Table of Contents 1 TR-069 Configuration 1-1

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1 Table of Contents 1 TR-069 Configuration 1-1 TR-069 Overview 1-1 TR-069 Network Framework 1-1 Basic Functions of TR TR-069 Mechanism 1-3 TR-069 Configuration 1-4 Configuration Guidelines 1-6 i

2 1 TR-069 Configuration TR-069 Overview The TR-069 protocol is initiated and developed by the Digital Subscriber s Line (DSL) Forum. It defines the general framework, message format, management method, and data model for the management and configuration of home network devices in next-generation networks. TR-069 is mainly applied to DSL access networks, which are hard to manage because user devices are located at the customer premise, dispersed, and large in number. TR-069 makes the management easier by using an auto-configuration server (ACS) to perform remote centralized management of customer premise equipment (CPE). TR-069 Network Framework Figure 1-1 illustrates the basic network framework of a TR-069 network. Figure 1-1 Network diagram for TR-069 The basic network elements of TR-069 include: ACS: Auto-configuration server, the management device in the network. CPE: Customer premise equipment, the managed device in the network. DNS server: Domain name system server. TR-069 defines that 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 server, which assigns an IP address to ACSs and CPEs, and uses the options filed in the DHCP packet to provide configuration parameters to the CPE. The H3C device is the CPE and uses TR-069 to communicate with the ACS. Basic Functions of TR-069 Auto connection between ACS and CPE A CPE can connect to an ACS automatically by sending an Inform message. The following conditions may trigger an auto-connection establishment: 1-1

3 A CPE is started 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 will automatically send an Inform message at the configured interval (One hour for example) to establish connections. A CPE is configured to send Inform messages at a specific time. The CPE will automatically send an Inform message at the configured time to establish a connection. The current session is not finished but interrupted abnormally. In this case, if the number of CPE auto-connection retries does not reach the limit, the CPE will automatically establish a connection. An ACS can initiate a Connect Request to a CPE at any time, and can establish a connection with the CPE after passing the CPE authentication. Auto-configuration When a CPE logs in to an ACS, the ACS can automatically apply some configurations to the CPE for it to perform auto configuration. Auto-configurable parameters supported by the device include (but are not confined to) 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 boot file and configuration file management The network administrator can save important files such as the system boot file and configuration file of a CPE to an ACS. If the ACS finds that a file is updated, it will notify the CPE to download the file by sending a request. After the CPE receives the request, it can automatically download the file from the specified file server according to the filename and download address provided in the ACS request. After the CPE downloads the file, it will check the file validity and then report the download result (success or failure) to the ACS. Currently, the device does not support file download using digital signature. Currently, the device supports to download the following types of files: system boot file and configuration file. To backup important data, a CPE can upload the current configuration file to the specified server according to the requirement of an ACS. Currently, the device only supports uploading the vendor configuration file and log file. 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 the current configuration and the configuration changes of each CPE. TR-069 also allows the administrator to define monitor parameters and get the parameters through an ACS, so as to get the CPE status and statistics information. 1-2

4 The status and performance that can be monitored by an ACS include: manufacture name (Manufacturer), ManufacturerOUI, SerialNumber, HardwareVersion, SoftwareVersion, DeviceStatus, UpTime, configuration file, ACS address, ACS username, ACS password, PeriodicInformEnable, PeriodicInformInterval, PeriodicInformTime, CPE address, CPE username, and CPE password. TR-069 Mechanism RPC methods In the TR-069, a series of RPC methods are used for intercommunication between a CPE and an ACS. The primary RPC methods are described as follows: Get: This method is used by an ACS to get the value of one or more parameters of a CPE. Set: This method is used by an ACS to set the value of one or more parameters of a CPE. Inform: This method is used by a CPE to send an Inform message to an ACS whenever the CPE initiates a connection to the ACS, or the CPE s underlying configuration changes, or the CPE periodically sends its local information to the ACS. Download: This method is used by an ACS to require a CPE to download a specified file from the specified URL, ensuring upgrade of CPE hardware and auto download of the vendor configuration file. Upload: This method is used by an ACS to require a CPE to upload a specified file to the specified location. Reboot: This method is used by an ACS to reboot a CPE remotely when the CPE encounters a failure or software upgrade is needed. How TR-069 works The following example illustrates how TR-069 works. The scenario: There are two ACSs, active and standby in an area. The active ACS needs to restart for system upgrade. To ensure a continuous monitoring of the CPE, the main ACS needs to let all CPEs in the area connect to the backup ACS. The whole process is as follows: 1-3

5 Figure 1-2 Example of the TR-069 message interactions CPE ACS (1) Open TCP connection (2) SSL initiation (3) HTTP post (Inform) (4) HTTP response (Inform response) (5) HTTP post (empty) (6) HTTP response (GetParameterValues request) (7) HTTP post (GetParameterValues response) (8) HTTP response (SetParameterValues request) (9) HTTP post (SetParameterValues response) (10) HTTP response (empty) (11) Close connection 2) Establish a TCP connection 3) SSL initiation, and establish a security connection 4) The CPE sends an Inform request message to initiate a TR-069 connection. The Inform message carries the reason for sending this message in the Eventcode field. In this example, the reason is 6 CONNECTION REQUEST, indicating that the ACS requires the CPE to establish a connection. 5) If the CPE passes the authentication of the ACS, the ACS will return an Inform response, and the connection is established. 6) Receiving the Inform response, the CPE sends an empty message, if it has no other requests. The CPE does this in order to comply with the request/reply interaction model of HTTP, in which TR-069 messages are conveyed. 7) The ACS queries the value of the ACS URL set on the CPE. 8) The CPE replies the ACS with the obtained value of the ACS URL. 9) The ACS finds that its local URL value is the same as the value of the ACS URL on the CPE. Therefore, the ACS sends a Set request to the CPE to modify the ACS URL value of the CPE to the URL of the backup ACS. 10) The setting succeeds and the CPE sends a response. 11) The ACS sends an empty message to notify the CPE that it has no other requests. 12) The CPE closes the connection. After the above steps, the CPE will initiate a connection to the backup ACS. TR-069 Configuration The TR-069 parameters of CPE can be configured automatically through ACS remote management, and also can be configured manually through Web, which is described in detail in the following: 1-4

6 Select Device Management > TR-069 from the navigation tree to enter the page, as shown in Figure 1-3. Figure 1-3 TR-069 Perform the tasks in Table 1-1 to configure TR-069. Table 1-1 TR-069 parameter configuration task list TR-069 ACS Task URL Username Password Remarks Enable or disable TR-069. TR-069 configurations can take effect only after you enable TR-069. Configure the URL used by a CPE to initiate a connection to the ACS. Configure the username used by a CPE to initiate a connection to the ACS. Configure the password used by a CPE to initiate a connection to the ACS. You can specify a username without a password that is used in the authentication. If so, the configuration on the ACS and that on the CPE must be the same. CPE Username Configure the username used by the CPE to authenticate the connection sent from the ACS Password Sending Inform Interval Account Maintenance Configure the password used by the CPE to authenticate the connection sent from the ACS. You can specify a username without a password that is used in the authentication. If so, the configuration on the ACS and that on the CPE must be the same. Enable or disable CPE s periodical sending of Inform messages Configure the interval between sending the Inform messages Enable or disable the CPE to inform the ACS to change the password of the account TelecomAdmin. Support for the configuration of Account Maintenance depends on the device model. 1-5

7 Task CPE Interface Remarks Set the CPE connection interface. The CPE sends inform packets carrying the IP address of this interface to make the ACS establish a connection with the CPE using this IP address. Configuration Guidelines When configuring TR-069, note that: TR-069 configuration through ACS is of higher priority than that through Web. You cannot use a configuration mode to modify parameters configured through a configuration mode with a higher priority. 1-6