> I would think Strict RPF doesn't work well in multihomed scenarios
> where traffic flows asymmetric since most likely you will be receiving
> traffic not on the interface used for getting to the network the
> traffic is coming from.
Quite right. If you are multihomed and you use strict uRPF, you will
probably be blackholing certain amount of traffic and this is not
something you want.
The idea of loose uRPF is just to ensure that there is "a valid route"
in the RIB - no matter where. The important thing is that null routes
(pointing to Null0) are *not* considered valid. With this, things like
source-based remote triggered blackholing becomes possible.
-- Marko Milivojevic - CCIE #18427 Senior Technical Instructor - IPexpert YES! We include 400 hours of REAL rack time with our Blended Learning Solution! Mailto: markom_at_ipexpert.com Telephone: +1.810.326.1444 Fax: +1.810.454.0130 Web: http://www.ipexpert.com/ Blogs and organic groups at http://www.ccie.netReceived on Tue May 11 2010 - 03:56:31 ART
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