The LLC token-ring application of LAN Network Manager communicates with the OS/2 agent to manage the CMIP-based IBM 8230 Model 1 and Model 2 Controlled Access Units (concentrators). Using LAN Network Manager, you can display a graphical view of a concentrator, display information and status for a specific concentrator, enable a concentrator for a program update, and control network access for the adapters attached to the concentrator.
This chapter contains the following topics:
The 8230 Controlled Access Unit uses a version of the IBM heterogeneous LAN management (HLM) protocol to communicate with the OS/2 agent. A LAN Network Manager program can display information about a concentrator, and, if the OS/2 agent registers with a concentrator on behalf of LAN Network Manager, LAN Network Manager can perform actions on that concentrator.
When a concentrator is started or reset, it announces its presence on the network by sending a function present event. If a controlling OS/2 agent receives this notification from a concentrator that is in its managed domain, OS/2 agent then attempts to register with the concentrator by sending a register request.
When the OS/2 agent program attempts to register a concentrator, the concentrator verifies the password. If the password matches, the OS/2 agent program registers with the concentrator. During resynchronization, OS/2 agent confirms that the concentrator is still registered by sending a register check.
When the OS/2 agent program is started or restarted, the program issues a register request to concentrators that are already active.
After the concentrator is registered, LAN Network Manager can:
If you change the password, record the new password. If the OS/2 agent loses communication with the concentrator, another OS/2 agent will have to contact the concentrator and will need the new password.
The concentrator sends events to the OS/2 agent program (to which it is registered) to indicate changes in the following:
The concentrator also informs the registered OS/2 agent program of the following conditions, which are passed on to LAN Network Manager as traps:
The OS/2 agent program can remove any adapter that is attached to a concentrator, but the concentrator ignores a force-remove command that is sent to one of its adapters (PO, PI, or S).
The concentrator registers with only one OS/2 agent at a time. If the password does not match, the OS/2 agent program deregisters the concentrator. The concentrator becomes unregistered when one of the following occurs:
If the concentrator sends an event to the OS/2 agent program and does not receive a confirmation after six attempts, the concentrator assumes that it is no longer registered and again announces its presence on the network to the OS/2 agents that are active on the domain. The concentrator does not send unsolicited events to the OS/2 agent program to ensure that it is still registered.
An LAN Network Manager program can retrieve information from an unregistered concentrator but it cannot set concentrator parameters or change its status. When a concentrator is unregistered, LAN Network Manager can receive and display the following information:
If the registered OS/2 agent program is terminated or is isolated from the concentrator because of a ring fault, so that the concentrator is not deregistered, the only way for another OS/2 agent program to register with the concentrator is for the concentrator to send an event; for example, by an adapter insertion. If the event is not confirmed by the registered OS/2 agent program, the concentrator considers itself deregistered and can be registered by any other OS/2 agent program with which it can communicate.
When a segment is in a wrapped condition, the segment is using its backup path. When the wrapped condition recovers, the status of the segment might remain wrapped for up to six minutes. The status of a segment is wrapped when:
Use the Add Concentrator Definition window to define a Controlled Access Unit (concentrator) in your network. In this window you can specify an identifier (ID) for the concentrator and enter information about the concentrator's physical location.
You can also define as many as four modules for the concentrator by using the toggle buttons on the window. Selecting one or more of the modules brings up an Add Port Definition window for each module.
To add a concentrator definition, follow these steps:
The Add Concentrator Definition window is displayed.
Specify information about each of the ports on a module with the Add Port Definition window. A concentrator supports as many as four modules; each module supports up to 20 ports. As part of the module definition, you can enter information about the ports that indicate their location by building and room number.
To define one or more ports in a module, follow these steps:
The Add Port Definition window is displayed.
Use the Add Concentrator Qualifier window to specify qualifiers that are to be managed by LAN Network Manager. A qualifier is a segment number that represents a segment which contains a concentrator but that may not be connected to the OS/2 agent by a linked bridge. Qualifiers are provided by the OS/2 agent program to enable support of 8230 concentrators that are attached on the other side of routers.
To add a definition for a concentrator qualifier, follow these steps:
The Add Concentrator Qualifier window is displayed.
Using the Delete Concentrator Qualifier window, you can delete a concentrator qualifier that you previously defined. A qualifier is a segment number that represents a segment which contains a concentrator but that may not be connected to the OS/2 agent by a linked bridge. Qualifiers are provided by the OS/2 agent program to enable support of 8230 concentrators that are attached on the other side of routers.
To delete a definition for a concentrator qualifier, follow these steps:
The Delete Concentrator Qualifier window is displayed.
Open a Concentrator submap to display a graphical representation of the concentrator. Points of attachment and other physical features of the hardware are recognizable in the submap, and managed elements of the concentrator are represented by icons. The icons give you access to the managed elements of the device and to the stations inserted into the device.
To display a Concentrator submap, double-click on a concentrator icon in a Segment submap. The Concentrator submap is displayed.
The top portion of the graphical representation of the concentrator includes up to three diamond-shaped icons, representing the primary-in, primary-out, and secondary adapters of the concentrator. Directly to the right of the top portion of the Concentrator submap is a square icon that represents the concentrator itself.
The remaining portions of the submap represent the modules of the concentrator. As many as four modules can be connected to a concentrator and represented in the submap. The diamond-shaped icons to the right of each module represent that module.
Each module can contain up to 20 ports. The ports in a module are represented by a pair of icons. The diamond-shaped icon to the left of each pair represents the port. If a device is connected to a port, it is represented by another icon directly to the right of the port icon. The shape of the icon to the right indicates the type of device that is connected to the port:
You can access management windows for each device represented in the submap by selecting the device and then using the LAN pull-down or context menu to select the type of information you want to see for that device. You can also double-click on the icons that represent stations or ports to open a Node submap for the station or port.
| Note: | If you change the access control parameters to make access control active, the Concentrator submap contains the most recent information before access control is activated. |
To view a list of the concentrators that are defined in your network, use the List of Concentrators window. This window displays a scrollable list of defined concentrators and the following information for each:
The list of concentrators includes concentrators that are currently active and those that have been defined but are not active. The concentrators on the window are listed in order of concentrator ID.
To display a list of the defined concentrators in your network, select Concentrators from the Lists pull-down menu on the LNM OS/2 Agent Configuration window.
Use the List of Concentrators window to register or deregister a concentrator. To register or deregister a concentrator, select the concentrator, then select the Register or Deregister push button. See Registering with a Concentrator for more information about registering and deregistering concentrators.
To delete a concentrator definition using the List of Concentrators window, select the concentrator, then select the Delete push button.
The Concentrator Profile window displays information about the current operation and configuration of the Controlled Access Unit (concentrator). In addition to providing such general information as the attached segment number and the registration status, this window displays the adapter addresses for the primary-in, primary-out, and secondary adapters of the concentrator. The window also indicates the status of modules that are attached to the concentrator.
If the concentrator you selected is not active, or if the query is not successful, the status displayed in this window includes the information available from the last access to that concentrator.
To display a concentrator profile, select the concentrator, then select Profile from either the LAN pull-down menu or the context menu. If the concentrator you selected is not active, or if the query is not successful, some fields on the window are blank.
You can navigate directly to the following concentrator windows by
selecting one of these choices from the Navigation pull-down menu on the
Concentrator Profile window:
| Select: | To navigate to: |
|---|---|
| Configuration | Concentrator Configuration window |
| Fault | Concentrator Fault window |
The Concentrator Configuration window provides location and status information about the Controlled Access Unit (concentrator). The window displays the concentrator identifier (ID) for the resource, and you can add or change the text in the location field to reflect current configuration.
To display the Concentrator Configuration window, select the concentrator for which you want configuration information, then select Configuration from either the LAN pull-down menu or the context menu.
You can select the following actions from the Actions pull-down menu on the
concentrator Configuration window:
| For information about: | Read: |
|---|---|
| Reset | Resetting the Concentrator |
| Code Update | Enabling Program Update |
| Delete definition | Deleting a Concentrator Definition |
| Register | Registering a Concentrator |
| Deregister | Deregistering a Concentrator |
| Wrap forced by OS/2 agent | Changing the Wrap State for a Concentrator |
You can navigate directly to the following concentrator windows by
selecting one of these choices from the Navigation pull-down menu on the
Concentrator Configuration window:
| Select: | To navigate to: |
|---|---|
| Profile | Concentrator Profile window |
| Fault | Concentrator Fault window |
To reset the selected concentrator, select Reset concentrator from the Actions pull-down menu on the Concentrator Configuration window.
Resetting the concentrator can disrupt normal network activity.
To update the microcode for the selected Controlled Access Unit (concentrator), use the Concentrator Code Update window. The window displays the identifier (ID) of the concentrator and its location, and you can specify the name of the program to be loaded and the adapter address of the loader device.
This option enables the concentrator for updates but does not load the program file into the concentrator. The option enables a concentrator under one of the following conditions:
Under either of these conditions, the concentrator then initiates the update of program code from the loader device.
To enable a selected concentrator for a program update (to update the concentrator with new code), select Code Update from the Actions pull-down menu on the Concentrator Configuration window.
The concentrator wraps while loading and is inoperative until the program has been updated. As a result, if you are loading more than one concentrator, a concentrator that you are loading might break the path between the remote program loader and other concentrators that you are loading. To avoid problems when loading concentrators on the same segment, load the concentrators one at a time, ensuring that the program update of one concentrator is complete before you begin to update the program of the next concentrator.
You can navigate directly to the following concentrator windows by
selecting one of these choices from the Navigation pull-down menu on the
Concentrator Code Update window:
| Select: | To navigate to: |
|---|---|
| Profile | Concentrator Profile window |
| Fault | Concentrator Fault window |
To delete a concentrator definition from the LAN Network Manager concentrator table, follow these steps:
An error message is displayed if the definition cannot be deleted.
A concentrator can be registered to one OS/2 agent at a time. By registering a concentrator with an OS/2 agent, the OS/2 agent can follow these steps:
Only a controlling OS/2 agent can register with a concentrator.
To register an OS/2 agent with a concentrator, select Register from the Actions pull-down menu on the Concentrator Configuration window of the concentrator you want to register.
For more information about concentrator registration, refer to Registering with a Concentrator.
To deregister an OS/2 agent from a concentrator, select Deregister from the Actions pull-down of the Concentrator Configuration window of the concentrator you want to deregister.
For more information about concentrator registration, refer to Registering with a Concentrator.
To change the wrap state for the concentrator, follow these steps:
This choice is not available if an error occurred while LAN Network Manager was obtaining the profile.
LAN Network Manager displays a dialog box confirming the change in the wrap status of the concentrator.
Attention: Changing the wrap state of a concentrator can disrupt ring operation or host communication with some devices.
If you change the wrap state and an error condition exists on the segment that prevents the concentrator from running effectively under the new wrap state, the change does not take effect until the error is removed.
The Concentrator Fault window displays error data for the Controlled Access Unit (concentrator). In addition to providing general identifying file information, such as the concentrator identifier (ID) and the concentrator registration status, the window displays error data for both the ring-in and ring-out sides of the concentrator, and for the backup path.
To display fault information for a concentrator, select the concentrator for which you want fault information, then select Fault from either the LAN pull-down menu or the context menu.
You can navigate directly to the following Concentrator windows by
selecting one of these choices from the Navigation pull-down menu on the
Concentrator Fault window:
| Select: | To navigate to: |
|---|---|
| Profile | Concentrator Profile window |
| Configuration | Concentrator Configuration window |
To view configuration information about a specific port module, use the Module Configuration window. This window provides the current operating status of the modules and additional information about the Controlled Access Unit (concentrator) to which the module is attached. The window also indicates whether there is a mismatch between a particular port and its expected adapter address.
To display the Module Configuration window, select the module for which you want configuration information, then select Configuration from either the LAN pull-down menu or the context menu.
To change the operating status of the module, select Enable or Disable from the Actions pull-down menu on the Module Configuration window. See Changing Module Status for more information.
To change the operating status of a module, follow these steps:
The Module Configuration window is displayed.
LAN Network Manager displays a dialog box warning you that the module status is going to be changed. An error message is displayed if the status change is not successful.
Changing module status can disrupt normal network activity.
To view configuration information about a specific port, use the Port Configuration window. In addition to providing the current operating status of the port, this window displays information about the module to which it is attached and about the Controlled Access Unit (concentrator) that controls the module.
To display the Port Configuration window, select the port for which you want configuration information, then select Configuration from either the LAN pull-down menu or the context menu.
To change the operating status of the port, select Enable or Disable from the Actions pull-down menu on the Port Configuration window. For more information, see Changing Port Status.
To change the status of a port, follow these steps:
The Port Configuration window is displayed.
LAN Network Manager displays a dialog box warning you that the port status is going to be changed. An error message is displayed if the status change is not successful.
If the concentrator loses power, this setting is not maintained.
To view profile information for a specific adapter in the Controlled Access Unit (concentrator), use the PI/PO/S Profile window. This window displays the concentrator identifier (ID) and segment number of the selected adapter.
The information that is provided on this window pertains only to the adapter that you selected on the Concentrator submap. For example, if you select the primary-out adapter on the concentrator, the PI/PO/S Profile window displays information only for the primary-out adapter.
To display a profile for the adapters in the concentrator, select a PI, PO, or S icon, then select Profile from either the LAN pull-down menu or the context menu.
Use the Profile window to display information about a specific adapter or bridge port.
The ports in a module are represented in the Concentrator submap by a pair of icons. The diamond-shaped icon to the left of each pair represents the port. If a device is connected to a port, it is represented by another icon directly to the right of the port icon. The shape of the icon to the right indicates the type of device that is connected to the port:
To display a profile window for a device, select the device, then select Profile from either the LAN pull-down menu or the context menu. A Profile window for the station or bridge port is displayed. For more information, see Displaying a Station Profile.
Navigate directly to the Configuration window for the selected adapter or bridge port by selecting Configuration from Navigation pull-down menu on the Profile window.