timeout value in TCP implementation

kunchanl <kunchanl@pollux.usc.edu> Sun, 20 April 2003 16:57 UTC

Date: Sun, 20 Apr 2003 09:57:00 -0700
From: kunchanl <kunchanl@pollux.usc.edu>
To: tcp-impl@lerc.nasa.gov
Subject: timeout value in TCP implementation
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Hi,

    I've observed quiet a few of connections in my tcpdump trace
has the SYN packet re-transmitted after about 3 seconds (as
the example below). I'm wondering if this 3-second is related
some particular timeout value in some tcp implementaton. Can
anybody shed me some light?

Thanks
Kun-chan Lan

1036626828.477241 10.0.0.1.2355 > 192.168.0.2.80: S 12193306:12193306(0)
win 8192 <mss 1460,nop,nop,sackOK> (DF)
1036626831.460768 10.0.0.1.2355 > 192.168.0.2.80: S 12193306:12193306(0)
win 8192 <mss 1460,nop,nop,sackOK> (DF)
1036626831.784822 10.0.0.1.2355 > 192.168.0.2.80: . ack 3335637810 win
8760 (DF)
1036626831.792048 10.0.0.1.2355 > 192.168.0.2.80: P 0:758(758) ack 1 win
8760 (DF)
1036626831.852406 10.0.0.1.2355 > 192.168.0.2.80: . ack 124 win 8638 (DF)
1036626831.852423 10.0.0.1.2355 > 192.168.0.2.80: R 12194065:12194065(0)
win 0 (DF)

timeout value in TCP implementation kunchanl
long delay before closing connection kunchanl
RE: timeout value in TCP implementation kunchanl
RE: timeout value in TCP implementation Mark Allman