DIAL IN, The collector has full control over what data to collect and how often, making this a highly centralized and efficient option for managing metrics
Dial-In Mode
In a dial-in mode, a collector dials in to the router, and subscribes dynamically to one or more sensor paths specified in a subscription. The router is open for connections from the collector. This mode is useful to establish a single channel of communication with the router. Because the collector establishes the session, there is no need to create destinations in the configuration. Additionally, the protocol (gRPC) used to establish a session provides advanced security capabilities to authenticate and encrypt the session. If the connection between the router and the collector is lost, the session is cancelled. The collector must reconnect to the router to restart streaming data. Only gRPC supports dial-in session.
To explore the dial-in mode, and to create a dial-in session, see Establish a Model-Driven Telemetry Session from a Collector to a Router.
https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/710x/telemetry/configuration/guide/b-telemetry-cg-asr9000-710x/scale-up-your-network-monitoring-strategy-using-telemetry.html#id_117897:~:text=Use%20gRPC%20dial%2Din%20mode
Use gRPC dial-in mode if you are already using gRPCin your network and you want your sessions to be dynamic without having the data streamed to fixed destinations. This mode is convenient if you prefer a centralized way configuring your network and requesting operational data.
Both ChatGPT and Gemini are saying C.
Dial-out: In this approach, the telemetry senders (data sources) initiate connections to the collector (receiver). This allows the collector to centrally define the desired metrics and configuration, which the senders adhere to when transmitting data. The collector acts as the control point for telemetry data collection.
Dial-in: This is the opposite of dial-out, where collectors wait for data sources to connect and send data. While configuration might exist on the collector, it wouldn't necessarily control what data is sent.
Which telemetry transport option allows the desired configuration of metrics to be centrally maintained on the collector?
A. poll
B. pull
C. dial-out
D. dial-in
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