nanog mailing list archives
Re: Blackhole Routes
From: "Wayne E. Bouchard" <web () typo org>
Date: Thu, 30 Sep 2004 10:08:42 -0700
On Thu, Sep 30, 2004 at 04:40:54PM +0200, Erik Haagsman wrote:
On Thu, 2004-09-30 at 15:45, Robert A. Hayden wrote:There are mechanisms to do it using eBGP and communities as well which I'm sure most on this list are more familiar with. Think of blackholing as a way to surgically remove a specific IP from your network, without having to deal with pushing ACLs into multiple entry points. At least that's what it accomplishes for us.And perhaps more importantly, when using eBGP blackholing communities, without DDoS traffic hitting your ingress bandwidth from your upstreams. ACL's can only filter traffic that's already at your edge, whereas blackholing allows your upstream to filter it for you throughout his network, reducing the risk of congested links.
It goes a little further than that these days. Folks are openly allowing customers to advertize routes with something lika a 666 community which will then be blackholed within their network. So if you're a service provider with your own blackhole system, you can easily tie it into your upstream's system and dump the traffic many hops away from you meaning that the traffic is getting dumped closer to the source than the destination in a fair number of cases. --- Wayne Bouchard web () typo org Network Dude http://www.typo.org/~web/
Current thread:
- Blackhole Routes Abhishek Verma (Sep 29)
- Re: Blackhole Routes Suresh Ramasubramanian (Sep 30)
- Re: Blackhole Routes Stephen J. Wilcox (Sep 30)
- Re: Blackhole Routes Michael . Dillon (Sep 30)
- Re: Blackhole Routes Robert A. Hayden (Sep 30)
- Re: Blackhole Routes Erik Haagsman (Sep 30)
- Re: Blackhole Routes Wayne E. Bouchard (Sep 30)
- Re: Blackhole Routes Deepak Jain (Sep 30)
- Re: Blackhole Routes Wayne E. Bouchard (Sep 30)
- Re: Blackhole Routes Richard A Steenbergen (Sep 30)
- Re: Blackhole Routes Mark Kasten (Sep 30)
- Re: Blackhole Routes Richard A Steenbergen (Sep 30)
- Re: Blackhole Routes Erik Haagsman (Sep 30)
- Re: Blackhole Routes Jeff Aitken (Sep 30)
- Re: Blackhole Routes Christopher L. Morrow (Sep 30)
- Re: Blackhole Routes Randy Bush (Sep 30)
- Re: Blackhole Routes Christopher L. Morrow (Sep 30)
- Re: Blackhole Routes Will Yardley (Sep 30)