• soo: route origin or site-of-origin. Support for matching extended communities against regularexpression is also supported. Match against a regular expression using the following keyword.• regexp: regular expression.Example of the show ip extcommunity-lists CommandTo set or modify an extended community attribute, use the set extcommunity {rt | soo} {ASN:NN |IPADDR:NN} command.To view the configuration, use the show config command in CONFIGURATION COMMUNITY-LIST orCONFIGURATION EXTCOMMUNITY LIST mode or the show ip {community-lists | extcommunity-list} command in EXEC Privilege mode.Dell#show ip community-listsip community-list standard 1deny 701:20deny 702:20deny 703:20deny 704:20deny 705:20deny 14551:20deny 701:112deny 702:112deny 703:112deny 704:112deny 705:112deny 14551:112deny 701:667deny 702:667deny 703:667deny 704:666deny 705:666deny 14551:666Dell#Filtering Routes with Community ListsTo use an IP community list or IP extended community list to filter routes, you must apply a matchcommunity filter to a route map and then apply that route map to a BGP neighbor or peer group.1 Enter the ROUTE-MAP mode and assign a name to a route map.CONFIGURATION moderoute-map map-name [permit | deny] [sequence-number]2 Configure a match filter for all routes meeting the criteria in the IP community or IP extendedcommunity list.CONFIG-ROUTE-MAP modematch {community community-list-name [exact] | extcommunity extcommunity-list-name [exact]}3 Return to CONFIGURATION mode.CONFIG-ROUTE-MAP modeexitBorder Gateway Protocol IPv4 (BGPv4) 230
