Cisco Catalyst 3550 Series User Manual

24-19
Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 24 Configuring SPAN and RSPAN
Configuring RSPAN
This example shows how to configure VLAN 901 as the source remote VLAN and port 5 as the
destination interface:
Switch(config)# monitor session 1 source remote vlan 901
Switch(config)# monitor session 1 destination interface fastEthernet0/5
Switch(config)# end
Creating an RSPAN Destination Session and Enabling Ingress Traffic
Beginning in privileged EXEC mode, follow these steps to create an RSPAN destination session, to
specify the source RSPAN VLAN, and to enable ingress traffic on the destination port for a network
security device (such as a Cisco IDS Sensor Appliance):
Step 5
show monitor [session session_number] Verify your entries.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
monitor session session_number source
remote vlan vlan-id
Specify the RSPAN session and the source RSPAN VLAN.
For session_number, specify 1 or 2.
For vlan-id, specify the source RSPAN VLAN to monitor.
Step 3
monitor session session_number
destination interface interface-id
[encapsulation {dot1q [ingress vlan vlan id]
| ISL [ingress]} | ingress vlan vlan id]
Specify the RSPAN session, the destination port, the packet
encapsulation, and the ingress VLAN.
For session_number, specify 1 or 2.
For interface-id, specify the destination port. Valid interfaces include
physical interfaces.
(Optional) Specify the encapsulation of the packets transmitted on
the RSPAN destination port. If no encapsulation is specified, all
transmitted packets will be sent in native format (untagged).
• Enter encapsulation dot1q to send native VLAN packets
untagged and all other VLAN tx packets tagged dot1q.
• Enter encapsulation isl to send all tx packets encapsulated using
ISL.
(Optional) Specify whether forwarding is enabled for ingress traffic
on the SPAN destination port.
• For native (untagged) and dot1q encapsulation, specify ingress
vlan vlan id to enable ingress forwarding with vlan id as the
native VLAN; vlan id will also be used as the native VLAN for
transmitted packets.
• Specify ingress to enable ingress forwarding when using ISL
encapsulation.
Step 4
end Return to privileged EXEC mode.

Cisco Catalyst 3550 Series Specifications

General

Form Factor	Rack-mountable
Manageable	Yes
RAM	64 MB
Device Type	Switch
MAC Address Table Size	12000 entries
Routing Protocol	RIP
Features	VLAN support
Power Supply	AC 120/230 V (50/60 Hz)
Ports	24 or 48 x 10/100Base-TX, 1 x GBIC, 2 x 10/100/1000Base-T
Operating Temperature	32 to 113°F (0 to 45°C)