From owner-freebsd-hackers@FreeBSD.ORG  Mon Mar 27 16:18:53 2006
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From: Borja Marcos <BORJAMAR@SARENET.ES>
Date: Mon, 27 Mar 2006 18:18:50 +0200
To: "Michael W. Lucas" <mwlucas@blackhelicopters.org>
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Cc: hackers@freebsd.org
Subject: Re: syslogd not draining
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> I've got a machine running syslogd, DNS, DHCP, flow-capture, and other
> assorted UDP-loving programs.  Occasionally, they all stop working.
> The machine has been up for a couple of hours now, and I see:
>
> ns1/etc;netstat -s | grep full
> Warning: sysctl(net.inet6.ip6.rip6stats): No such file or directory
>         122066 dropped due to full socket buffers
> ns1/etc;
>
> I've doubled kern.ipc.maxsockbuf a couple of times now, and yet it
> still happens.
>
> After some help from questions@, I'm pretty sure that the culprit is
> syslogd.
>
> udp4       0      0  *.67                   *.*
> udp4   43414      0  *.514                  *.*
> udp4       0      0  *.49661                *.*

Are you using a serial console? I had similar problems in the past  
due to the serial port flow control.






Borja.