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Configuring SPAN and RSPAN
Command
Step 4
monitor session session_number
destination {interface interface-id [, | -]
[encapsulation replicate]}
Step 5
end
Step 6
show monitor [session session_number]
show running-config
Step 7
copy running-config startup-config
To delete a SPAN session, use the no monitor session session_number global configuration command.
To remove a source or destination port or VLAN from the SPAN session, use the no monitor session
session_number source {interface interface-id | vlan vlan-id} global configuration command or the no
monitor session session_number destination interface interface-id global configuration command. For
destination interfaces, the encapsulation options are ignored with the no form of the command.
This example shows how to set up SPAN session 1 for monitoring source port traffic to a destination
port. First, any existing SPAN configuration for session 1 is deleted, and then bidirectional traffic is
mirrored from source Gigabit Ethernet port 1 to destination Gigabit Ethernet port 2, retaining the
encapsulation method.
Switch(config)# no monitor session 1
Switch(config)# monitor session 1 source interface gigabitethernet0/1
Switch(config)# monitor session 1 destination interface gigabitethernet0/2
encapsulation replicate
Switch(config)# end
This example shows how to remove port 1 as a SPAN source for SPAN session 1:
Switch(config)# no monitor session 1 source interface gigabitethernet0/1
Switch(config)# end
This example shows how to disable received traffic monitoring on port 1, which was configured for
bidirectional monitoring:
Switch(config)# no monitor session 1 source interface gigabitethernet0/1 rx
The monitoring of traffic received on port 1 is disabled, but traffic sent from this port continues to be
monitored.
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
27-12
Purpose
Specify the SPAN session and the destination port (monitoring port).
For session_number, specify the session number entered in step 3.
For local SPAN, you must use the same session number for
Note
the source and destination interfaces.
For interface-id, specify the destination port. The destination
interface must be a physical port; it cannot be an EtherChannel, and
it cannot be a VLAN.
(Optional) [, | -] Specify a series or range of interfaces. Enter a space
before and after the comma; enter a space before and after the
hyphen.
(Optional) Enter encapsulation replicate to specify that the
destination interface replicates the source interface encapsulation
method. If not selected, the default is to send packets in native form
(untagged).
Note
You can use monitor session session_number destination
command multiple times to configure multiple destination
ports.
Return to privileged EXEC mode.
Verify the configuration.
(Optional) Save the configuration in the configuration file.
Chapter 27
Configuring SPAN and RSPAN
OL-8915-03
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