FTOS Configuration Guide for the C-Series - Force10 Networks

Use these commands in the following sequence, starting in the CONFIGURATION mode to configure an
IP community list.
Step Command Syntax Command Mode Purpose
1 ip community-list
community-list-name
2
{deny | permit}
{community-number |
local-AS | no-advertise |
no-export | quote-regexp
regular-expression-list |
regexp regular-expression}
CONFIGURATION Create a Community list and enter the
COMMUNITY-LIST mode.
CONFIG-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 extcommunity-list
extcommunity-list-name
2
{permit | deny} {{rt | soo}
{ASN:NN | IPADDR:N} | regex
REGEX-LINE}
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.
CONFIGURATION Create a extended community list and enter the
EXTCOMMUNITY-LIST mode.
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
To set or modify an extended community attribute, use the set extcommunity {rt | soo} {ASN:NN |
IPADDR:NN} command.
496 Border Gateway Protocol (BGP)