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Is TCP output queue blocking keep alive?

user505 Published in April 21, 2018, 4:01 am

I have the following situation: A TCP connection is established. The client (with linux running) has keep-alive activated and it works as required.

The problem is now: When I unplug the ethernet cable on the client side between a request from the server and the answer from the client, the keep-alive stops working.

I see from netstat that the Send-Q is filled. Is the send-q related to the TCP keep-alive? Is there a way to clear this queue?

Regards, Frogtime

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