0/10
switch1(config)# monitor session 1 destination interface fa0/1

RSPAN

switch1(config)# vlan 150
switch1(config-vlan)# remote-span
switch1(config)# monitor session 1 source interface fa0/1
switch1(config)# monitor session 1 destination remote vlan 150
//it might be necessary to configure a reflector-port if the switch is older
switch2(config)# vlan 150
switch2(config-vlan)# remote-span
switch2(config)# monitor session 1 source remote vlan 150
switch2(config)# monitor session 1 destination interface fa0/1

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