Configuring and Managing Host-Based X.25 Links - Edition 6 (36939-90057)

Managing Networks with DTCCNTRL
NMCONFIG and NMCONFIX Files
Chapter 7
156
NMCONFIG and NMCONFIX Files
Dynamic Configuration uses both files NMCONFIG.PUB.SYS and NMCONFIX.PUB.SYS to
manage the devices created by the DTS subsystem. When users wish to make any
dynamic change, NMMGR will be used to modify the configuration in
NMCONFIG.PUB.SYS. When DTCCNTRL is invoked, either within or from outside of
NMMGR, NMCONFIG will be compared to NMCONFIX and the desired changes will be
made to the system configuration. When the operation has completed successfully, the
changes will be written to NMCONFIX. The configuration in NMCONFIX will always
match the actual configuration of the DTS subsystem.
If any errors are encountered, then information will be saved in the NMCONFIG file
that will allow DTCCNTRL to be re-invoked to complete the changes at a later time. If an
operation is partially successful, then those changes that are successful will be written to
NMCONFIX. For example, if you delete two ldevs and the second ldev can't be deleted
because it is in use, then DTCCNTRL will save information that will allow the second ldev
to be deleted once the device is no longer in use.
CAUTION If ANY other configuration file is copied to NMCONFIG.PUB.SYS or NMCONFIX.PUB.SYS
then dynamic configuration will be disabled until a DTS shutdown and restart is done or
the system is rebooted. This includes other files from the same system or files copied
from other systems.
If there is some operation that fails, and you wish to undo the change, you can use
NMMGR to change the appropriate screens back to what they were and then invoke
DTCCNTRL.
Follow the steps below to dynamically configure DTS changes. Refer to chapter 3, for
more detailed steps on the DTS configuration process using NMMGR for host-based and
PC-based DTC management, respectively.
1. Run the NMMGR program and make all desired DTS configuration changes. The
network management configuration file must be NMCONFIG.PUB.SYS for the
configuration changes to become active dynamically.
NOTE If you are changing profile characteristics, you can see which ldevs and DTCs will be
affected by the change by pressing the
[Assoc Ldevs]
function key on the profile
screen corresponding to the profile you are changing. After pressing this key, you will
see a list of all ldevs using this profile in the DTCs configured in DTS.
2. After successful validation and cross-validation, NMMGR will prompt you as to
whether you want DTS changes to take effect now. The following prompt will appear:
Do you want DTS changes to be become active now (Y/N)?
Y = all changes made take effect now
N = all changes made will take effect upon next dynamic configuration or system boot
H = help
>
If you type Y, dynamic configuration changes will take effect now. NMMGR calls
DTCCNTRL which dynamically implements the DTS changes made in NMMGR.