Other than AS-prepending?

From: Hotmail (hussamkibbi@hotmail.com)
Date: Tue Mar 03 2009 - 14:12:07 ARST

Hi Experts,
 
Is there a way to prefer incoming traffic other than as-prepening(or any
other attribute like MED), by using conditional advertisment or some other
features?
 
The thing is that As-Prepending not always work for all routes, there is
still some routes won't be prefered for any reason.
 
So is there a way like to assume this BGP session (backup one(r2) ) to ISP2
is down until the primary one(r1) to ther ISP1 really get down ?
 
r1(Active)--EBGP-->ISP1 r1--ibgp---r2
r2 (Standby)--EBGP-->ISP2
 
 
Cheers,
Hussam

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