Filtering Routes With Community Lists - Dell S4048T Configuration Manual

CONFIG-COMMUNITY-LIST mode
{permit | deny} {{rt | soo} {ASN:NN | IPADDR:N} | regex REGEX-LINE}
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.
Example of the show ip extcommunity-lists Command
To 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 or
CONFIGURATION EXTCOMMUNITY LIST mode or the show ip {community-lists | extcommunity-
list} command in EXEC Privilege mode.
Dell#show ip community-lists
ip community-list standard 1
deny 701:20
deny 702:20
deny 703:20
deny 704:20
deny 705:20
deny 14551:20
deny 701:112
deny 702:112
deny 703:112
deny 704:112
deny 705:112
deny 14551:112
deny 701:667
deny 702:667
deny 703:667
deny 704:666
deny 705:666
deny 14551:666
Dell#

Filtering Routes with Community Lists

To use an IP community list or IP extended community list to filter routes, you must apply a match
community 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 mode
route-map map-name [permit | deny] [sequence-number]
2 Configure a match filter for all routes meeting the criteria in the IP community or IP extended
community list.
CONFIG-ROUTE-MAP mode
Border Gateway Protocol IPv4 (BGPv4) 247