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Cisco Broadband Access Center 3.8 Administrator Guide
OL-27172-01
Chapter 12 Configuring CWMP Service
Connection Request Service
You can configure data discovery at the RDU. The RDU forwards discovery policy instructions and the
values of parameters, discovered for each device during the previous discovery process, to the
appropriate DPEs. During interactions with the device, the DPE consults the discovery policy
instructions specific to the device to determine what parameters need to be discovered.
After parameter values are discovered, existing device parameters are compared with those already
stored for the device. If the values have changed or are being obtained for the first time, this data is
updated at the RDU. If the RDU is not available to receive the update, the newly discovered data is
dropped, and the entire process of data discovery is initiated the next time the device connects with the
DPE.
Discovered parameters are stored on device records and you can view them by using the administrator
user interface or obtain them through the API
IPDevice.getDetails() call. IPDevice-getDetails()
API also retrieves the device data along with the device property hierarchy. To view discovered
parameters using the user interface, access the Manage Devices page under the Devices tab on the
primary navigation bar.
Locate the device by using the search options, and click the View Details icon ( ) corresponding to the
device. The Device Details page appears, displaying details of the discovered parameters for the device.
Multi-instance object support is available in data discovery for preregistered and unknown devices. For
more information on multi-instance object support, see Multi-Instance Object Support, page 4-5.
The following sections describe:
• Configuring Data Discovery, page 12-12
• Troubleshooting Data Discovery, page 12-13
• Automatic IMEI Update, page 12-15
Configuring Data Discovery
Data discovery policy is configured using the RDU and includes parameters checked:
• On every device contact.
• Only upon a firmware upgrade.
While the discovery of data process executes every time a device establishes contact with the DPE, you
can configure validation of certain parameters to occur only if the device has reported a new firmware
version. This check eliminates the need to validate parameters whose values change only with a firmware
upgrade.
For example, the device model name does not change without a firmware upgrade; thus, you do not need
to check this parameter on the device unless the firmware has been upgraded.
Cisco BAC ships with a default configuration for data discovery. You can augment this default
configuration in two ways:
• Add parameters to a custom list.
• Change the default list. This option, however, is not recommended.
Configuring Parameters Checked on Every Contact
You can configure the default list of parameters discovered everytime the device connects with the DPE
by using the
ServerDefaultsKeys.CWMP_DISCOVER_PARAMETERS property. You can add more parameters
to the default list by providing a comma-separated list of parameters as a value to the
IPDeviceKeys.CWMP_CUSTOM_DISCOVER_PARAMETERS property.
The default list includes: