Performing a Dynamic Configuration

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. Refer to Chapter 7 “Terminal and Printer Profiles” for more information.

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.

   If you type N, dynamic configuration changes will not take effect now. Your changes will take effect the next time dynamic configuration is invoked, a DTS shutdown/ restart is performed, or the system is rebooted. Dynamic configuration changes can be implemented later by calling DTCCNTRL from the CI prompt any time thereafter. Or you can run NMMGR again and select validate DTS/Link. See the section "DTCCNTRL After NMMGR Exit," for steps on how to invoke the DTCCNTRL command at the CI prompt.

   If you type H, you will see help text describing the options.

   	NOTE: You can suppress the display of the question and have DTS changes become active dynamically, without prompting, by using capabilities within NMSTART as discussed later in this chapter.

3. If you selected Y in step 2 above and the DTS changes you have made are dynamically configurable, no other action is required and changes will become active automatically. You will see a message on the screen indicating that no other actions are required.

   If the DTS changes you have made require additional actions before changes become active, refer to Chapters 5 and 6, step 9, for more information. If this is the case, you will see messages on the screen indicating what actions are required before changes become active.

   Refer to Table 4-1 “Dynamically Configurable Tasks” for a list of configuration changes that can be modified dynamically.

4. After viewing the messages describing what actions are required, if any, enter [RETURN] when you see the prompt:

   (Press RETURN when finished viewing screen contents.)

   You will return to the Validation screen. From here you can make further changes or exit NMMGR.

DTCCNTRL After NMMGR Exit

If you choose not to invoke DTCCNTRL implicitly within NMMGR, you can run the command from the CI prompt at any time after you exit NMMGR. DTCCNTRL requires that you have a minimum of Network Manager (NM) capability.

The command can be entered either without specifying the desired dynamic configuration operation or by specifying it using the syntax outlined below:

Refer to Chapter 5 “Configuring Serial Devices (for Host-Based Management)” and Chapter 6 “Configuring Serial Devices (for PC-Based Management)” for more information on actions required for changes to take effect.

	NOTE: You must have made all desired DTS changes in NMMGR first before invoking DTCCNTRL from the CI prompt.To automatically add/configure a host-based managed DTC to DTS without needing to specify detailed configuration information such as DTC cards/boards and ldevs, refer to Chapter 3 “Automatic Configuration of DTCs” To manage/dynamically configure host-based X.25 links, refer to the Configuring and Managing Host-Based X.25 Links manual.

Using NMSTART

When NMMGR is run, one of the first actions it does is to look for an ASCII file called NMSTART.PUB.SYS. If this file is found, NMMGR will read the contents and attempt to execute the commands in the file.

A command can be placed in the file that will control the display of the question "Do you want DTS changes to become active now (Y/N)?" when validation is complete. The command has the following format:

DTSDYNCONF [OFF|ON|PERMOFF]

If NMMGR is run from a session and starts in maintenance mode, and the DTSDYNCONF command has not been called, DTCCNTRL will not be invoked and the prompt will not appear even if there are DTS changes. If NMMGR is started in screen mode and you switch to maintenance mode at the command line, then the default is OFF.

When DTSDYNCONF is set to OFF, the question and prompt will appear. NMMGR will wait for a response.

When DTSDYNCONF is set to ON, and NMMGR is run from a session, the question will be displayed but DTCCNTRL is invoked without waiting for a response.

When DTSCYNCONF is set to PERMOFF, NMMGR will never display the question or invoke DTCCNTRL.

When NMMGR is run from a job, NMMGR, will run in maintenance mode and accept commands one line at a time. In this case, the "DTS changes" question will not be displayed unless one of the commands is "DTSDYNCONF ON".

LOGDCC and LOGDCCBK Files

When the system rebooted or a DTS shutdown/restart executed, an ASCII file call LOGDCC.PUB.SYS is purged and recreated to log DCC startup console messages, and the results of any dynamic configuration operations. This file acts as a log of all dynamic configuration changes since the last system reboot or DTS restart.

An example of the contents in LOGDCC.PUB.SYS is as follows:

If the system is not rebooted or DTS restart is not done for a long time, the file LOGDCC may become full. If the file becomes full DTCCNTRL renames LOGDCC.PUB.SYS to LOGDCCBK.PUB.SYS. If LOGDCCBK already exists it will be purged. DTCCNTRL will then recreate LOGDCC so that this file will always contain the most current history of dynamic configuration changes.

Dynamic Configuration Status

You can also use DTCCNTRL to check the status of the last dynamic configuration. To see the status of the last dynamic configuration, type the DTCCNTRL command at the CI prompt either without specifying the desired operation or by specifying it using the syntax outlined below: