Dell Force10 Z9000 Configuration Manual page 208

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
route-map map-name
1
[ permit | deny ]
[sequence-number]
2 set comm-list
community-list-name
delete
set community
{community-number |
local-as | no-advertise |
no-export | none }
exit
3
4 router bgp as-number
5 neighbor {ip-address |
peer-group-name}
route-map map-name { in
| out }
To view the BGP configuration, use the
mode. To view a route map configuration, use the
Use the
show ip bgp community
matching a certain community number or pre-defined BGP community.
| Border Gateway Protocol
208
Command Mode
CONFIGURATION
CONFIG-ROUTE-MAP
CONFIG-ROUTE-MAP
CONFIG-ROUTE-MAP
CONFIGURATION
CONFIG-ROUTER-BGP
command in CONFIGURATION ROUTER BGP
show config
show route-map
command in EXEC Privilege mode
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.
Return to the CONFIGURATION mode.
Enter the ROUTER BGP mode.
Apply the route map to the neighbor or peer
group's incoming or outgoing routes.
command in EXEC Privilege mode.
(Figure 8-29) to view BGP routes