Scenario: Recovery of a console requiring a new console type setting

 

Sometimes you might have to change the console type to recover from a console error. An example of this might be the loss of your network during normal operations.

The console type could be changed using one of the following methods:

Only the console service functions (65+21) method will automatically take down the old connection and activate all the resources for the new choice. The other methods might require manual steps to activate the appropriate resources for the new console. These changes also require that the associated resources be available in a state where they can be used. For example, assume that you are using Operations Console LAN and the network fails, that the console was in use by your logical partition, and that you do not have an asynchronous communications card on the IOP tagged for the console. You have to either move a card or change the IOP tagging to allow a directly attached console to work. If the change is not required immediately, you can also wait for the change to take effect during the next IPL, in which case a newly tagged IOP allows the directly attached console to connect. In this example, however, we are attempting to change the console's connectivity and use another device right now. The recommended method for immediate change is the console service functions (65+21) method. After this has been successfully performed, the user must sign on again. Because this scenario is from LAN to the directly attached console, the new console cannot get the special sign-on window or the Console Information Status window. It is the only valid console after the console type change. When the network problem is fixed, the LAN-connected devices go directly to the Console Information Status window and cannot take control as the console without changing the console type back to LAN. Takeover is not available when a device is directly connected as the console because only one connection of this type is allowed by the system.

Another consideration for choosing the method to change the console mode will be the availability of another workstation. If you are installing using the console then the only method available to you is the console service functions (65+21).

 

Parent topic:

Scenarios: Takeover and recovery