North American Network Operators Group|
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Re: Best way to deal with bad advertisements?
> > In this case, the very first thing you should probably do is to > > start announcing the more specific /24s to match their advertisements! > > Depending on AS-PATH length (how various nets hear your announcements > > vs. theirs) this may solve the immediate problem, allowing you to hunt > > them down and kill them at your leisure. > > The downside to this is that we go from advertising /16's > out, to advertising a fleet of /24's out, most of which > would be filtered by Sprint's ever-lovin' CIDR-forcing > wall. I agree with Sprint, and Sean, but in this case > it pretty much makes it hard for us to force the issue > by dropping to the same or smaller sized announcement. > > Good thought, though! Even if it does result in going > from 2 /16 announcements to 512 /24 announcements in > the process, growing the routing tables, and generally > making everyone else unhappy as well. Only advertise the /24s that they're announcing of yours. And if you need to get them into Sprint, see if a multi- homed Sprint customer will temporarily shove them into Sprint and static them back to you via another provider/connection. > *sigh* There really MUST be some nice way of handling > lame ISP's like this. > > > 1) Announce *your own* routes more specifically. > > This may lose you ANS connectivity, though. I meant ANS connectivity because of RADB issues, but yes, anyone who filters small announcements in your space won't see you. > I took that step last night, and was advised to remove it by > those more in tune with legal issues. I guess it's not > considered "nice" to sink to the same level as your > attacker, and play dirty. :-} No, but if it went on for 12 hours, I very well might do so. > > Avi > > Again, my thanks for you feedback and support! > > Matt Petach Sure, good luck. And if you're going for the shunning effect, tell us all who it is that you're having trouble with. Avi - - - - - - - - - - - - - - - - -