Ted, you're right that a CMC was never required. It was something that became somewhat a standard practice in installations with large SNA networks. Creating a single system or LPAR that acted as a central network hub for SNA connections, created a more stable network environment because there was no other "work" performed on that machine that could jeopardize the stability. It just managed the network with connections physically flowing through it to other machines in the network. If any of the "other" machines took an outage, only connections to that specific machine suffered and the rest of the network continued normal operations.
I never saw any documentation on using a CMC or anything indicating it was a "supported" environment. If all the hardware and software components were at supported levels, of course it was supported. It was just a commonly used concept for creating a stable network as far as I know. In a TCP/IP network you don't have the same challenges that you do in a SNA network. Typically a system of routers and switches take care of the traffic routing to the proper final destination. Since there is no single point of failure, I don't see that a CMC machine will really buy you anything. It could be used for something like having all TN3270 sessions connect to one central machine and then using SNA connections to distributed applications, but for protocols such as FTP it would not really help you in any way. Chuck Arney illustro Systems International, LLC http://www.illustro.com Access 3270 data from anywhere with z/XML-Host Access 3270 apps from the web with z/Web-Host Access CMS minidisks from OS/390 or VSE with CMSACCess Voice: 972-296-6166 > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of Ted MacNEIL > Sent: Thursday, August 04, 2005 7:00 PM > To: IBM-MAIN@BAMA.UA.EDU > Subject: Re: TCP/IP and CMC? > > ... > >When you use TCP/IP on the mainframe is a CMC still required? > No. > > My understanding of CMC is a seperate LPAR to front-end communications. > ... > > I'm sorry. > I asked the wrong question in my frustration with trying the get to the > answer. > > Of course, a CMC is never 'required'. > But, is it supported in a TCP/IP environment. > Management's goal is to get rid of SNA. > Will we still be able to use a CMC? > > (That was my original [as yet, unanswered] question) > > Also, where is CMC management/support/etc documented? > ---------------------------------------------------------------------- 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
