Table of Contents
Advertisement
JunosE 11.3.x IP Services Configuration Guide
set community
Extended Community Lists
ip extcommunity-list
40
host1:vr1(config-router)#neighbor 192.3.4.5 send-community standard
Use the no version to specify that common attributes not be sent to a BGP neighbor.
See neighbor send-community.
Use to set the community attribute in BGP updates.
You can specify a community list number in the range 1–4294967295, or in the new
community format of AA:NN, or you can specify one of the following well-known
communities:
local-as—Prevents advertisement outside the local AS
no-advertise—Prevents advertisement to any peer
no-export—Prevents advertisement beyond the BGP confederation boundary
Alternatively, you can use the list keyword to specify the name of a community list
that you previously created with the ip community-list command.
You can use this command with inbound, outbound, and redistribution route maps.
Use the none keyword to remove the community attribute from a route.
Example
host1(config)#route-map 1
host1(config-route-map)#set community no-advertise
Use the no version to remove the set clause from a route map.
See set community.
The router supports the BGP extended community attribute defined in Internet draft BGP
Extended Communities Attribute— draft-ietf-idr-bgp-ext-communities-07.txt (February
2004 expiration). This attribute enables the definition of a type of IP extended community
and extended community list unrelated to the community list that uses regular
expressions.
NOTE: IETF drafts are valid for only six months from the date of issuance.
They must be considered as works in progress. For the latest drafts, please
see the IETF Web site at http://www.ietf.org.
BGP devices can use the extended community attribute to control routes much like they
use the community attribute to determine routes that they accept, reject, or redistribute.
A BGP device can append the extended community attribute to a route that does not
have the attribute before it advertises the route. For routes that do have the attribute,
BGP can modify the attribute.
Copyright © 2010, Juniper Networks, Inc.
Advertisement
Table of Contents
