Cisco Catalyst 3750-E - Specifying Vlans to Filter

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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
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Chapter 30 Configuring SPAN and RSPAN
Configuring SPAN and RSPAN
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 gigabitethern
et1/0/1 tx
Switch(config)# monitor session 1 source interface gigabitethern
et1/0/2 rx
Switch(config)# monitor session 1 source interface port-channel
2
Switch(config)# monitor session 1 destination remote vlan 901
Switch(config)# end
On the Catalyst 3560E-12D switch, 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 gigabitethern
et0/1 tx
Switch(config)# monitor session 1 source interface gigabitethern
et0/2 rx
Switch(config)# monitor session 1 source interface port-channel
2
Switch(config)# monitor session 1 destination remote vlan 901 de
stination-port group b
Switch(config)# end
Specifying VLANs to Filter
Beginning in privileged EXEC mode, follow these steps to configure the RSPAN source session to limit
RSPAN source traffic to specific VLANs:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
no monitor session {session_number | all |
local | remote}
Remove any existing SPAN configuration for the session.
For sess
ion_number, the range is 1 to 66.
Specify al
l to remove all SPAN sessions, local to remove all local
sessions, or remote to remove all remote SPAN sessions.
Step 3
monitor session session_number source
interface interface-id
Specify the characteristics of the source port (monitored port) and
SPAN session.
For sess
ion_number, the range is 1 to 66. When entering this
command on the Catalyst 3560E-12D switch, you can only enter 1 for
the session_number.
For in
terface-id, specify the source port to monitor. The interface
specified must already be configured as a trunk port.
Step 4
monitor session session_number filter vlan
vlan-id [, | -]
Limit the SPAN source traffic to specific VLANs.
For sess
ion_number, enter the session number specified in step 3.
For vl
an-id, the range is 1 to 4094.
(Optional) Use a comma (,)
to specify a series of VLANs or use a
hyphen (-) to specify a range of VLANs. Enter a space before and after
the comma; enter a space before and after the hyphen.