Specifications

34 Getting Started with the McDATA Intrepid FICON Director
For all FICON features using repeaters, the end-to-end distance between the FICON channel
and the FICON Director port can be up to 100 km. The same end-to-end distance is also
available between the FICON Director port and the control unit port. However, the overall
end-to-end distance between the FICON channel and control unit should not exceed 100 km.
3.8.2 FICON channel to control unit characteristics
The control unit vendor must provide all the control unit addressing and connectivity
characteristics, as these affect how the control unit can be configured in a FICON
environment. The control unit vendor should also provide connectivity recommendations to
allow the full exploitation of the control unit capability in a FICON environment.
The following items are dependent on the control unit characteristics:
򐂰 Number of installed FICON adapters at the control unit
򐂰 Number of logical paths supported by the control unit at each FICON adapter
򐂰 Number of logical paths supported by the control unit, when there is only one control unit
function within the physical control unit
򐂰 Number of logical paths supported by each logical control unit within a physical control unit
򐂰 Number of logical control units supported and the LCU address for each LCU
򐂰 Number of concurrent I/O transfers per physical control unit
򐂰 Number of concurrent I/O transfers per logical control unit
򐂰 Number of devices and device unit addresses (UAs) supported per logical control unit
Some devices may be supported by more than one unit address (UA), each device unit
address being supported by a different device number (this is the case for the IBM ESS
control unit that supports Base and Alias device addresses). This function is known as
Parallel Access Volumes (PAV).
򐂰 For each LCU, the base device unit address (UA) and address range per LCU