ping none

The ping RPC sends a P2P ping message to all connected nodes to measure ping time. Results are provided by the `getpeerinfo` RPC pingtime and pingwait fields as decimal seconds. The P2P `ping` message is handled in a queue with all other commands, so it measures processing backlog, not just network ping.

bitcoin-cli ping

*bitcoin-cli help ping

ping

Requests that a ping be sent to all other nodes, to measure ping time.
Results provided in getpeerinfo, pingtime and pingwait fields are decimal seconds.
Ping command is handled in queue with all other commands, so it measures processing backlog, not just network ping.

Examples:
> bitcoin-cli ping 
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "ping", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/