nanog mailing list archives
Re: UUNET issues?
From: Donald Stahl <don () calis blacksun org>
Date: Sun, 5 Nov 2006 21:17:52 -0500 (EST)
I actually asked Stephen if he was referring to the LSA corruption problem and he said he was referring to an earlier issue (circa 1972).Anyway, I don't think that would have helped if you're talking about the same incident I'm thinking of. There were application-level retransmissions of (corrupted) packets, complete with building new bad packets from bad data structures, all over the net The problem is documented in RFC 789 It and "The Bug Heard 'Round the World" are two of my favorite "how complex systems fail" papers; all system designers should read, memorize, and undertand both.
As for the LSA issue- rebooting would have fixed the problem, assuming it was done by all nodes at the same time. All of the Link State tables would have been rebuilt from scratch by the IMPs and the corrupt announcements would have been gone.
As I recall the IMP software was actually patched to ignore the problematic announcements from IMP 51.
-Don
Current thread:
- Re: UUNET issues?, (continued)
- Re: UUNET issues? Matthew Petach (Nov 04)
- Re: UUNET issues? Mark Smith (Nov 04)
- Re: UUNET issues? Michael Smith (Nov 04)
- Re: UUNET issues? Randy Bush (Nov 04)
- Re: UUNET issues? Michael Smith (Nov 04)
- Re: UUNET issues? Mark Smith (Nov 04)
- Re: UUNET issues? Marshall Eubanks (Nov 05)
- Re: UUNET issues? David Lesher (Nov 05)
- Re: UUNET issues? Stephen Satchell (Nov 05)
- Re: UUNET issues? Steven M. Bellovin (Nov 05)
- Re: UUNET issues? Donald Stahl (Nov 05)
- Re: UUNET issues? Donald Stahl (Nov 05)
- Router Options & Support Experiences Donald Stahl (Nov 08)
- Re: UUNET issues? nealr (Nov 04)
- Re: UUNET issues? bmanning (Nov 05)
- RE: UUNET issues? Ed Ray (Nov 05)