Administrator Guide

Layer 3 Routing Commands 1264
distribute-list prefix out (BGP Router
Configuration)
Use this command to configure a filter that restricts the advertisement of
routes based on destination prefix.
Syntax
distribute-list prefix list-name out [ protocol | connected | static ]
no distribute-list prefix
list-name out [ protocol | connected | static ]
• prefix list-name —A prefix list used to filter routes advertised to neighbors.
•
protocol | connected | static —(Optional) When a route source is specified,
the distribute list applies to routes redistributed from that source. Only
routes that pass the distribute list are redistributed. The
protocol value
may be either
rip or ospf .
Default Configuration
No distribute lists are defined by default.
Command Mode
BGP Router Configuration mode
User Guidelines
Only one instance of this command may be defined for each route source
(RIP, OSPF, static, connected). One instance of this command may also be
configured as a global filter for outbound prefixes.
If the command refers to a prefix list that does not exist, the command is
accepted and all routes are permitted.
When a distribute list is added, changed, or deleted for route redistribution,
BGP automatically reconsiders all best routes.
Command History
Introduced in version 6.2.0.1 firmware.
Example
console(config-router)#distribute-list prefix 255 out
2CSNXXX_SWUM204.book Page 1264 Monday, January 25, 2016 1:25 PM