IST796I

Explanation
 VTAM® issues
this message when the value specified for the HOSTSA start option
exceeds the value of option.
 option is
the start option name and is either MAXSUBA or MXSUBNUM.
 MAXSUBA is the highest subarea value that can be assigned
to any node in this network that communicates with pre-ENA nodes.
 This message requires no action if your network supports extended
network architecture (ENA). ENA was implemented in VTAM Version 3 and NCP Version 4.

MXSUBNUM is the maximum subarea number supported by another
network to which this host is connected. Therefore, if your host subarea
number is greater than MXSUBNUM, you cannot communicate with the other
network.

System action
  If option is MAXSUBA, processing continues.
If option is MXSUBNUM, VTAM issues message IST1311A to prompt for valid
values of HOSTSA and MXSUBNUM, and waits for a response.

Operator response
  If option is MAXSUBA, this message requires
no action if your network supports extended network architecture (ENA).
If your network contains pre-ENA nodes, save the system log for problem
determination.
If option is MXSUBNUM, enter valid values
for HOSTSA and MXSUBNUM when prompted by IST1311A.  You do not
have to enter both values. VTAM does
not ignore the value of HOSTSA. However, you can enter a new value
of HOSTSA that is smaller than the initial value of MXSUBNUM.
 Message
IST1311A is repeated until HOSTSA's value does not exceed MXSUBNUM.

System programmer response
 If option is MAXSUBA,
review the VTAM start options
and their relationships. To communicate with pre-ENA nodes, the maximum
HOSTSA value cannot exceed the MAXSUBA value.
 See the z/OS Communications Server: SNA Resource Definition
Reference for more information on the MAXSUBA and MXSUBNUM
start options. 

Routing code
 2

Descriptor code
 5 