Dropped Packets

Simon Chang simonychang at gmail.com
Sun Feb 24 15:57:06 UTC 2008

Hardware issues come to mind.  Do you have a dmesg?


On Sun, Feb 24, 2008 at 9:27 AM, Dave Raven <dave at raven.za.net> wrote:
> Hi all,
>          I have a FreeBSD 4.11 (I know its outdated but I don't have an
>  option) box which is behaving very weirdly. After about a day and a half it
>  starts to drop packets - about 6-10% of pings at least, and tcp traffic
>  becomes unreliable etc.
>  I have swapped out the network cards, the cables etc and I don't have any
>  mbuf problems and all seems fine. For the first day the box works fine -
>  pinging, doing tcp traffic etc; and then suddenly it just stops. Rebooting
>  brings it all back to normal.
>  Any ideas what could be causing this, and how I could go about diagnosing
>  it? As far as I know there are no known bugs for this. I'm using the em
>  driver, but not with SMP. There are no errors on the interface, and the em
>  debug_info and stats sysctl's don't show any problems - there is no
>  indication on the box itself that its dropping packets..
>  My thinking is that it must be box specific as a reboot solves the problem?
>  Thanks in advance
>  Dave
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