nanog mailing list archives
Re: That pesky AS path corruption bug...
From: Vijay Gill <wrath () cs umbc edu>
Date: Tue, 23 May 2000 13:26:25 -0400 (EDT)
On Tue, 23 May 2000, Blaine Christian wrote:
After observing a recent issue regarding a router that sent corrupted AS path (all names are witheld to protect the guilty). I took a look at the path information that was being received and have a possible solution. Since the corrupted AS-path does not include the AS that the route is coming from (at least in the corruption that I saw) it seems to me that a simple solution for all is to filter on AS i.e. only allow routes that have the AS of your EBGP neighbor prepended to them. I realize this does not cover all cases of wacky AS corruption problems but it may fix some of
This is a hack. We do not need more cruft added on, rather, what we need is correct behavior. The correct behavior being - if you see a corrupt/ a malformed update from a peer, send a notify and drop the session. Seems fairly simple to me. The above suggestion of your fails in case of route servers. Insist on correct behavior, not on cruftery. /vijay
Current thread:
- That pesky AS path corruption bug... Blaine Christian (May 23)
- Re: That pesky AS path corruption bug... Peter T. Whiting (May 23)
- Re: That pesky AS path corruption bug... Jeff Haas (May 23)
- Re: That pesky AS path corruption bug... Vijay Gill (May 23)
- Re: That pesky AS path corruption bug... John Fraizer (May 23)
- Re: That pesky AS path corruption bug... Jeff Haas (May 24)
- Re: That pesky AS path corruption bug... John Fraizer (May 23)
- Re: That pesky AS path corruption bug... Peter T. Whiting (May 23)
- Message not available
- Re: That pesky AS path corruption bug... Kai Schlichting (May 23)
- Re: That pesky AS path corruption bug... Daniel Senie (May 23)
- Re: That pesky AS path corruption bug... Vijay Gill (May 23)
- Re: That pesky AS path corruption bug... Kai Schlichting (May 23)
- <Possible follow-ups>
- Re: That pesky AS path corruption bug... Vadim Antonov (May 23)
- Re: That pesky AS path corruption bug... Peter T. Whiting (May 23)
- Re: That pesky AS path corruption bug... Vijay Gill (May 23)
- Re: That pesky AS path corruption bug... Blaine Christian (May 23)