B-35
Monitoring and Analyzing Switch Operation
Traffic Mirroring
1. Determine the Mirroring Session and Destination
For a Local Mirroring Session. Determine the port number for the exit
port (such as A5, B10, etc.), then go to “3. Configure the Monitored Traffic in
a Mirror Session” on page B-35.
2. Configure a Mirroring Session on the Source Switch
To configure local mirroring, only a session number and exit port number are
required. See “Configuring a Source Switch in a Local Mirroring Session”
below for more information.
Configuring a Source Switch in a Local Mirroring Session. For a local
mirroring session, enter the mirror port command on the source switch to
configure an exit port on the same switch. To create the mirroring session,
use the information gathered in “1. Determine the Mirroring Session and
Destination” on page B-35.
Caution Configuring a switch with the traffic selection criteria and destination for a
given mirroring session starts traffic mirroring to that destination.
3. Configure the Monitored Traffic in a Mirror Session
This step configures one or more interfaces on a source switch with the traffic-
selection criteria to use to select the traffic to mirror in a specified session
configured in Step 3.
Syntax: mirror eth-port
This command assigns the exit port to use for the specified
mirroring session, and must be executed from the global
configuration level.
The no form of the command removes the mirroring session
and any mirroring source previously assigned to that
session. To preserve the session while deleting a mirroring
source assigned to it, refer to the no command descriptions
under “3. Configure the Monitored Traffic in a Mirror
Session” on page B-35.
