Obtaining the NETCONF Enabling Configuration and iMaster NCE-Campus's Address Information Through a Registration Query Center

In addition to using DHCP, switches can obtain the NETCONF enabling mode and iMaster NCE-Campus's address information through a registration query center. On the network involving a registration query center shown in Figure 1:

iMaster NCE-Campus needs to set up an HTTP/2 connection with and synchronize information about to-be-managed devices to the registration query center.
A switch first obtains its management IP address from the DHCP server (the egress gateway shown in Figure 1 can also function as a DHCP server). The switch then sets up an HTTP/2 connection with the registration query center, enables NETCONF, and obtains iMaster NCE-Campus's address information.

If this is not the first time the switch registers with iMaster NCE-Campus, the switch preferentially uses the device IP address and iMaster NCE-Campus's URL/IP address and port number recorded in a file. To change the iMaster NCE-Campus's URL/IP address and port number through the registration query center, you need to restore the switch to the factory settings.

Figure 1 Network with a registration query center

Interaction between iMaster NCE-Campus and the registration query center through an HTTP/2 connection

As shown in Figure 2, an administrator imports information about new devices, including the ESNs and device types, into iMaster NCE-Campus. iMaster NCE-Campus then initiates an HTTP request to the registration query center to upload the information. After receiving the request, the registration query center performs bidirectional authentication and sets up an HTTP/2 connection with iMaster NCE-Campus. After the HTTP/2 connection is set up, iMaster NCE-Campus uploads its address information and the new devices' information (including ESNs) to the registration query center.

Figure 2 Interaction between iMaster NCE-Campus and the registration query center through an HTTP/2 connection

Interaction between a switch and the registration query center through an HTTP/2 connection

NETCONF-capable switches are preconfigured with the URL (register.naas.huawei.com) and port number (10020) of the registration query center. In Figure 3, after the switch connects to the network, it initiates an HTTP request to the registration query center. The switch and registration query center then set up an HTTP/2 connection for bidirectional authentication. After the connection is set up, the switch sends a request packet carrying its ESN to the registration query center. After receiving the request packet, the registration query center finds the corresponding ESN in the system, and sends a response packet carrying iMaster NCE-Campus information to the switch. The switch enables NETCONF and obtains iMaster NCE-Campus information based on the response packet, and then registers with iMaster NCE-Campus for authentication.

Figure 3 Interaction between a switch and the registration query center through an HTTP/2 connection