H3C Technologies H3C MSR 50 - Manual (Page 90)

• A CPE starts up. A CPE can find the corresponding ACS according to the acquired URL, and
automatically initiates a connection to the ACS.
• A CPE is configured to send Inform messages periodically. The CPE automatically sends an Inform
message at the configured interval to establish connections.
• A CPE is configured to send an Inform message at a specific time. The CPE automatically sends an
Inform message at the configured time to establish a connection.
• The current session is interrupted incorrectly. In this case, if the number of CPE autoconnection
retries does not reach the limit, the CPE automatically establishes a connection.
An ACS can initiate a connection request to a CPE at any time, and can establish a connection with the
CPE after passing CPE authentication.
Autoconfiguration
When a CPE logs in to an ACS, the ACS can automatically apply some configurations to the CPE for it
to perform auto configuration. Autoconfiguration parameters supported by the device include the
following:
• Configuration file (ConfigFile)
• ACS address (URL)
• ACS username (Username)
• ACS password (Password)
• PeriodicInformEnable
• PeriodicInformInterval
• PeriodicInformTime
• CPE username (ConnectionRequestUsername)
• CPE password (ConnectionRequestPassword)
CPE system software image file and configuration file management
The network administrator can save CPE system software image files and configuration files on the ACS
and configure the ACS to automatically request the CPE to download any update made to these files.
After the CPE receives an update request, it automatically downloads the updated file from the file server
according to the filename and server address in the ACS request. After the CPE downloads the file, it
checks the file validity and reports the download result (success or failure) to the ACS.
To back up important data, a CPE can upload the current configuration file to the specified server
according to the requirement of an ACS. The device supports uploading only the vendor configuration
file or log file.
NOTE:
The device can download only system software images and configuration files from the ACS, and does not
support digital signatures.
CPE status and performance monitoring
An ACS can monitor the parameters of a CPE connected to it. Different CPEs have different performances
and functionalities. Therefore the ACS must be able to identify each type of CPE and monitor each CPE's
current configuration and configuration changes. CWMP also allows the administrator to define monitor
parameters and get the parameter values through an ACS, so as to get the CPE status and statistics
information.
The status and performance that can be monitored by an ACS include:
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