Re: Missing ACKs with Linux 2.2/2.4?

From: David S. Miller (davem@redhat.com)
Date: Fri Nov 10 2000 - 06:46:02 EST


   Date: Fri, 10 Nov 2000 11:49:13 +0000 (GMT)
   From: Ben Mansell <ben@zeus.com>

   (client-side tcpdump)
 ...
   11:05:32.547518 cobalt-box.echo > artemis.39061: P 1:1449(1448) ack 1602 win 31856 <nop,nop,timestamp 0 76152422> (DF)
                ^^^^^^^^^^^

   (server-side)
 ...
    11:05:32.437733 cobalt-box.echo > artemis.39061: P 1:1449(1448) ack 1602 win 31856 <nop,nop,timestamp 0 76152422> (DF)
                 ^^^^^^^^^^^

Wheee... zero timestamp from Cobalt box. Artemis (correctly) drops
this packet (due to PAWS test because a zero timestamp is "older" than
the most recent timestamp Artemis saw from cobalt-box). Upgrade it's
kernel and retest :-)

Later,
David S. Miller
davem@redhat.com
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