Basic Functions Of Cwmp; Automatic Configuration File Deployment; Cpe System File Management - H3C S3100V2-52TP Configuration Manual

NOTE:
In a real network, the DHCP server, ACS, and DNS server can locate on the same server as three logical
components.
As shown in the figure, a CWMP network includes the following roles:
• CPE—The managed switch in the network. A CPE reports its information to the ACS and obtains
configurations from the ACS.
ACS—Auto-configuration server. An ACS delivers configurations to CPEs and provides
•
management services to CPEs. In this document, ACS refers to the server installed with the H3C iMC
branch intelligent management system (iMC BIMS).
DNS server—Domain name system server. An ACS and a CPE use URLs to identify and access each
•
other. DNS is used to resolve the URLs.
DHCP server—Dynamic Host Configuration Protocol (DHCP) server, which assigns IP addresses to
•
CPEs, and uses the options filed in the DHCP packet to provide configuration parameters (such as
URL) to the CPEs.

Basic functions of CWMP

Automatic configuration file deployment

The network administrator can create different configuration files on the ACS for access switches
according to their service functions to realize fast configuration. After a connection is established
between the ACS and a CPE, the ACS determines the type of the CPE and delivers the corresponding
configuration file to the CPE. In this way, CPEs of the same type obtain the same service configurations.
The ACS divides CPEs by their switch models or serial IDs.
A configuration file delivered by the ACS can be either the startup configuration or the running
configuration on the CPE.
Startup configuration: The configuration file delivered by the ACS overwrites the default
•
configuration file on the CPE. After the CPE reboots, it runs the new configuration file.
Running configuration. The configuration file delivered by the ACS is written to the running
•
configuration file on the CPE, and the new configurations take effect immediately. You need to save
the new configurations to make them survive a switch reboot.

CPE system file management

The network administrator can save important files such as the application file and configuration file of
a CPE to an ACS. If the ACS finds that a file is updated, it notifies the CPE to download the file by sending
a request. After the CPE receives the request, it automatically downloads the file from the specified file
server according to the filename and downloading address provided in the ACS request. After the CPE
downloads the file, it checks the file validity and then report the download result (success or failure) to the
ACS.
CPEs can download the following types of files from the ACS: application file and configuration file.
To backup important data, a CPE can upload the current configuration file and log files to the specified
server according to the requirement of an ACS.
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