Reference Guide

Border Gateway Protocol | 201
• All routes with the NO_EXPORT_SUBCONFED (0xFFFFFF03) community attribute are not sent to
CONFED-EBGP or EBGP peers, but are sent to IBGP peers within CONFED-SUB-AS.
• All routes with the NO_ADVERTISE (0xFFFFFF02) community attribute must not be advertised.
• All routes with the NO_EXPORT (0xFFFFFF01) community attribute must not be advertised outside a
BGP confederation boundary, but are sent to CONFED-EBGP and IBGP peers.
FTOS also supports BGP Extended Communities as described in RFC 4360—BGP Extended
Communities Attribute.
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.
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.