SPAN for port or VLAN monitoring

[jeff6strings]

We have a 3550XL switch with software verions 12.1(22) and the gigabit interface is a VLAN trunk to the core switch. All ports on this switch are in the same VLAN (VLAN 100) including the destination (monitoring) port. I would like to monitor all the traffic from all the ports on this switch or on the VLAN not really sure which. After reading the article below on SPAN i'm confused as to which commands I should use to in order to monitor the traffic on all the ports or just the VLAN;  the destination port is port f0/35. If it makes a difference I'm not interested in the tagging information.

I greatly appreciate any assistance with which commands I should use to accomplist the monitoring.

Jeff

http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_19_ea1/configuration/guide/swspan.html#wp1078789

[Mohamed Sobair · Accepted solution]

Hello,

You can use the following 2 commands:

monitor session 1 source vlan 100 both

monitor session 1 destination interface f0/35

This will monitor all traffic (incoming/outgoing) sourced and destined for Vlan 100.

Regards,

Mohamed

[jeff6strings]

Mohamed,

Thank you for the reply. This mornining I will try what you suggested and post the results.

jeff