ESCON CTC with shared channels
A fully redundant any-to-any CTC configuration consists of two
sets of CTC minimum configurations, each associated with a separate
ESCON Director. CTC communication workload between System A and System
B is balanced between four CTC connections. All the channel paths
are shared. See Figure 1.
For recommendations for numbering CTC control units and devices to
simplify CTC configurations, see the ESCON and FICON Channel-to-Channel
Reference, SB10-7034.
Note: All shared CTC examples within
a single CPC exclude an LP from communicating with itself. This exclusion
is required for some subsystems (for example, XCF). Other subsystems
might not have this restriction and might support the communication
of an LP with itself.
