Configuration

In this example, streaming telemetry with OcNOS is demonstrated, using 'gnmic' as the gNMI Client.

To install the gnmic tool for managing network devices using gNMI, refer to the gnmic Installation

Figure 7. Dial-In Streaming Telemetry Topology

Before configuring Dial-In, meet all Prerequisites.

Enable streaming telemetry in a default VRF Virtual Routing and Forwarding on OcNOS:

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OcNOS#configure terminal
OcNOS(config)#feature streaming-telemetry
OcNOS(feature-telemetry-config)#commit
OcNOS(feature-telemetry-config)#exit

Telemetry Subscription Request via gnmic Command and YAML Input

Use the gnmic command with a YAML file input to request telemetry subscriptions with multiple paths.

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gnmic -a <ipaddress:port> -u <UserName> -p <Password> --insecure  --config <path to config file> subscribe

This command establishes a telemetry subscription with the specified paths defined in the YAML file.

Telemetry Subscription Request via gnmic Command with a Single Path Option

Use the gnmic command with a single path option to request a telemetry subscription for a specific data path.

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gnmic -a  <ipaddress:port> -u <UserName> -p <Password> --encoding [json, json_ietf] --insecure --mode STREAM --stream-mode sample --sample-interval sample-interval-value sub --path <path>

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gnmic -a  <ipaddress:port> -u <UserName> -p <Password> --encoding [json, json_ietf] --insecure --mode [POLL, ONCE] sub --path <path>

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gnmic -a <ipaddress:port> -u <UserName> -p <Password> --encoding proto --insecure --mode STREAM --stream-mode sample --sample-interval sample-interval-value sub --path <path> --proto-file IPI_OC.proto

This command creates a telemetry subscription for the specified path with the chosen sample interval and encoding format.

Supported gnmic Options

The following table explains the option fields.

Table 11. gnmic Option Details
Option	Description
--encoding	Specifies the encoding format as either `json`, `proto`, or `json_ietf.` The default encoding format is `json`.
--mode	Sets the mode of operation `(STREAM, POLL, and ONCE).`
--insecure	Allows insecure connections.
--stream-mode	Sets the stream mode (`Sample`).
--sample-interval	Sets the sample interval (`10s`). Note: Interval should be 10s or more.
--config	Specifies the YAML configuration file path (Example: `input_path.yaml`).
--path	Sets the path to subscribe to specific data (Example:`‘ipi:/interfaces/interface[name]/state’`). Note: For multiple paths specify each path with --path option.
--prefix	Defines a common prefix for all specified paths (Example:`‘ipi:/interfaces’`).
--proto-file	Path to Proto file (Example: `IPI_OC.proto`).