dhclient wedged

[Brooks Davis]

On Mon, Jan 23, 2006 at 10:06:56AM +0100, Krzysztof Kowalik wrote:
> Brooks Davis <brooks at one-eyed-alien.net> wrote:
> > This definitly sounds like something particular to your dhcp servers.
> > It would be nice if we could fix it, but without some debugging help
> > that's going to be pretty much impossible.  [...]
> 
> It happens to me quite often, too. The only thing related in the
> non-debug messages is:
> 
> Jan  8 12:02:19 moneypenny dhclient[68091]: 5 bad IP checksums seen in 5 packets
> Jan  8 12:02:49 moneypenny last message repeated 743054 times
> Jan  8 12:04:50 moneypenny last message repeated 2951866 times
> Jan  8 12:14:51 moneypenny last message repeated 14457921 times
> Jan  8 12:24:52 moneypenny last message repeated 14812032 times
> Jan  8 12:34:53 moneypenny last message repeated 14770327 times
> Jan  8 12:44:55 moneypenny last message repeated 14748300 times
> Jan  8 12:51:44 moneypenny last message repeated 10037074 times
> 
> ... which accounts for the CPU usage, I guess. I killed the "bad IP
> checksums" messages, so it doesn't annoy my syslog anymore, but it of
> course didn't fix the underlaying issue. 
> 
> I was looking at those packets with tcpdump once and didn't see anything
> obvious/bad there.
> 
> And yes, I didn't have this problem with ISC client. And I surely use
> different cable provider, than the original poster ;)

What NIC are you using?  This particular issue sounds like a NIC
returning corrupt packets for some reason.  Alternatively, the sending
server could be producing corrupt packets.  Some tcpdump traces
(preferably raw dumps) could be useful.

-- Brooks

-- 
Any statement of the form "X is the one, true Y" is FALSE.
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