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Configuring SPAN and RSPAN
To remove a source port or VLAN from the SPAN session, use the no monitor session session_number
source {interface interface-id | vlan vlan-id} global configuration command. To remove the RSPAN
VLAN from the session, use the no monitor session session_number destination remote vlan vlan-id.
This example shows how to remove any existing RSPAN configuration for session 1, configure RSPAN
session 1 to monitor multiple source interfaces, and configure the destination as RSPAN VLAN 901.
Switch(config)# no monitor session 1
Switch(config)# monitor session 1 source interface gigabitethernet1/0/1 tx
Switch(config)# monitor session 1 source interface gigabitethernet1/0/2 rx
Switch(config)# monitor session 1 source interface port-channel 12
Switch(config)# monitor session 1 destination remote vlan 901
Switch(config)# end
Creating an RSPAN Destination Session
You configure the RSPAN destination session on a different switch or switch stack; that is, not the switch
or switch stack on which the source session was configured.
Beginning in privileged EXEC mode, follow these steps to define the RSPAN VLAN on that switch, to
create an RSPAN destination session, and to specify the source RSPAN VLAN and the destination port:
Command
Step 1
configure terminal
Step 2
vlan vlan-id
Step 3
remote-span
Step 4
exit
Step 5
no monitor session {session_number | all |
local | remote}
Step 6
monitor session session_number source
remote vlan vlan-id
Catalyst 3750 Switch Software Configuration Guide
27-20
Purpose
Enter global configuration mode.
Enter the VLAN ID of the RSPAN VLAN created from the source
switch, and enter VLAN configuration mode.
Note
If both switches are participating in VTP and the RSPAN
VLAN ID is from 2 to 1005, Steps 2 through 4 are not
required because the RSPAN VLAN ID is propagated
through the VTP network.
Identify the VLAN as the RSPAN VLAN.
Return to global configuration mode.
Remove any existing RSPAN configuration for the session.
For session_number, the range is from 1 to 66.
Specify all to remove all RSPAN sessions, local to remove all local
sessions, or remote to remove all remote SPAN sessions.
Specify the RSPAN session and the source RSPAN VLAN.
For session_number, the range is from 1 to 66.
For vlan-id, specify the source RSPAN VLAN to monitor.
Chapter 27
Configuring SPAN and RSPAN
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