Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 180
Manipulate the COMMUNITY attribute
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www.dell.com | support.dell.com Manipulate the COMMUNITY attribute In addition to permitting or denying routes based on the values of the COMMUNITY attributes, you can manipulate the COMMUNITY attribute value and send the COMMUNITY attribute with the route information. By default, FTOS does not send the COMMUNITY attribute. Use the following command in the CONFIGURATION ROUTER BGP mode to send the COMMUNITY attribute to BGP neighbors. Command Syntax neighbor {ip-address | peer-group-name} send-community Command Mode CONFIG-ROUTERBGP Purpose Enable the software to send the router's COMMUNITY attribute to the BGP neighbor or peer group specified. To view the BGP configuration, use the show config command in the CONFIGURATION ROUTER BGP mode. If you want to remove or add a specific COMMUNITY number from a BGP path, you must create a route map with one or both of the following statements in the route map. Then apply that route map to a BGP neighbor or peer group. Use these commands in the following sequence, starting in the CONFIGURATION mode: Step Command Syntax Command Mode 1 route-map map-name [permit | deny] [sequence-number] CONFIGURATION 2 set comm-list CONFIG-ROUTE-MAP community-list-name delete set community {community-number | local-as | no-advertise | no-export | none} CONFIG-ROUTE-MAP Purpose Enter the ROUTE-MAP mode and assign a name to a route map. Configure a set filter to delete all COMMUNITY numbers in the IP 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 and are not sent to EBGP peers. • no-advertise: routes with the COMMUNITY attribute of NO_ADVERTISE and are not advertised. • no-export: routes with the COMMUNITY attribute of NO_EXPORT. • none: remove the COMMUNITY attribute. • additive: add the communities to already existing communities. 180 | Border Gateway Protocol IPv4 (BGPv4)
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