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TCP/IP Send-Q fills up

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TCP/IP Send-Q fills up

Postby oburak » Thu Apr 15, 2010 2:10 pm

I have a QNX box talking to a Windows XP box through TCP/IP over Ethernet link. The connection is noisy and I see some packet losts, retransmissions happening on the link. After a while QNX box stops sending any packets and Send-Q buffer start increasing in size. QNX box still responds with ACKs to received packets from the Windows XP box.

Could anyone tell me what could be the reason for this?

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Postby seanb » Thu Apr 15, 2010 2:52 pm

The other end isn't reading (it's recv Q has filled) and therefore
the window it's advertising on the wire is 0.

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