IBM ATM OC-3c manual Both Devices Must be AAL5 Compliant, Is Ilmi Turned On?, Turn Ilmi On

Both Devices Must be AAL5 Compliant

The ATM Module is compatible with AAL5 ATM devices. If the ATM Switch connected to the ATM Module does not support AAL5, you will not be able to get the two devices to communicate. Re-configure your network to ensure that the ATM devices are compatible.

Is ILMI Turned On?

Some devices enable you to turn the Interim Local Management Interface (ILMI) on and off. ILMI on the ATM Module is set to ON and cannot be configured through the local management screens.

Check the user guides that accompany your ATM Switch, to see if you can configure ILMI, and check to see if it is turned on.

Is ILMI turned on at the ATM Switch?

Yes — go to Step 15.

No — go to Step 14.

Turn ILMI On

Turn ILMI on at the ATM Switch. Refer to the user guide that accompanies your ATM Switch.

Access the ATM Module Configuration Screen

From the Main Menu select the ATM CONFIGURATION option. An example of the ATM Module Configuration screen is shown in Figure D-6.

Identifying the Problem D-9

Figure D-6ATM Module Configuration Screen

Is Signalling Compatible?

Signalling must be the same on both devices, and must be either 3.0 or 3.1. The default on the ATM Module is 3.1.

Is the Signalling compatible?

Yes — go to 18.

No — go to 17.

Make Signalling Compatible

Ensure that the Signalling mode is the same on the ATM Module and the ATM Switch.