Subject: Re: bridge(4) and silent data corruption :-(
To: Michael Richardson <email@example.com>
From: Jonathan Stone <jonathan@DSG.Stanford.EDU>
Date: 04/29/2002 13:48:37
In message <200204292035.g3TKZ9c15253@marajade.sandelman.ottawa.on.ca>,
Michael Richardson writes:
> Sean> (tcpdump -w x -vvv -s 1500 -i en0 -ttt host world; tcpdump -r x
> Sean> yeah, station-a is a mac os x laptoy...).
> I can't really see anything wrong there... with -vvv it should be checking
>the TCP checksums, so they are okay.... There isn't any NAT occuring on
>"router" is there?
If you're looking for bad-cksum indications, you want the -vvv on the
pretty-printer side, not the data-collection (capture) side.
(tcpdump -w x -s 1500 -i en0 ip host "host" and ip host "world"; tcpdump -r x -vvv -ttt)
mutatis mutandis, for anything different from Sean's original.
Then again, perhaps it was just a glitch in transcription.