The Question is:
Running TCP/IP V5.0, VAX OpenVMS V7.2.
Problems with the TCP/IP connection when the sequence number sent to the VAX reaches the maximum signed int value (2.147.483.647).
Corresponding a sniffer the TCP/IP server (PC) sends seq.no. 2.147.483.167 .. 2.147.483.679 (512 Byte). The VAX acknowledges only seq.no. 2.147.483.167.
PC: 2.147.483.679 .. 2.147.484.191 -> VAX acknowledges 2.147.483.167 again.
That continues until the PC starts to resend the packets beginning with 2.147.483.167, the same procedure restarts until the VAX resets the TCP/IP connection.
Is there any known problem (signed/unsigned int) concerning the VAX TCP/IP V5.0 sequence/ack numbers?
The Answer is :
First, please move to V5.0A -- a similar problem was identified
in TCP/IP V5.0 on OpenVMS VAX, and was then fixed in V5.0A.
If the problem persists, please contact the Compaq Customer Support
Center -- while this report has been passed along to the TCP/IP
Services Engineering team, please contact the support center directly
to report this and to provide any needed additional details.
Please see topic 3799 for a similar (but not directly related)
discussion of sequence numbers.