Reference Guide

Border Gateway Protocol IPv4 (BGPv4) | 205
Use these commands in the following sequence, starting in the CONFIGURATION mode to configure an
IP community list.
Use these commands in the following sequence, starting in the CONFIGURATION mode to configure an
IP extended community list.
To set or modify an extended community attribute, use the
set extcommunity {rt | soo} {ASN:NN |
IPADDR:NN} command.
Step Command Syntax Command Mode Purpose
1
ip community-list
community-list-name
CONFIGURATION Create a Community list and enter the
COMMUNITY-LIST mode.
2
{deny | permit}
{community-number | local-AS
| no-advertise | no-export |
quote-regexp
regular-expression-list | regexp
regular-expression}
CONFIG-COMMUNITY-
LIST
Configure a Community list by denying or
permitting specific community numbers or types
of community
•
community-number: use AA:NN format
where AA is the AS number (2 or 4 Bytes)
and NN is a value specific to that autonomous
system.
• local-AS: routes with the COMMUNITY
attribute of NO_EXPORT_SUBCONFED.
•
no-advertise: routes with the
COMMUNITY attribute of
NO_ADVERTISE.
• no-export: routes with the COMMUNITY
attribute of NO_EXPORT.
• quote-regexp: followed by any number of
regular expressions. The software applies all
regular expressions in the list.
• regexp: followed by a regular expression.
Step Command Syntax Command Mode Purpose
1 ip extcommunity-list
extcommunity-list-name
CONFIGURATION Create a extended community list and enter the
EXTCOMMUNITY-LIST mode.
2
{permit | deny} {{rt | soo}
{ASN:NN | IPADDR:N} | regex
REGEX-LINE}
CONFIG-COMMUNITY-
LIST
Two types of extended communities are
supported. Filter routes based on the type of
extended communities they carry using one of
the following keywords:
• rt: Route Target
• soo: Route Origin or Site-of-Origin.
Support for matching extended communities
against regular expression is also supported.
Match against a regular expression using the
following keyword:
• regexp: regular expression