Configuration Guide Configuring CWMP
single-instance object node is an object node for which there is only one instance, whereas a multi-instance object node is an
object node for which there are multiple instances.
DM nodes can also be classified into readable nodes and readable-and-writable nodes. A readable node is a node whose
parameter values can be read but cannot be modified, and a readable-and-writable node is a node whose parameter values
can be both read and modified.
A data model node has two attributes. One attribute relates to a notification function; that is, whether to inform the ACS of
changes (other than changes caused by CWMP) to parameter values of the data model. The other attribute is an identifier
indicating that the parameters of the data model node can be written using other management modes (than the ACS); that is,
whether the values of the parameters can be modified using other management modes such as Telnet. The ACS can modify
the attributes of the data models using RPC methods.
CWMP manages the data models using corresponding RPC methods.
 Event Management
When some events concerned by the ACS occur on the CPE, the CPE will inform the ACS of these events. The ACS
monitors these events to monitor the working status of the CPE. The CWMP events are just like Trap messages of SNMP or
product logs. Using RPC methods, to the ACS filters out the unconcerned types of events. CWMP events are classified into
two types: single or (not cumulative) events and multiple (cumulative) events. A single event means that there is no
quantitative change to the same event upon re-occurrence of the event, with the old discarded and the newest kept. A
multiple event means that the old are not discarded and the newest event is kept as a complete event when an event
re-occurs for multiple times later; that is, the number of this event is incremented by 1.
All events that occur on the CPE are notified to the ACS using the INFORM method.
Features
The ACS controls the upgrade of the firmware of a CPE using the Download method.
Upgrading the
Configuration Files
The ACS controls the upgrade of the configuration files of a CPE using the Download method.
Uploading the
Configuration Files
The ACS controls the upload of the configuration files of a CPE using the Upload method.
Backing up and
Restoring a CPE
When a CPE breaks away from the management center, this feature can remotely restore the CPE to
the previous status.
9.3.1 Upgrading the Firmware
Upgrading the Firmware means the firmware of a network element (NE) can be upgraded, so as to implement device
version upgrade or replacement.
Working Principle
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