disable loopback-mode vlan

disable loopback-mode [ {vlan} vlan_name | vlan vlan_list]

Description

Disallows a VLAN (Virtual LAN) to be placed in the UP state without an external active port. This allows (disallows) the VLANs routing interface to become active.

Syntax Description

vlan_name Specifies a VLAN name.
vlan_list Specifies a VLAN list of IDs.

Default

N/A.

Usage Guidelines

Use this command to specify a stable interface as a source interface for routing protocols. This decreases the possibility of route flapping, which can disrupt connectivity.

Example

The following example disallows the VLAN accounting to be placed in the UP state without an external active port:

disable loopback-mode vlan accounting

History

This command was first available in ExtremeXOS 10.1.

The vlan_list option was added in ExtremeXOS 16.1.

Platform Availability

This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X620, X690, X870 series switches.