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Cisco 2950 - Catalyst Switch User Manual

Cisco 2950 - Catalyst Switch
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25-8
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-10
Chapter 25 Configuring SPAN and RSPAN
Configuring SPAN
When SPAN is enabled, configuration changes have these results:
If you change the VLAN configuration of a destination port, the change is not effective until
SPAN is disabled.
If you disable all source ports or the destination port, the SPAN function stops until both a
source and the destination port are enabled.
Creating a SPAN Session and Specifying Ports to Monitor
Beginning in privileged EXEC mode, follow these steps to create a SPAN session and specify the source
(monitored) and destination (monitoring) ports:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
no monitor session {session_number | all |
local | remote}
Clear any existing SPAN configuration for the session.
For session_number, specify 1.
Specify all to remove all SPAN sessions, local to remove all local
sessions, or remote to remove all remote SPAN sessions.
Step 3
monitor session session_number source
interface interface-id [, | -] [both | rx | tx]
Specify the SPAN session and the source port (monitored port).
For session_number, specify 1.
For interface-id, specify the source port to monitor. Valid interfaces
include physical interfaces and port-channel logical interfaces
(port-channel port-channel-number).
(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) Specify the direction of traffic to monitor. If you do not
specify a traffic direction, the source interface sends both sent and
received traffic.
bothMonitor both received and sent traffic.
rxMonitor received traffic.
txMonitor sent traffic.
Step 4
monitor session session_number
destination interface interface-id
[encapsulation {dot1q}]
Specify the SPAN session and the destination port (monitoring port).
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.
dot1qUse 802.1Q encapsulation.
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.

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Cisco 2950 - Catalyst Switch Specifications

General IconGeneral
Forwarding Rate6.6 Mpps
Jumbo Frame SupportNo
Weight8.8 lbs (4 kg)
RAM16 MB
Flash Memory8 MB
ManageableYes
Form FactorRack-mountable
Ports24 Ethernet 10/100 ports
Uplink Ports2 x 10/100/1000Base-T ports
VLANs250
MAC Address Table Size8000
Power Supply100-240 VAC, 50-60 Hz
Dimensions4.4 cm x 44.5 cm x 24.2 cm
Operating Temperature0 to 40 °C (32 to 104 °F)
Storage Temperature-25 to 70 °C (-13 to 158 °F)
Operating Humidity10% to 85% (non-condensing)
Storage Humidity5% to 95% (non-condensing)

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