Filtering Routes With Community Lists; Manipulating The Community Attribute - Dell Force10 Z9000 Configuration Manual

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
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.

Manipulating 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, Dell Networking OS does not send the COMMUNITY attribute.
Border Gateway Protocol IPv4 (BGPv4)
181