Notification topics are switch resource URIs

When you subscribe to notifications, you subscribe to notifications about specific topics. A topic is the URI of a specific switch resource. That URI can contain a query string that specifies particular attributes of that resource.

For example, specifying the following URI as a topic results in notifications being sent when the administrative state or link state of any interface changes, but not when some other attribute of an interface changes:

/rest/v1/system/interfaces?attributes=admin_state,link_state

The AOS-CX REST API Reference lists all the switch resources. You can use the GET method of the resource in the AOS-CX REST API Reference to determine the URI for that switch resource, including the query string to specify an attribute or list of attributes.