Remote-Span - Cisco Catalyst 3750 Command Reference Manual

Chapter 2 Catalyst 3750 Switch Cisco IOS Commands

remote-span

Use the remote-span VLAN configuration command on the switch stack or on a standalone switch to
configure a VLAN as a Remote Switched Port Analyzer (RSPAN) VLAN. Use the no form of this
command to remove the RSPAN designation from the VLAN.
Syntax Description
This command has no arguments or keywords.
Defaults
No RSPAN VLANs are defined.
Command Modes VLAN configuration (config-VLAN)
Command History Release
12.1(11)AX
Usage Guidelines You can configure RSPAN VLANs only in config-VLAN mode (entered by using the vlan global
configuration command), not the VLAN configuration mode entered by using the vlan database
privileged EXEC command.
If VTP is enabled, the RSPAN feature is propagated by VLAN Trunking Protocol (VTP) for VLAN-IDs
that are lower than 1005. If the RSPAN VLAN ID is in the extended range, you must manually configure
intermediate switches (those in the RSPAN VLAN between the source switch and the destination
switch).
Before you configure the RSPAN remote-span command, use the vlan (global configuration) command
to create the VLAN.
The RSPAN VLAN has these characteristics:
•
•
•
When an existing VLAN is configured as an RSPAN VLAN, the VLAN is first deleted and then recreated
as an RSPAN VLAN. Any access ports are made inactive until the RSPAN feature is disabled.
Examples This example shows how to configure a VLAN as an RSPAN VLAN.
Switch(config)# vlan 901
Switch(config-vlan)# remote-span
78-16181-03
remote-span
no remote-span
Modification
This command was introduced.
No MAC address learning occurs on it.
RSPAN VLAN traffic flows only on trunk ports.
Spanning Tree Protocol (STP) can run in the RSPAN VLAN, but it does not run on RSPAN
destination ports.
Catalyst 3750 Switch Command Reference
remote-span
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