nanog mailing list archives
Re: anyone else seeing very long AS paths?
From: Jack Bates <jbates () brightok net>
Date: Tue, 17 Feb 2009 13:19:00 -0600
German Martinez wrote:
On Tue Feb 17, 2009, Mike Lewinski wrote:bgp max-as will NOT protect you from this exploit (but if you are not vulnerable it should prevent you from propogating it).Are you trying to say that the receiving bgp speaker will drop the session no matter what but it won't forward the update?
There are reports that some versions of IOS will drop a peer upon receiving the long AS, even with a bgp max-as command. I can only presume that there are some IOS versions that determine the update is invalid prior to the max-as command determining we are not keeping the route. The whole "is the update valid?" vs "do I want this in my routing table?"
Jack
Current thread:
- Re: anyone else seeing very long AS paths?, (continued)
- Re: anyone else seeing very long AS paths? Jens Ott - PlusServer AG (Feb 17)
- RE: anyone else seeing very long AS paths? Hank Nussbacher (Feb 16)
- Re: anyone else seeing very long AS paths? Florian Weimer (Feb 17)
- Re: anyone else seeing very long AS paths? Jared Mauch (Feb 17)
- Re: anyone else seeing very long AS paths? Etaoin Shrdlu (Feb 17)
- Re: anyone else seeing very long AS paths? Adrian Chadd (Feb 17)
- Re: anyone else seeing very long AS paths? Michael Ulitskiy (Feb 17)
- Re: anyone else seeing very long AS paths? German Martinez (Feb 17)
- Re: anyone else seeing very long AS paths? Mike Lewinski (Feb 17)
- Re: anyone else seeing very long AS paths? German Martinez (Feb 17)
- Re: anyone else seeing very long AS paths? Jack Bates (Feb 17)
- Re: anyone else seeing very long AS paths? Leland E. Vandervort (Feb 17)
- RE: anyone else seeing very long AS paths? Ivan Pepelnjak (Feb 17)
- Re: anyone else seeing very long AS paths? Jack Bates (Feb 17)
- Re: anyone else seeing very long AS paths? Mike Lewinski (Feb 17)
- RE: anyone else seeing very long AS paths? Ivan Pepelnjak (Feb 17)
- Re: anyone else seeing very long AS paths? Rodney Dunn (Feb 17)
- Re: anyone else seeing very long AS paths? German Martinez (Feb 17)
- Re: anyone else seeing very long AS paths? Rodney Dunn (Feb 17)
- Re: anyone else seeing very long AS paths? Rodney Dunn (Feb 19)
- Re: anyone else seeing very long AS paths? Rodney Dunn (Feb 20)