Filtering Routes With Community Lists - Dell S3048-ON Configuration Manual

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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
match {community community-list-name [exact] | extcommunity extcommunity-list-name [exact]}
3 Return to CONFIGURATION mode.
CONFIG-ROUTE-MAP mode
exit
4 Enter ROUTER BGP mode.
CONFIGURATION mode
router bgp as-number
AS-number: 0 to 65535 (2-Byte) or 1 to 4294967295 (4-Byte) or 0.1 to 65535.65535 (Dotted format)
5 Apply the route map to the neighbor or peer group's incoming or outgoing routes.
CONFIG-ROUTER-BGP mode
neighbor {ip-address | peer-group-name} route-map map-name {in | out}
To view the BGP configuration, use the show config command in CONFIGURATION ROUTER BGP mode. To view a route map
configuration, use the show route-map command in EXEC Privilege mode.
To view which BGP routes meet an IP community or IP extended community list's criteria, use the show ip bgp {community-list
| extcommunity-list} command in EXEC Privilege mode.
Border Gateway Protocol IPv4 (BGPv4) 201