Cisco Catalyst 2950 Command Reference

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Catalyst 2950 and Catalyst 2955 Switch Command Reference
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Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
monitor session
If ingress forwarding is enabled, you can use the SPAN destination port to inject traffic from a network
security device. For example, if you connect a Cisco Intrusion Detection System (IDS) Sensor Appliance
to a destination port, the IDS device can send TCP Reset packets to close down the TCP session of a
suspected attacker.
Examples This example shows how to create SPAN session 1 to monitor both sent and received traffic on source
port 1 on destination port 8:
Switch(config)# monitor session 1 source interface fastethernet0/1 both
Switch(config)# monitor session 1 destination interface fastethernet0/8
This example shows how to delete a destination port from an existing SPAN session:
Switch(config)# no monitor session 2 destination fastethernet0/4
This example shows how to configure RSPAN session 1 to monitor multiple source interfaces and to
configure the destination RSPAN VLAN and the reflector-port:
Switch(config)# monitor session 1 source interface fastethernet0/10 tx
Switch(config)# monitor session 1 source interface fastethernet0/2 rx
Switch(config)# monitor session 1 source interface port-channel 102 rx
Switch(config)# monitor session 1 destination remote vlan 901 reflector-port
fastethernet0/1
Switch(config)# end
This example shows how to configure the destination port for ingress traffic on VLAN 5 by using a
security device that does not support IEEE 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 IEEE 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
You can verify your settings by entering the show monitor privileged EXEC command.
Related Commands Command Description
remote-span Configures an RSPAN VLAN in vlan configuration mode.
show monitor Displays SPAN and RSPAN session information.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz