In this scenario, the client has rebooted and the TAO cache has been reinitialised.
When the client attempts a connection with a server, it finds that the latest CC value received from the server is undefined. Hence it sends a CCnew option to indicate that a three way handshake is needed.
The sequence of segments below conform to the protocol implementation.
win 15928 <mss 1460,nop,nop,ccnew 10> (DF)
devilwood.ece.ul.ie.8888 > elendil.ul.ie.2177: S 139872882:139872882(0)
ack 3066875001 win 17424 <mss 1460,nop,nop,cc 3,
nop,nop,ccecho 10> (DF )
elendil.ul.ie.2177 > devilwood.ece.ul.ie.8888: F 20:20(0) ack 1 win 15928
<nop,nop,cc 10> (DF)
devilwood.ece.ul.ie.8888 > elendil.ul.ie.2177: . ack 21 win 17405
<nop,nop,cc 3> (DF)
devilwood.ece.ul.ie.8888 > elendil.ul.ie.2177: FP 1:31(30) ack 21
win 17424 <nop,nop,cc 3> (DF)
elendil.ul.ie.2177 > devilwood.ece.ul.ie.8888: . ack 32 win 15928
<nop,nop,cc 10> (DF)