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Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
OL-12247-04
Chapter 30 Configuring SPAN and RSPAN
Configuring SPAN and RSPAN
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 gigabitethernet1/0/1
Switch(config)#
monitor session 1 destination interface gigabitethernet1/0/2
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 gigabitethernet1/0/1
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 gigabitethernet1/0/1 rx
The monitoring of traffic received on port 1 is disabled, but traffic sent from this port continues to be
monitored.
Step 4
monitor session
session_number
destination
{
interface
interface-id
[, | -]
[
encapsulation replicate]}
Specify the SPAN session and the destination port (monitoring port).
For
session_number
, specify the session number entered in step 3.
Note
For local SPAN, you must use the same session number for
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.
Step 5
end
Return to privileged EXEC mode.
Step 6
show monitor
[
session
session_number
]
show running-config
Verify the configuration.
Step 7
copy running-config startup-config
(Optional) Save the configuration in the configuration file.
Command
Purpose
