From: Andy Cole (Andy.Cole@foremostfarms.com)
Date: Wed Dec 26 2007 - 16:03:55 ART
1: IF an Aggregate Address exists (exist-map) THEN inject the more
precise route (inject-map)
We have an Aggregate configured downstream 192.168.0.0/16 but we
want to advertise 192.168.20.0/24. We could to this to have the
upstream router prefer our exit point over another.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hi
rp_r/rte_bgh1.htm#wp1071929
2:If you want to prefer one link over another,
R3 is connected to R1 and R2. R1 and R2 are also connected to each
other. You must prefer R1 over R2, to reach R3's loopback 150.3.3.3
can't use Weight, AS Prepend, Med, Local Preference. For example: All 3
routers are in different AS's R1-AS100 R2-AS200 and R3-AS300
If the link on R1 does NOT exist advertise 150.3.3.3 to R2.
So R2 will route to R1 THEN to R3 even though R1 has a direct connection
to R3. UNLESS R1 to R3 goes down.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hi
rp_r/rte_bgh2.htm#wp1071377
Andy
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
abdul muhammed
Sent: Wednesday, December 26, 2007 12:09 PM
To: Cisco certification
Subject: need Help on Conditional Route-advertisement
Hi,
Please can somebody throw more light on the following and their
differences:
1. BGP inject-map exist-map command.
2. neighbor x.x.x.x advertise-map exist-map/non-exist-map command in
conditional route advertisement
what kind of scenario will require 1 or 2 above
Thanks
This archive was generated by hypermail 2.1.4 : Tue Jan 01 2008 - 12:04:32 ARST