On Thu, 30 Sep 2004, Jeff Aitken wrote: > > On Thu, Sep 30, 2004 at 02:15:49PM -0400, Deepak Jain wrote: > > provider mistakenly advertises more routes than he should [lets say > > specifics in case #1] you can flood your upstreams' routers with > > specifics and potentially cause flapping or memory overflows... > > > > In case #2, presumably the blackhole community takes precedence, so if a > > customer is mistakenly readvertising their multihome provider's table > > with a 666 tag, all of the upstream providers might be blackholing the > > majority of their non-customer routes. > > If a customer has a prefix filter, he cannot announce bogus routes. >
true, but not universal, sadly. > If every BGP session in your network is protected by a max-prefix > limit, no matter who leaks, the damage will be limited and contained. > true, also not univeral, sadly. Many networks out there do NOT use any of these protections...
