From owner-freebsd-hackers Fri Jan 3 06:08:52 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id GAA22804 for hackers-outgoing; Fri, 3 Jan 1997 06:08:52 -0800 (PST) Received: from intercore.com ([199.181.243.1]) by freefall.freebsd.org (8.8.4/8.8.4) with ESMTP id GAA22799 for ; Fri, 3 Jan 1997 06:08:48 -0800 (PST) Received: (robin@localhost) by intercore.com (8.7.1/8.6.4) id JAA10647; Fri, 3 Jan 1997 09:00:44 -0500 (EST) Message-Id: <199701031400.JAA10647@intercore.com> 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 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> X-Mailer: Mutt 0.47 Mime-Version: 1.0 Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk 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