Monitoring and Analyzing Switch Operation

Traffic Mirroring

Traffic Selection Options

To configure traffic mirroring, you must specify the source interface, traffic direction, and criteria to be used to select the traffic to be mirrored using the following options:

Interface type

• Port and/or trunk

• Switch (global configuration level)

Mirroring-Source Restrictions

In a mirroring session, you can configure any of the following sources of mirrored traffic:

Multiple port and trunk interfaces

 

Selecting All Inbound/Outbound Traffic to Mirror

 

Use the commands in this section to configure all inbound and/or outbound

 

traffic on specified port or trunk interfaces for a local mirroring session. For

 

an example of a mirroring configuration that selects all inbound or outbound

 

traffic on a monitored interface, see:

 

“Local Mirroring Using Traffic-Direction Criteria” on page B-41

 

 

N o t e

If you have already configured session 1 with a local destination (as described

 

in “2. Configure a Mirroring Session on the Source Switch” on page B-35),you

 

can enter the vlan < vid > monitor or interface < port > monitor command without

 

additional parameters for traffic-selection criteria and session number to

 

configure mirroring for all inbound and outbound traffic on the specified port

 

interfaces in session 1 with the preconfigured destination.

 

Port or Trunk Interface with Traffic Direction as the Selection

 

 

Criteria. Use this command when the direction of traffic movement on the

 

port or trunk interface defines the criteria for mirroring traffic.

 

Syntax: [no] interface < eth-port-list> monitor all < in out both >

B-36