Example 01: connect

Dials a P4Runtime target, wins the primary election, and prints a summary of the installed pipeline (if any).

Run

Use Go 1.26 or newer and run from the repository root with a reachable P4Runtime target. To start local BMv2, follow the script guide.

go run ./examples/01_connect --addr 127.0.0.1:9559 --device-id 1 --election 1

What to expect

On a fresh BMv2 instance with no pipeline loaded, output looks like:

connected: device_id=1 election_id=0:1 state=primary
no pipeline installed — run example 02 to push one

Once a pipeline is installed (see example 02) the second line lists how many tables and actions P4Info exposed.

The example waits until Ctrl+C in either case, then prints shutting down and closes the connection. It recognizes both an empty pipeline response and the pipeline-missing error returned by a fresh BMv2 target.