Re: Miscalculated TCP ACK ?

On 08/22/2011 01:49 PM, Eric Dumazet wrote:

Le lundi 22 août 2011 à 13:05 -0500, Gabriel Beddingfield a écrit :

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On Mon, Aug 22, 2011 at 12:19 PM, Daniel Baluta[off-list ref]  wrote:

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It appears to me that the ACK is off-by-one (should have been 27676).
The server replies again with retransmissions.  This is with several
kernel versions on local machines, ranging from 2.6.31 to 2.6.38.

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Not a bug if frame carried a FIN

The server packet had the FIN bit set.

then its fine.

Thank you!

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I clipped the conversation to the vicinity of the problem.

This sounds as a TSO bug, maybe driver/NIC related

What is the NIC/driver used on your server ?

New news:  If I remove my router (Linksys WRTU54G-TM), the problem goes away.

Thank you guys for your helpful insights. :-)

-gabriel