Supported Topologies; Point-To-Point Topology; Switched Point-To-Point Topology; Ficon/Zhpf Channel Adapter Support For Logical Paths (Example 2) - HP XP20000/XP24000 Operation Manual

Maximum number of CU images per storage system is 64.
Maximum number of logical paths per storage system is 131,072 (2048 X 48).
Figure 7 FICON/zHPF channel adapter support for logical paths (example 2)
.

Supported topologies

FICON and FICON/zHPF support the same topologies.

Point-to-point topology

A channel path that consists of a single link interconnecting a FICON channel in FICON native (FC)
mode to one or more FICON control unit images (logical control units) forms a point-to-point
configuration. A point-to-point configuration is permitted between a channel and control unit when a
single control unit is defined on the channel path or when multiple control unit images (logical control
units) share the same N Port in the control unit. A FICON channel point-to-point configuration is shown
in the following figure.
Figure 8 Example of a point-to-point topology
.

Switched point-to-point topology

A FICON channel in FICON native mode connects one or more processor images to a Fibre Channel
link, which connects to a Fibre Channel switch, and then dynamically to one or more FC switch ports
(internally within the switch). From the switch ports, another Fibre Channel link to FICON CU ports
interconnects with one or more control units and/or images (logical control units). This forms a switched
point-to-point configuration, as shown in
Multiple channel images and multiple control unit images can share the resources of the Fibre Channel
link and Fibre Channel switch, permitting multiplexed I/O operations. Channels and control unit links
can be attached to the Fibre Channel switch in any combination, depending on configuration
requirements and available Fibre Channel switch resources.
20 FICON/zHPF and ESCON host attachment
Figure 9.