nanog mailing list archives
RE: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ?
From: "Ballard, Eric" <Eric.Ballard () suddenlink com>
Date: Mon, 17 Aug 2009 17:21:08 -0500
With the help from our transit providers and Cisco TAC the issues looks to be that AS9354 is sending AS0 and causing the corruption when processed in our Cisco CRS routers. AS9354 shows to be Community Network Center Inc. (CNCI) or TDNC and directly connected to KDDI AS2516. If anyone from AS9354 is on this list please contact me or stop this advertisement or someone from KDDI please assist. Thanks ERIC -----Original Message----- From: Joe Provo [mailto:nanog-post () rsuc gweep net] Sent: Monday, August 17, 2009 4:49 PM To: randal k Cc: nanog () nanog org Subject: Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? On Mon, Aug 17, 2009 at 03:37:07PM -0600, randal k wrote:
Yep, we started seeing this right around 12:20pm MST. We saw it from a customer's rapidly-flapping BGP peer. We told them to configure bgp maxas-limit, but apparently CRS1s don't have that command. Anybody have a handy route-map that will deny anything with a as-path longer than say 15-20? ;-)
Been a while since I had to throw this on cisco, but I since it lacks sane repeat constraint, you have to either choose to iterate over your acceptable space or deny on the longer-than-acceptable. For the latter, ^[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_[0-9]+_([0-9]+_)+ clobbers 15 ASNs and longer. -- RSUC / GweepNet / Spunk / FnB / Usenix / SAGE
Current thread:
- Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Adam Hebert (Aug 17)
- RE: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Ballard, Eric (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? James Bensley (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? randal k (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Joe Provo (Aug 17)
- RE: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Ballard, Eric (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Jared Mauch (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Ricky Beam (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Paul Ferguson (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Marko Milivojevic (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Brett Watson (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Kevin Oberman (Aug 17)
- Re: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Joe Provo (Aug 17)
- RE: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Ballard, Eric (Aug 17)
- RE: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Dylan Ebner (Aug 18)
- RE: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Ivan Pepelnjak (Aug 18)
- RE: Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ? Dylan Ebner (Aug 18)