North American Network Operators Group
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RE: what's that smell?

  • From: Jason Lixfeld
  • Date: Tue Oct 08 14:51:21 2002 
> On Tue, 8 Oct 2002, Jason Lixfeld wrote:
> > In more cases than not, especially now adays with lots of networks
> > peering all over gods creation, RPF can have some pretty detrimental
> > effects if your routing is somewhat asymmetrical.
> 
> actually RPF is extremely effective especially where its highly 
> asymmetrical, eg at the edge. theres virtually no reason not to RPF 
> dialup/isdn/cable/dsl/etc customers for example.

Sure, but to RPF so many customer facing edge ports in comparison to the
far fewer number of egress ports makes the implementation procedure
quite extensive.  The more configuration, the more room for errors or
"oops, forgot to configure that there", not to mention change
management.