[OpenAFS] Re: client hangs with 1.2.13 redhat 9 servers

Joe Buehler jbuehler@spirentcom.com
Wed, 23 Feb 2005 07:39:28 -0500


Mike Fedyk wrote:

>> I've noticed that too in some cases, and not just with AFS.
>> It seems that in at least some situations, tcpdump does not get to see 
>> the real UDP checksum that will appear on the wire for outgoing 
>> traffic.  This is entirely dependent on how the operating system 
>> implements its packet tracing facility.
> 
> 
> Does your ethernet card have hardware checksumming?  Maybe tcpdump is 
> getting the packets before the hardware has put in the checksums...

I don't know -- it seems a bit odd that most packets would
have the correct checksum, but a few would not.
-- 
Joe Buehler