Name: Cisco 2950 - Catalyst Switch
Brand: Cisco
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25-10

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

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Cisco 2950 - Catalyst Switch Specifications

General