Monitoring and Analyzing Switch Operation

Traffic Mirroring

C o n f i g u r a t i o n N o t e s

Using the CLI, you can configure all mirroring options on a switch.

Using the Menu or Web interface, you can configure session 1 local mirroring for traffic in both directions on specified interfaces. (If session 1 has been already configured in the CLI for local mirroring for inbound-only or outbound -only traffic and you use the Menu or Web interface to modify the session 1 configuration, session 1 is automatically reconfigured to monitor both inbound and outbound traffic on the assigned interfaces. If session 1 has been configured in the CLI with a classifier-based mirroring policy, an error message is displayed if you try to use the Menu or Web interface to configure the session.)

You can use the CLI to configure sessions 1 to 4 for local mirroring in any combination, and override a Menu or Web interface-based configuration of session 1.

You can also use SNMP to configure sessions 1 to 4 for local mirroring in any combination, and override a Menu or Web interface-based configuration of session 1, except that SNMP cannot be used to configure a classifier-based mirroring policy.

Endpoint Switches and Intermediate Devices

The following restrictions apply to endpoint switches and intermediate devices in a network configured for traffic mirroring:

The exit port for a mirroring destination must be an individual port, and not a trunk, mesh or VLAN interface.

The switch mirrors traffic on static trunks, but not on dynamic LACP trunks.

The switch mirrors traffic at line rate. When mirroring multiple interfaces in networks with high traffic levels, it is possible to copy more traffic to a mirroring destination than the link supports. In this case, some mirrored traffic may not reach the destination. If you are mirroring a high traffic volume, distribute the load to multiple exit ports if possible.

B-28