Ask Your Question

Revision history [back]

Syn and Immediate Out of Order

Have a customer who experiences random slowness and packet loss using a cloud application. The issues seems to be return traffic. Routes are good. They provided a capture which shows that the three way handshake never completes. A syn goes out from client, then there is an immediate out of order from client and then the client send an ack. TLS begins handshake begins, bytes in flight keeps climbing until it goes back to 0 and does the same process over again. I am puzzled.

There is zero traffic in this conversation that comes back from the server. It is all unidirectional from the client. I cannot upload a pic unfortunately.