I have been troubleshooting a problem and have seen something I don't understand. If host A sends data to host B and host B acks the data, isn't host A supposed to increment its seq #. Here is an actual tcpdump. Host A is 192.168.133.21 and B is 10.10.10.12. You'll notice host A is pushing 1 byte of data and Host B is acking it, yet host A's seq never increments. Is this normal?
17:56:46.563514 O 192.168.133.21.5055 > 10.10.10.12.1617: P 2653258020:2653258021(1) ack 808512610 win 8760 (DF) 17:56:46.604328 I 10.10.10.12.1617 > 192.168.133.21.5055: . ack 2653258021 win 17520 (DF) 17:58:20.327090 O 192.168.133.21.5055 > 10.10.10.12.1617: P 2653258020:2653258021(1) ack 808512610 win 8760 (DF) 17:58:20.368296 I 10.10.10.12.1617 > 192.168.133.21.5055: . ack 2653258021 win 17520 (DF) 17:59:54.090651 O 192.168.133.21.5055 > 10.10.10.12.1617: P 2653258020:2653258021(1) ack 808512610 win 8760 (DF) 17:59:54.132170 I 10.10.10.12.1617 > 192.168.133.21.5055: . ack 2653258021 win 17520 (DF) 18:01:27.854289 O 192.168.133.21.5055 > 10.10.10.12.1617: P 2653258020:2653258021(1) ack 808512610 win 8760 (DF) 18:01:27.895254 I 10.10.10.12.1617 > 192.168.133.21.5055: . ack 2653258021 win 17520 (DF) 18:03:01.618100 O 192.168.133.21.5055 > 10.10.10.12.1617: P 2653258020:2653258021(1) ack 808512610 win 8760 (DF) 18:03:01.658892 I 10.10.10.12.1617 > 192.168.133.21.5055: . ack 2653258021 win 17520 (DF) 18:04:35.381698 O 192.168.133.21.5055 > 10.10.10.12.1617: P 2653258020:2653258021(1) ack 808512610 win 8760 (DF) 18:04:35.422538 I 10.10.10.12.1617 > 192.168.133.21.5055: . ack 2653258021 win 17520 (DF) 18:06:09.145358 O 192.168.133.21.5055 > 10.10.10.12.1617: P 2653258020:2653258021(1) ack 808512610 win 8760 (DF) 18:06:09.186227 I 10.10.10.12.1617 > 192.168.133.21.5055: . ack 2653258021 win 17520 (DF) 18:07:42.909048 O 192.168.133.21.5055 > 10.10.10.12.1617: P 2653258020:2653258021(1) ack 808512610 win 8760 (DF) 18:07:42.949850 I 10.10.10.12.1617 > 192.168.133.21.5055: . ack 2653258021 win 17520 (DF) thanks Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49535&t=49535 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
