Visara FEP-4600 Planning Guide - Manual (Page 95)

37x5 to FEP-4600 Migration and Planning Guide
707117-003 8-1
Chapter 8. Providing Channel-to-Channel
Links
The FEP-4600 can be used to provide Channel-to-Channel connections between LPARs
for SNA traffic. These LPARs can reside on the same CPU, different CPUs, and even on
two CPUs that are remote from each other. CTC links can be provided between any
combination of ESCON and FICON channels. See the diagram and example below.
The FEP-4600 can provide CTC connections between all LPARs in the diagram if
needed, even if the LPARs are supporting different SNA networks. Each connection
between two LPARs is accomplished by configuring a PU4 circuit through the FEP-
4600. You can achieve this by creating a CNTLUNIT statement for each PU4 connection
in each LPAR to each other LPAR. The total number of circuits on the FEP-4600
required to support a single Explicit Route between each LPAR in a multi-LPAR system
can be represented by the mathematical expression:
(n-1) + (n-2) + … (n-(n-1)) where n=total number of LPARs
The following table illustrates this example.
TEST1
SA01
PROD2
SA02
PROD3
SA03
CPU
FEP-4600
CPU
DRS1
SA05
CPU
PROD4
SA04
IP Network IP Network
FEP-4600
ESCON
Director
ESC3
ESC1