nanog mailing list archives
Re: Did your BGP crash today?
From: Thomas Mangin <thomas.mangin () exa-networks co uk>
Date: Sat, 28 Aug 2010 14:51:17 +0200
We had ASN4, AS-PATH and this one. More or less we hit this session reset problem once a year but nothing was done yet to change the RFC. So I am to blame as much as every network engineer to not have pushed for a change or at least a comprehensive explanation on the session teardown behaviour is like it is and should not be changed. It is only our fault for not having dealt with the problem the first time correctly, and will be next time if nothing is changed once more. I agree correctly framed invalid packet should be discarded without tearing the session down. --- from my iPhone On 28 Aug 2010, at 14:27, Florian Weimer <fw () deneb enyo de> wrote:
* Raymond Dijkxhoorn:Not sure if the link was posted allready ... http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4411f.shtmlCisco posts their advisories to the NANOG list.'The vulnerability manifests itself when a BGP peer announces a prefix with a specific, valid but unrecognized transitive attribute. On receipt of this prefix, the Cisco IOS XR device will corrupt the attribute before sending it to the neighboring devices. Neighboring devices that receive this corrupted update may reset the BGP peering session.'I'm not sure what you intend to say by quoting this part of the advisory. If you think that it's an IOS XR bug which only needs fixing in IOS XR, you're showing the very attitude which has stopped us from making the network more resilient to these types of events.
Current thread:
- Re: Did your BGP crash today?, (continued)
- Re: Did your BGP crash today? Florian Weimer (Aug 28)
- Re: Did your BGP crash today? Christian Martin (Aug 28)
- Re: Did your BGP crash today? Randy Bush (Aug 28)
- Re: Did your BGP crash today? lorddoskias (Aug 28)
- Re: Did your BGP crash today? Florian Weimer (Aug 28)
- Re: Did your BGP crash today? Claudio Jeker (Aug 28)
- Re: Did your BGP crash today? Florian Weimer (Aug 28)
- Re: Did your BGP crash today? Raymond Dijkxhoorn (Aug 28)
- Re: Did your BGP crash today? Florian Weimer (Aug 28)
- Re: Did your BGP crash today? Raymond Dijkxhoorn (Aug 28)
- Re: Did your BGP crash today? Thomas Mangin (Aug 28)
- Re: Did your BGP crash today? Thomas Mangin (Aug 28)
- Re: Did your BGP crash today? Claudio Jeker (Aug 28)
- Re: Did your BGP crash today? Brett Frankenberger (Aug 28)
- Re: Did your BGP crash today? Mikael Abrahamsson (Aug 29)
- Re: Did your BGP crash today? Randy Bush (Aug 29)
- Re: Did your BGP crash today? Paul Ferguson (Aug 29)
- Re: Did your BGP crash today? Dobbins, Roland (Aug 29)
- Re: Did your BGP crash today? Brett Frankenberger (Aug 29)
- Re: Did your BGP crash today? Thomas Mangin (Aug 29)
- Re: Did your BGP crash today? James Hess (Aug 29)