Dell Force10 S4820T S4820T Configuration Guide - Page 220

www.dell.com | support.dell.com • 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. 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} CONFIG-COMMUNITY- Configure a Community list by denying or {community-number | local-AS LIST permitting specific community numbers or types | no-advertise | no-export | of community quote-regexp • community-number: use AA:NN format regular-expression-list | regexp where AA is the AS number (2 or 4 Bytes) regular-expression} 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. Use these commands in the following sequence, starting in the CONFIGURATION mode to configure an IP extended community list. Step Command Syntax 1 ip extcommunity-list extcommunity-list-name Command Mode CONFIGURATION Purpose Create a extended community list and enter the EXTCOMMUNITY-LIST mode. 220 | Border Gateway Protocol IPv4 (BGPv4)