Cisco Catalyst 3750 Software Configuration Manual page 397

Chapter 21 Configuring SPAN and RSPAN
This example shows how to remove any existing configuration on SPAN session 2, configure SPAN
session 2 to monitor received traffic on all ports belonging to VLANs 1 through 3, and send it to a
destination interface. The configuration is then modified to also monitor all traffic on all ports belonging
to VLAN 10.
Switch(config)# no monitor session 2
Switch(config)# monitor session 2 source vlan 1 - 3 rx
Switch(config)# monitor session 2 destination interface gigabitethernet1/0/2
Switch(config)# monitor session 2 source vlan 10
Switch(config)# end
Creating a Local SPAN Session and Configuring Ingress Traffic
Beginning in privileged EXEC mode, follow these steps to create a SPAN session, to specify the source
ports or VLANs and the destination ports, and to enable ingress traffic on the destination port for a
network security device (such as a Cisco IDS Sensor Appliance).
Refer to the
Note
related to ingress traffic.
Command
Step 1
configure terminal
Step 2 no monitor session {session_number | all |
local | remote}
Step 3 monitor session session_number source
{interface interface-id | vlan vlan-id} [, | -]
[both | rx | tx]
78-15870-01
"Creating a Local SPAN Session" section on page 21-11
Purpose
Enter global configuration mode.
Remove any existing SPAN configuration for the session.
Specify the SPAN session and the source port (monitored port).
for details about the keywords not
Catalyst 3750 Metro Switch Software Configuration Guide
Configuring SPAN and RSPAN
21-13