MAXSUBA start option


   .-MAXSUBA--=--15---------------------.   
>>-+------------------------------------+----------------------><
   '-MAXSUBA--=--maximum_subarea_number-'

dependencies:

required if ENA not supported

range:

1–255

Specifies the highest subarea value that can be assigned to any node within this network for communicating with NCPs and SSCPs that do not support extended network addressing (ENA).

This operand is required if any host or NCP in the network does not support ENA.

If you code MAXSUBA, the value must be the same for all nodes (including NCP) in the same network.

Note: If you have coded a node to function solely as an end node or network node (NODETYPE=EN or NN), then MAXSUBA should not be coded because it has no effect. If you code it, error messages will be issued, but the node will come up.

The MAXSUBA value is rounded up to the next higher 2ⁿ-1. For example, if MAXSUBA is coded as 10, the next higher 2ⁿ-1 is 15. Therefore, VTAM® uses a MAXSUBA value of 15.

In networks that have no pre-ENA nodes, or where you do not want to communicate with any such nodes, you do not need to code MAXSUBA.

See z/OS Communications Server: SNA Network Implementation Guide for MAXSUBA usage considerations.