2011/11/29 Gert Doering <[email protected]> > Hi, > > On Tue, Nov 29, 2011 at 08:04:42AM -0500, Keegan Holley wrote: > > >> That's crap. > > > > > > In that case: "I encourage all my competitors to do so". > > > > > > What's your AS number? Shall we see what happens if I announce the /24 > > > with your name servers in it? (Except that I'm a good guy, and would > > > never do that, of course). > > > > Yea sure. I have a better test. Why don't you tell one of your upstreams > > that you want to advertise a block they've given you to another ISP for > > redundancy. Just because you accept a few routes with LOA agreements > > doesn't mean you accept any route from any as path. > > Thanks for making this very clear: it is *very* important to *not* accept > just about anything that comes along - and filtering "routes from my > network blocks" plus "routes for any exchange points I'm connected to" > is really "basic network stability 101". >
I agree with that completely. I think there were alot of misunderstandings in our discussion. > > Most ISPs these days do not seem to have customers that use BGP-based > multihoming using networks from the ISP's PA blocks - but of course, > exceptions happen (we have one customer that uses an IPv6 /48 from our > /32 due to historic reasons). > There's no real way to multi-home and not change address space other than multihoming. That's why there are so many wasted /24's and AS numbers out there. > > > What's the alternative? Yet another AS with a single /24 and 10 web > > servers living unit because their provider wouldn't multihome? > > Where exactly is the difference between "one globally visible route" and > "one globally visible route"? And what does this have anything to do > with prudent route filtering? > It's really the wasted ARIN/RIPE assignment in the IP4 exhaustion phase. You're right though what I said here wasn't 100% accurate. If you multihome ISP number 1 would have to give you a /24 or larger. > > gert > -- > USENET is *not* the non-clickable part of WWW! > // > www.muc.de/~gert/ <http://www.muc.de/%7Egert/> > Gert Doering - Munich, Germany > [email protected] > fax: +49-89-35655025 > [email protected] > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
