Cisco Systems 3560 Manual De Usuario
28-11
Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Chapter 28 Configuring SPAN and RSPAN
Configuring SPAN and RSPAN
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On Catalyst 3560-24PS and 3560-48PS switches, egress SPAN routed packets (both unicast and
multicast) show the incorrect source MAC address. For local SPAN packets with native
encapsulation on the destination port, the packet shows the MAC address of VLAN 1. This problem
does not appear with local SPAN when the encapsulation replicate option is used. This limitation
does not apply to bridged packets. The workaround is to use the encapsulate replicate keywords in
the monitor session global configuration command.
multicast) show the incorrect source MAC address. For local SPAN packets with native
encapsulation on the destination port, the packet shows the MAC address of VLAN 1. This problem
does not appear with local SPAN when the encapsulation replicate option is used. This limitation
does not apply to bridged packets. The workaround is to use the encapsulate replicate keywords in
the monitor session global configuration command.
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:
(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}
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.
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]
{interface interface-id | vlan vlan-id} [, | -]
[both | rx | tx]
Specify the SPAN session and the source port (monitored port).
For session_number, the range is 1 to 66.
For interface-id, specify the source port or source VLAN to monitor.
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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). Valid
port-channel numbers are 1 to 48.
interfaces include physical interfaces and port-channel logical
interfaces (port-channel port-channel-number). Valid
port-channel numbers are 1 to 48.
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For vlan-id, specify the source VLAN to monitor. The range is 1
to 4094 (excluding the RSPAN VLAN).
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.
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.
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 SPAN monitors both sent and received
traffic.
specify a traffic direction, the SPAN monitors both sent and received
traffic.
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both—Monitor both received and sent traffic. This is the
default.
default.
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rx—Monitor received traffic.
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tx—Monitor sent traffic.
Note
You can use the monitor session session_number source
command multiple times to configure multiple source ports.
command multiple times to configure multiple source ports.