Date: Fri, 3 Jan 1997 09:00:44 -0500 From: robin@intercore.com (Robin Cutshaw) To: dg@root.com Cc: robin@intercore.com (Robin Cutshaw), hackers@freebsd.org Subject: Re: tcp problems with 2.1.6.1 Message-ID: <199701031400.JAA10647@intercore.com> In-Reply-To: <199701030305.TAA18683@root.com>; from David Greenman on Jan 2, 1997 19:05:26 -0800 References: <199701021952.OAA08144@intercore.com> <199701030305.TAA18683@root.com>
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David Greenman writes:
>
> You need to mention what type of ethernet card you're using. The bug isn't
> likely with the TCP code, but rather a device driver or hardware problem.
>
Sorry, I'm using Digital DE-500 (21140 based) cards in fast ethernet mode.
I haven't seen any errors logged on behalf of the card.
Here's some interesting output from netstat -s:
tcp:
501348 packets sent
484426 data packets (214415659 bytes)
8966 data packets (5313164 bytes) retransmitted
0 resends initiated by MTU discovery
5549 ack-only packets (5005 delayed)
9 URG only packets
54 window probe packets
2244 window update packets
100 control packets
476219 packets received
392987 acks (for 214425296 bytes)
13619 duplicate acks
0 acks for unsent data
322209 packets (36425519 bytes) received in-sequence
225 completely duplicate packets (27234 bytes)
0 old duplicate packets
138 packets with some dup. data (17388 bytes duped)
328 out-of-order packets (110372 bytes)
3 packets (0 bytes) of data after window
0 window probes
4731 window update packets
0 packets received after close
5 discarded for bad checksums
0 discarded for bad header offset fields
0 discarded because packet too short
67 connection requests
28 connection accepts
0 bad connection attempts
0 listen queue overflows
95 connections established (including accepts)
94 connections closed (including 2 drops)
58 connections updated cached RTT on close
58 connections updated cached RTT variance on close
50 connections updated cached ssthresh on close
0 embryonic connections dropped
337150 segments updated rtt (of 342025 attempts)
4199 retransmit timeouts
1 connection dropped by rexmit timeout
0 persist timeouts
0 connections dropped by persist timeout
23 keepalive timeouts
23 keepalive probes sent
0 connections dropped by keepalive
87762 correct ACK header predictions
64217 correct data packet header predictions
robin
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