[3044] in linux-net channel archive
Tcpdump interpretation
daemon@ATHENA.MIT.EDU (Robert Wuest)
Wed May 29 06:43:01 1996
Date: Tue, 28 May 1996 23:14:10 +0000
From: Robert Wuest <rwuest@ix.netcom.com>
To: Linux Net <linux-net@vger.rutgers.edu>
Hi,
Could someone please tell me just what I'm seeing here?
Why am I ack'ing the same packet several times?
This seems to happen a lot. Is it normal?
( BTW:
A=house.pcmp.caltech.edu.80
B=har-tx1-22.ix.netcom.com.1328
for brevity
)
(My guess)
22:57:58.756450 A > B: . 236544:237056(512) ack 1 win 8192
22:57:58.756450 B > A: . ack 237056 win 31744
22:57:59.106450 A > B: . 237056:237568(512) ack 1 win 8192
22:57:59.106450 B > A: . ack 237568 win 31744
22:57:59.486450 A > B: . 238080:238592(512) ack 1 win 8192 (lost packet?)
22:57:59.486450 B > A: . ack 237568 win 31744
22:57:59.836450 A > B: . 238592:239104(512) ack 1 win 8192
22:57:59.836450 B > A: . ack 237568 win 31744
22:58:00.176450 A > B: . 239104:239616(512) ack 1 win 8192
22:58:00.176450 B > A: . ack 237568 win 31744
22:58:00.536450 A > B: . 239616:240128(512) ack 1 win 8192
22:58:00.536450 B > A: . ack 237568 win 31744
22:58:00.926450 A > B: . 237568:238080(512) ack 1 win 8192 (here is the missing one?)
22:58:00.926450 B > A: . ack 240128 win 30720
Thanks,
Robert
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