configure vlan router-discovery link-mtu

configure vlan vlan_name router-discovery {ipv6} link-mtu linkmtu


Configures the link MTU value sent in router discovery advertisements on the This command is available on the ExtremeSwitching X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, 5520 series switches..

Syntax Description

vlan_name Specifies an IPv6 configured VLAN.
linkmtu Specifies the link MTU. Range is 0 to 9216.


0, meaning that no link MTU information is sent.

Usage Guidelines

This command configures the link MTU placed into the router advertisement messages. Advertisement of the MTU helps ensure use of a consistent MTU by hosts on the VLAN.

The minimum value is 0, and the maximum value is 9216. The default value is 0, which means that no link MTU information is included in the router discovery messages.


The following example configures the link MTU to be 5126 for the VLAN "top_floor":

configure vlan top_floor router-discovery link-mtu 5126


This command was first available in ExtremeXOS 11.2.

Platform Availability

This command is available on the platforms listed for the IPv6 unicast routing feature in the ExtremeXOS and Switch Engine 31.7 Feature License Requirements document.