Quick Reference Guide

498 VLAN Commands
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ip internal-usage-vlan
The ip internal-usage-vlan Interface Configuration mode command reserves a VLAN as the
internal usage VLAN of an interface. Use the no form of this command to return to the default
configuration.
Syntax
• ip internal-usage-vlan vlan-id
• no ip internal-usage-vlan
• vlan-id — Specifies the ID of the internal usage VLAN.
Default Configuration
The software reserves an unused VLAN as the internal usage VLAN of an interface.
Command Mode
Interface Configuration (Ethernet, port-channel) mode.
User Guidelines
• An internal usage VLAN is required when an IP interface is configured on an Ethernet port or
port-channel.
• This command enables the user to configure the internal usage VLAN of a port. If an internal
usage VLAN is not configured and the user configures an IP interface, an unused VLAN is
selected by the software.
• If the software selected a VLAN for internal use and the user uses that VLAN as a static or
dynamic VLAN, the user should do one of the following:
– Remove the IP interface.
– Create the VLAN and recreate the IP interface.
– Use this command to explicitly configure a different VLAN as the internal usage VLAN.
• This command is not supported under the command
interface range ethernet .
Example
The following example reserves VLAN 15 as the internal usage VLAN of ethernet port 1/e8.
Console# config
Console(config)# interface ethernet 1/e8
Console(config-if)# ip internal-usage-vlan 15