Netbrain
Home NetBrain Product One-Skill-at-a-Time Search Mark Forums Read
Go BackThe Net-BrainerOne-Skill-at-a-Time How to conditionally advertise a default route to BGP neighbors?

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-16-2009, 06:38 AM
David.C David.C is offline
 
Join Date: May 2009
Posts: 118
Default How to conditionally advertise a default route to BGP neighbors?


Preview Qmap: "BGP Default-route.qmap"


According to the topology above, configure R6 to conditionally advertise a default route to BGP neighbors when it has route to 11.11.36.0/30.
Attached Files
File Type: qmap BGP Default-route.qmap (29.4 KB, 1 views)

Last edited by David.C; 11-20-2009 at 08:02 AM.
Reply With Quote
Old 07-16-2009, 06:46 AM
David.C David.C is offline
 
Join Date: May 2009
Posts: 118
Default Knowledge Points

In this case, you can conditionally advertise a default-route by using the advertise-map, exist-map, non-exist map.



neighbor 11.11.67.7 advertise-map adv_default exist-map to_R3
  • advertise-map Specifies the BGP route that will be advertised if the conditions of the exist map or non-exist map are met.
  • exist-map Specifies the conditional routes that need to be in local route table in order for BGP to advertise the routes defined in advertise-map.
  • non-exist-map Specifies the conditional routes that must not be in local route table before BGP starts to advertise routes defined in advertise-map
Verify via:

R1#show ip route bgp
11.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
B 11.11.6.0/24 [20/0] via 11.11.17.7, 00:09:30
B 11.11.7.0/24 [20/0] via 11.11.17.7, 00:09:31
B* 0.0.0.0/0 [20/0] via 11.11.17.7, 00:08:22

Last edited by David.C; 07-16-2009 at 06:49 AM.
Reply With Quote
Reply

Bookmarks

Tags
BGP, CCIE, Routing

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Forum Jump

All times are GMT -4. The time now is 03:19 PM.
Powered by vBulletin
Copyright 2000-2010 Jelsoft Enterprises Limited.
Copyright 2009 NetBrain, Inc. All rights reserved.