[mod.protocols.tcp-ip] TCP retransmission header question

mknox@NGP.UTEXAS.EDU (Margaret H. Knox) (03/06/87)

This is probably a simple question for most of the TCP hackers out
there, but we cant agree on the information in the TCP standard.

Case:  A number of packets are sent and placed on the retransmission
	queue awaiting acknowledge.  Then a packet is received 
	acknowledging SOME of them, and also sending more data.
	We now send another packet, with a new acknowledge because
	of the additional data just received.

Question:  If it becomes necessary to resend the packets still on the
	retransmission queue, should the headers be updated to reflect
	the new acknowledge.  The alternative is to send the packets
	exactly as they were sent originally.  This has the interesting
	affect of causing us to send an acknowledge of a LOWER value
	than one just previously sent.

Answer: ???