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Chris Mason ----- Original Message ----- From: "Dave Kutz" <[EMAIL PROTECTED]> Newsgroups: bit.listserv.ibm-main To: <[email protected]> Sent: Friday, 27 October, 2006 2:38 PM Subject: VTAM and GCN > I am not sure if this list supports VTAM questions or not. If not, please > ignore and sorry. If there is a comparable list that folk bother about which covers VTAM, someone please let us all know. It's my understanding that, as long as the topic has something to do with "IBM mainframes", then it may legitimately be aired here. In something of an answer to my own implied question, there *is* another list folk bother about which may be observed sometimes to cover VTAM, namely and paradoxically IBMTCP-L. The reason is that the topic to be discussed is Enterprise Extender, HPR over IP or IP-DLC and the problem may well be more VTAM than IP - as I judge with this post, in fact. > > But if it does, I am trying to setup a Global Connection Network across an > EE-EE connection with a distant network. > The distant side when they do a D NET,APING to my VTAM, they are able to > attempt to create a dynamic PU based on following messages. > IST1576I DYNAMIC SWITCHED MAJOR NODE ISTDSWMN CREATED > They see messages with the CNV...... PU also. > > But when I do an APING back to their VTAM, I don't see any messages about > creating this CNV... dynamic PU. > > I verified my VTAM XCA and SWMN with IBM, but they don't see anything > incorrect. Unfortunately I don't have experience with a Global Connection Network (GCN) (only possible with Enterprise Extender I believe) but let's clear the way to the problem first. Do the APINGs work? In other words are you worried about not seeing the message IST1576I concerning the dynamic creation of the ISTDSWMN node or is this perceived as a symptom of why the APING doesn't work? I'll assume that the real problem is that the APINGs don't work. After all you wouldn't have bothered IBM with the relatively trivial issue of a message not appearing or, if you had, you would have had a nest of fleas in your ear. <g> The reason I expect to be able to help is that I know a bit about dynamic so-called "PUs". The ISTDSWMN major node is created whenever VTAM needs to create the control blocks associated with a PU statement dynamically. This can happen for a number of reasons and not just in the case of a GCN. At this point I started to do a bit of research and from notes I made of a thread "EE Activation Steps" earlier this year I see that you already use Enterprise Extender with Extended Border Node (and you posted in the IBMTCP-L list so you already know that Enterprise Extender problems - even "issues" - tend to get aired there). This makes you already quite well experienced in these more advanced VTAM configurations. Specifically I'd expect you necessarily already to have an ISTDSWMN major node created. Does such a name appear in a D NET,MAJNODES display? Perhaps you could post the definitions associated with Enterprise Extender from the two systems - disguising innocent names where necessary of course - so that we are all better informed. Having requested that, I remind myself that PU definitions need to be created dynamically - which is what ISTDSWMN is all about - only where PU definitions have not been created manually, this being a possible explanation for the reported difference in behaviour in what are supposed to be the partner systems. > > I was wondering if someone that has setup a GCN could provide some insight > where to look. I'm not even sure if the problem is my VTAM, the remote > VTAM, or the network in between that we both connect to in order to reach > each other. If the two Communications Server IP entities can communicate using the original IP PING, then the problem cannot be in the IP network. This leaves the Communications Server IP and SNA components or, more precisely, the definitions relating to the Enterprise Extender pseudo-link. Incidentally, don't forget to check any VTAM Start Options which may be providing "global" - no connection to GCN (sorry for the totally unintended pun) - parameters which affect the specific definitions. I'll get this off now and continue with the research. Meantime perhaps someone who's actually done a GCN may be able to help. > > > Dave Kutz ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
