Many TCP retransmission and tcp out-of-order found for slow connection

Hello,

I was troubleshooting a webpage connection issue and got many "tcp retransmission" & "tcp out-of-order", and the actual connection was hang for over 100 seconds before the page could be shown. Below are some of the examples:

https://drive.google.com/open?id=0BzRlJRE0N1eMMW5Lenp2dHVNa0k

alt text Anyone has any idea?

Thanks in advance.

tcp_retransmission

asked 21 Aug '15, 21:25

Illidan Stor...
6●1●1●3
accept rate: 0%

edited 21 Aug '15, 23:07

mrEEde
3.9k●15●22●70

One Answer:

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All packets are inbound and all packets are traced twice and so are not real retransmissions. Looks like you need to de-duplicate the trace using editcap -D to get rid of the false alarms.

Regards Matthias

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answered 21 Aug '15, 23:05

mrEEde
3.9k●15●22●70
accept rate: 20%

Hi mrEEde,

Thanks for the reply, would check why there was only uni-directional traffic and revert.

(23 Aug '15, 07:11) Illidan Stor...

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tcp_retransmission ×16

question asked: 21 Aug '15, 21:25

question was seen: 1,467 times

last updated: 23 Aug '15, 13:33

Many TCP retransmission and tcp out-of-order found for slow connection

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You have a trillion packets.

You need to see four of them.

Don't have Wireshark?

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