Monitoring Interfaces

You can designate an interface to be a monitoring interface. This action forwards the interface's incoming and outgoing traffic to another interface and frees it for use with the Switch Port Analyzer (SPAN). You can then troubleshoot network problems by examining traffic on other interfaces or segments.

Any interface can be a monitoring interface, with these restrictions:

The SPAN window shows you which interface, if any, is being used as a monitoring interface. It also allows you to reassign monitoring to another interface. To open the SPAN window, choose Port > SPAN.


Related Web Links

"Configuring SPAN," Catalyst 2950 Desktop Switch Software Configuration Guide
"Configuring SPAN," Catalyst 3550 Multilayer Switch Software Configuration Guide