Visara FEP-4600 Planning Guide - Manual (Page 19)

37x5 to FEP-4600 Migration and Planning Guide
707117-003 2-1
Chapter 2. Support of PU 2.0 Platforms
The FEP-4600 supports PU 2.0 platforms by means of a PU 2.0 Gateway function. With
ESCON as the upstream connection, PU 2.0 platforms are supported on a variety of
downstream connections. These include:
 SDLC
 Ethernet (LLC2)
 Token Ring (LLC2)
 Ethernet (IP using DLSw)
Two different approaches are offered on the host side for defining the downstream PUs to
VTAM. The following illustration shows what the network may look like.
The two options are partly dependent upon the network architecture of the downstream
PU, partly on the ESCON interface used, and partly on redundancy requirements.
Option 1: Define Local (Channel) Major Nodes for each remote PU2. (This option is only
supported over ESCON using the older Luminex ESCON card – no longer available, and
is not supported over FICON.)
Option 2: Define an XCA Major Node and use Switch Major Node definitions for each
PU2 (supported over ESCON and FICON).
PU 2.0
IP IP
PU 2.0
PU 2.0
PU 2.0
FEP-4600
IBM S390 IBM z990
Director
PU 2.0
PU 2.0 traffic
Via LLC2 or DLSw
Router
SDLC
LLC2
LLC2
DLSw