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Date:      Mon, 9 Apr 2001 16:17:46 -0700
From:      Erick Mechler <emechler@techometer.net>
To:        stable@freebsd.org
Subject:   Runt packets
Message-ID:  <20010409161746.B33217@techometer.net>

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I have a dual-homed machine doing routing and firewalling on which hundreds
of the following messages appear in my logs every 10 minutes or so:

  /kernel: icmp-response bandwidth limit 44069/200 pps
  /kernel: arp: runt packet
  last message repeated 14691 times

At the same time these messages are occurring, I find the following while
doing a tcpdump on the internal interface (it doesn't happen on the
external interface at all):

  19:05:34.247543 arp-#12469 for proto #208 (166) hardware #1 (183)
  19:05:34.247588 arp-#12469 for proto #208 (166) hardware #1 (183)
  19:05:34.247630 arp-#12469 for proto #208 (166) hardware #1 (183)
  19:05:34.247674 arp-#12469 for proto #208 (166) hardware #1 (183)
  19:05:34.247718 arp-#12469 for proto #208 (166) hardware #1 (183)
  19:05:34.247762 arp-#12469 for proto #208 (166) hardware #1 (183)
  19:05:34.247805 arp-#12469 for proto #208 (166) hardware #1 (183)

...except there are thousands of these.  Has anybody seen this before?  
I'm running a slightly old version of 4.2 (Thu Dec 14 15:28:03 EST 2000),
but I didn't see any relevant diffs to sys/netinet/if_ether.c which is
where the "runt packet" errors are sent to syslog.  Could this be a problem
of bad hardware on the part of one of the internal hosts?

Any and all help is much appreciated.

Thanks!
Erick

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