Mark

Apart from the *genuine* opportunity for misunderstanding over the use of USS here - a USS message, specifically USS message 10, is what you may very well receive when you connect to what I believe Natarajan refers to as the "z/OS stack", meaning the Communications Server IP component TN3270 server I expect, rather than what he refers to as the "USS TCP/IP stack", meaning "otelnet" I expect - I think Natarajan is accessing his two different TELNET services in the preferred manner, namely by means of a VIPA each.

Of course, I'm a touch confused over why he images there are two "stacks" involved here since the underlying IP instance could be the same for both servers. It may be he is running two instances of the CS IP component in the same z/OS image in which case he's a bit off the topic under discussion - as I understand it.

Chris Mason

----- Original Message ----- From: "Natarajan Mohan" <[EMAIL PROTECTED]>
Newsgroups: bit.listserv.ibm-main
To: <IBM-MAIN@BAMA.UA.EDU>
Sent: Saturday, August 04, 2007 12:26 AM
Subject: Re: OMVS


I am not sure how it would work with same IP address to both z/OS stack and USS TCP/IP stack. I have defined the same way here, except I have two VIPA addresses. My primary VIPA is TCP/IP on z/OS host and secondary vipa address is bind to OMVS services. When you go to a line mode telnet and key in the seondary VIPA, it takes you straight into USS and you get a standard unix C Shell or Bourne Shell (if installed and configured). That would allow you to share the ports not IP address.

Natarajan

Mark Zelden <[EMAIL PROTECTED]> 8/3/2007 1:45 PM >>>
On Fri, 3 Aug 2007 10:47:56 -0700, Edward Jaffe
<[EMAIL PROTECTED]> wrote:

For services we've configured more recently, we share the *same* port
number between the native z/OS server and the z/OS UNIX server by using
VIPA. For example, here's our TCPIP port definition for REXECD/RSHD:

512 TCP OMVS BIND 192.168.1.129 ; z/OS Unix REXECD
514 TCP OMVS BIND 192.168.1.129 ; z/OS Unix RSHD
512 TCP RXSERVE             ; Remote Execution Server
514 TCP RXSERVE             ; Remote Execution Server

192.168.1.129 is the VIPA address. This same port sharing technique
ought to work for any server, including telnet.


So if I opened a dos window on my win-doze system and wanted to use
telnet to get into z/OS UNIX (or used a telnet client), how would it know
where to go to?

Mark
--
Mark Zelden

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