configure isis area interlevel-filter level 2-to-1

configure isis area area_name interlevel-filter level 2-to-1 [policy | block-all | allow-all] {ipv4 | ipv6}


This command enables route leaking from level 2 to level 1 on an L1/L2 router.

Syntax Description

area_name Specifies the router process for which this configuration change applies.
policy Specifies a policy to control how L2 routes are leaked to L1.
block-all Blocks all route leaking.
allow-all Leaks all routes into level 1.
ipv4 | ipv6 Applies the interlevel filter to IPv4 or IPv6. If neither IPv4 nor IPv6 is specified, this command applies to IPv4.



Usage Guidelines

When a policy is supplied with this command, all routes are leaked unless explicitly denied in the policy. This command has no effect on level 1-only and level 2-only routers. For policies, the nlri match attribute is supported, and the permit and deny set attributes are supported.


The following command configures areax to leak all level 2 routes to level 1 for IPv4:

configure isis area areax interlevel-filter level 2-to-1 allow-all


This command was first available in ExtremeXOS 12.1.

Platform Availability

This command is available on platforms with a Premier license as described in the Switch Engine 32.2 Feature License Requirements document.