Configuration information subscription method and apparatus

A configuration information subscription method, comprising:

• generating, by a server, a subscription notification message, wherein the subscription notification message comprises first configuration information and second configuration information, and the second configuration information is associated with the first configuration information;
• and
• sending, by the server, the subscription notification message to a client;
• wherein before the generating, by a server, a subscription notification message, the method further comprises:
• obtaining, by the server, the first configuration information and the second configuration information, wherein the first configuration information comprises configuration information of an instance of a first node, the second configuration information comprises configuration information of an instance of a second node associated with the first node, the configuration information of the instance of the second node associated with the first node is configuration information obtained after the instance of the second node satisfies a first constraint condition and a configuration of an instance of the second node changes, and that a configuration of an instance of the second node changes comprises:
• an attribute value of the instance of the second node changes, an instance of the second node is added, or an instance of the second node is deleted.

A configuration information subscription apparatus, comprising:

• a processor configured to obtain a subscription request message, wherein the subscription request message comprises first indication information and second indication information, the first indication information indicates subscribed first configuration information, and the second indication information indicates subscribed second configuration information associated with the first configuration information;
• and
• a transceiver configured to send the subscription request message to a server;
• wherein if a YANG model of the first node describes that the second node is of a leafref type, the subscription request message comprises a leaf-ref-sub field, to subscribe to the configuration information of the instance of the second node associated with the first node, wherein
• if the subscription request message further comprises target field information of the second configuration information, the subscription notification message comprises a target field in the second configuration information;
• or
• if the subscription request message is for indicating to subscribe to second configuration information of a target node instance, the subscription notification message comprises the second configuration information of the target node instance.

A configuration information subscription apparatus, comprising:

• a processor configured to generate a subscription notification message, wherein the subscription notification message comprises first configuration information and second configuration information, and the second configuration information is associated with the first configuration information;
• and
• a transceiver configured to send the subscription notification message to a client,
• wherein the processor is further configured to obtain the first configuration information and the second configuration information, wherein the first configuration information comprises configuration information of an instance of a first node, the second configuration information comprises configuration information of an instance of a second node associated with the first node, the configuration information of the instance of the second node associated with the first node is configuration information obtained after the instance of the second node satisfies a first constraint condition and a configuration of an instance of the second node changes, and that a configuration of an instance of the second node changes comprises:
• an attribute value of the instance of the second node changes, an instance of the second node is added, or an instance of the second node is deleted.