From: Lars Christensen (perseusdk@gmail.com)
Date: Tue Mar 03 2009 - 14:41:25 ARST
Hi Hussam,
You can never fully control flow of routes in BGP, since you, your peers,
the end AS and the intermediate AS'es might not agree upon your policy.
Therefore, inbound traffic is not really controllable, but outbound traffic
you can control more precise.
Regards,
Lars Christensen
CCIE #20292
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Hotmail
Sent: 3. marts 2009 17:12
To: ccielab@groupstudy.com
Subject: Other than AS-prepending?
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
Blogs and organic groups at http://www.ccie.net
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