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...