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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-10
Chapter 25 Configuring SPAN and RSPAN
Configuring SPAN
This example shows how to configure the destination port for ingress traffic on VLAN 5 by using a
security device that does not support 802.1Q encapsulation.
Switch(config)# monitor session 1 destination interface fastethernet0/5 ingress vlan 5
This example shows how to configure the destination port for ingress traffic on VLAN 5 by using a
security device that supports 802.1Q encapsulation.
Switch(config)# monitor session 1 destination interface fastethernet0/5 encapsulation
dot1q ingress vlan 5
This example shows how to disable ingress traffic forwarding on the destination port.
Switch(config)# monitor session 1 destination interface fastethernet0/5 encapsulation
dot1q
Step 4
monitor session session_number
destination interface interface-id
[encapsulation {dot1q}] [ingress vlan
vlan id]
Specify the SPAN session, the destination port (monitoring port), the
packet encapsulation, and the ingress VLAN.
For session_number, specify 1.
For interface-id, specify the destination port. Valid interfaces include
physical interfaces.
(Optional) Specify the encapsulation header for outgoing packets. If
not specified, packets are sent in native form.
• dot1q—Use 802.1Q encapsulation.
(Optional) Enter ingress vlan vlan id to enable ingress forwarding
and specify a default VLAN.
Step 5
end Return to privileged EXEC mode.
Step 6
show monitor [session session_number] Verify your entries.
Step 7
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose