configure bgp maximum-as-path-length

configure bgp maximum-as-path-length [max-as-path | none]


This command adds support for filtering BGP updates based on a specified maximum autonomous system path (AS-path) length. This support is on a per BGP instance basis (not per neighbor).

Syntax Description

maximum-as-path-length Specifies setting the AS path length.
max-as-path Value specifying the AS path length.

Range is 1 to 1,500.

none Specifies no maximum AS path length.



Usage Guidelines

It can be desirable to protect the router against BGP updates with excessively long AS-paths to ensure memory is not exhausted. Any BGP updates that exceed this user-defined limit are dropped. This setting does not affect existing routes.


The following example sets the AS-path to 500.

configure bgp maximum-as-path-length 500


This command was first available in ExtremeXOS 21.1.

Platform Availability

This command is available on the ExtremeSwitching X450-G2, X460-G2, X670-G2, X465, X590, X620, X690, X695, X870, 5320, 5420, 5520.