Control unit considerations

Consider the following factors concerning the allocation of logical paths by control units:
  • Control units allocate logical paths dynamically on a first-come-first-served basis.
  • Control units do not manage the allocation of logical paths. They allow channels to compete for logical paths until all the logical paths of the control unit are used.
  • Control units vary in the number of logical paths they support. See Table 1.
  • Some control units that support a mix of parallel and ESCON ports can reduce the number of logical paths allocated to ESCON channels because they reserve a logical path for each parallel port.