nanog mailing list archives
Re: AS0 in AS path
From: Mikhail Strizhov <strizhov () cs colostate edu>
Date: Fri, 06 Aug 2010 16:10:36 -0600
Thanks everyone. Answer is simple - 4byte ASN's.I was parsing Route Views RIB-IN tables, and found that, by default, Quagga is using 4byte AS length field to store 2-byte and 4-byte AS Numbers. So, using 2 bytes length in parser, I had wierd output like "0 3549 0 1239" and so on.
-- Sincerely, Mikhail Strizhov Email: strizhov () cs colostate edu <mailto:strizhov () cs colostate edu> On 08/06/2010 03:47 PM, Kameron Gasso wrote:
On 08/06/2010 02:15 PM, Mikhail Strizhov wrote:Does anybody have\had experience with BGP announces containing AS 0 in AS path? I know that AS 0 is reserved by IANA, but still, is it possible to receive such announce messages?eBGP or iBGP? What type of device and/or software are you using to speak BGP? As far as I know, most devices should NOT let you set your ASN to 0 or let you add it to the AS path. My guess is it's probably going to be filtered by the BGP scanner, but I don't have any gear laying around that I can play with at the moment to confirm. :)
Current thread:
- AS0 in AS path Mikhail Strizhov (Aug 06)
- Re: AS0 in AS path Kameron Gasso (Aug 06)
- Re: AS0 in AS path Mikhail Strizhov (Aug 06)
- Re: AS0 in AS path Valdis . Kletnieks (Aug 06)
- Re: AS0 in AS path David Conrad (Aug 06)
- Re: AS0 in AS path Kameron Gasso (Aug 06)