Cisco Systems 3750E manual Configuring Rspan, Rspan Configuration Guidelines, Be a Vlan, 30-16

Chapter 30 Configuring SPAN and RSPAN

Configuring SPAN and RSPAN

	Command	Purpose
Step 5
	monitor session session_number	Specify the SPAN session and the destination port (monitoring port).
	destination {interface interface-id[, -]	For session_number, specify the session number entered in Step 3.
	[encapsulation replicate]}
		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).
Step 6
	end	Return to privileged EXEC mode.
Step 7
	show monitor [session session_number]	Verify the configuration.
	show running-config
Step 8
	copy running-config startup-config	(Optional) Save the configuration in the configuration file.

To monitor all VLANs on the trunk port, use the no monitor session session_number filter global configuration command.

This example shows how to remove any existing configuration on SPAN session 2, configure SPAN session 2 to monitor traffic received on Gigabit Ethernet trunk port 2, and send traffic for only VLANs 1 through 5 and VLAN 9 to destination Gigabit Ethernet port 1.

Switch(config)# no monitor session 2

Switch(config)# monitor session 2 source interface gigabitethernet1/0/2 rx

Switch(config)# monitor session 2 filter vlan 1 - 5 , 9

Switch(config)# monitor session 2 destination interface gigabitethernet1/0/1

Switch(config)# end

Configuring RSPAN

These sections contain this configuration information:

•RSPAN Configuration Guidelines, page 30-16

•Configuring a VLAN as an RSPAN VLAN, page 30-17

•Creating an RSPAN Source Session, page 30-18

•Creating an RSPAN Destination Session, page 30-19

•Creating an RSPAN Destination Session and Configuring Incoming Traffic, page 30-20

•Specifying VLANs to Filter, page 30-22

RSPAN Configuration Guidelines

Follow these guidelines when configuring RSPAN:

•All the items in the “SPAN Configuration Guidelines” section on page 30-11apply to RSPAN.

•As RSPAN VLANs have special properties, you should reserve a few VLANs across your network for use as RSPAN VLANs; do not assign access ports to these VLANs.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
30-16	OL-9775-02