Cisco Catalyst 3750-E - Page 736

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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-08
Chapter 30 Configuring SPAN and RSPAN
Configuring SPAN and RSPAN
Creating a Local SPAN Session
Beginning in privileged EXEC mode, follow these steps to create a SPAN session and specify the source
(monitored) ports or VLANs and the destination (monitoring) ports:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
no monitor session {session_number | all
| local | remote}
Remove any existing SPAN configuration for the session.
• For session_number, the range is 1 to 66.
• 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 | vlan vlan-id} [, |
-] [both | rx | tx]
Specify the SPAN session and the source port (monitored port).
For se
ssion_number, the range is 1 to 66. When entering this command
on the Catalyst 3560E-12D switch, you can only enter 1 for the
session_number.
For in
terface-id, specify the source port or source VLAN to monitor.
• For source interface-id, specify the source port to monitor. Valid
interfaces include physical interfaces and port-channel logical
interfaces (port-channel port-channel-number). Va li d
port-channel numbers are 1 to 48.
• For vlan-id, specify the source VLAN to monitor. The range is 1 to
4094 (excluding the RSPAN VLAN).
Note A single session can include multiple sources (ports or VLANs),
defined in a series of commands, but you cannot combine source
ports and source VLANs in one session.
(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
sp
ecify a traffic direction, the SPAN monitors both sent and received
traffic.
• both—Monitor both received and sent traffic. This is the default.
• rx—Monitor received traffic.
• tx—Monitor sent traffic.
Note You can use the monitor session session_number source
command multiple times to configure multiple source ports.