March 2007
Beginner
526 pages
13h 53m
English
book
Introduction to the New Mainframe: z/VSE Basics
by Wolfgang Bosch, Hans Joachim Ebert, Helmut Hellner, G. M. (Jerry) Johnston, Wilhelm Mild, Ingolf Salm, Joerg Schmidbauer, Martin Walbruehl, Mike Ebbers
Content preview from Introduction to the New Mainframe: z/VSE Basics
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Chapter 17. Network communications on z/VSE 413
A PU exists in each node of an SNA network to manage and monitor the
resources (such as attached links and adjacent link stations) of the node.
The PU exists either within the device or within an attached controlling device.
VTAM must activate the PU before it can activate and own each LU attached to
the PU.
Even the mainframe is a type of PU, with attached LUs of which CICS/TS is an
example. There are three types of PUs:
PU Type 5 is in the mainframe.
PU Type 4 is a wide-area network communication controller (CC).
PU Type 2 is a peripheral communication controller (CC). These can be
directly attached to the mainframe or to a PU Type 4.
17.4.1 Network topologies supported by VTAM
Although TCP/IP ...
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