Date: Tue, 24 Mar 1998 16:07:33 +0000 From: Arman Hazairin <arman@ai3.net> To: freebsd-hackers@FreeBSD.ORG Subject: TCP connection hang Message-ID: <3517DA45.B2155DF7@ai3.net>
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Dear All, When I do transferring file between 2 unix box, I have following tcpdump output: --- start of dump --- 15:27:41.311138 68.10.3.1.1292 > 20.12.39.21.5577: S 2596672001:2596672001(0) win 4096 15:27:41.311309 20.12.39.21.5577 > 68.10.3.1.1292: S 2957115446:2957115446(0) ack 2596672002 win 16384 <mss 1460> (DF) 15:27:41.332507 68.10.3.1.1292 > 20.12.39.21.5577: . ack 1 win 4096 15:27:41.350373 68.10.3.1.1292 > 20.12.39.21.5577: P 1:129(128) ack 1 win 4096 15:27:41.440059 20.12.39.21.5577 > 68.10.3.1.1292: . ack 129 win 16384 (DF) 15:27:41.525956 68.10.3.1.1292 > 20.12.39.21.5577: . 129:641(512) ack 1 win 4096 15:27:41.591975 68.10.3.1.1292 > 20.12.39.21.5577: . 641:1153(512) ack 1 win 4096 15:27:41.592106 20.12.39.21.5577 > 68.10.3.1.1292: . ack 1153 win 16384 (DF) 15:27:41.672896 68.10.3.1.1292 > 20.12.39.21.5577: . 1153:1665(512) ack 1 win 4096 15:27:41.740248 68.10.3.1.1292 > 20.12.39.21.5577: . 1665:2177(512) ack 1 win 4096 15:27:41.740389 20.12.39.21.5577 > 68.10.3.1.1292: . ack 2177 win 16384 (DF) 15:27:41.810799 68.10.3.1.1292 > 20.12.39.21.5577: . 2177:2689(512) ack 1 win 4096 15:27:41.840117 20.12.39.21.5577 > 68.10.3.1.1292: . ack 2689 win 16384 (DF) 15:27:41.876887 68.10.3.1.1292 > 20.12.39.21.5577: . 2689:3201(512) ack 1 win 4096 15:27:41.943775 68.10.3.1.1292 > 20.12.39.21.5577: . 3201:3713(512) ack 1 win 4096 15:27:41.943906 20.12.39.21.5577 > 68.10.3.1.1292: . ack 3713 win 16384 (DF) 15:27:42.009857 68.10.3.1.1292 > 20.12.39.21.5577: . 3713:4225(512) ack 1 win 4096 15:27:42.040119 20.12.39.21.5577 > 68.10.3.1.1292: . ack 4225 win 16384 (DF) 15:27:42.207945 68.10.3.1.1292 > 20.12.39.21.5577: . 4225:4737(512) ack 1 win 4096 15:27:42.274151 68.10.3.1.1292 > 20.12.39.21.5577: . 4737:5249(512) ack 1 win 4096 15:27:42.341464 68.10.3.1.1292 > 20.12.39.21.5577: . 5249:5761(512) ack 1 win 4096 15:27:42.408820 68.10.3.1.1292 > 20.12.39.21.5577: . 5761:6273(512) ack 1 win 4096 15:27:42.475081 68.10.3.1.1292 > 20.12.39.21.5577: . 6273:6785(512) ack 1 win 4096 --- end of dump --- after the last line, the connection just hang, waiting for io timeout, the transfer itself never finish. I have the same problem also with ftp service between the two machine. Info: 68.10.3.1 is a SCO box (SYS SYS 3.2 2 i386) 20.12.39.21 is a FreeBSD 2.2.2-RELEASE box. is the problem in FreeBSD TCP/IP stack ? regards, -arman- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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