# Blue Robotics Ping360 Discovery Protocol (Ethernet Only) Discovery protocol is used to find the DVL on an Ethernet network if you don’t know or can’t remember its IP address and/or the IP address you set for the host. A Discovery Request is sent by the host computer to the DVL as an ASCII-encoded broadcast UDP packet to IP address 255.255.255.255 using port 30303. Any devices using this protocol will respond with a Discovery Response message. The body of the Discovery Request packet contains the following text (without the quotation marks): "Discovery" Example Discovery Request: Discovery The Discovery Response message is sent as an ASCII-encoded unicast UDP packet from the DVL to the host computer in response to a Discovery Request. The message is defined as follows: "SONAR DVL" + \\ + "Cerulean Sonar" + \\ + "MAC Address:- " + \ + \\ + "IP Address:- " + \ + \\ "Port:- " + \ + \\ Example reply (using C/C++ string escape character syntax): SONAR DVL\r\nCerulean Sonar\r\n (no line break) MAC Address:-00-12-A4-56-FB-01\r\n (no line break) IP Address:-192.168.2.3\r\n (no line break) Port:-50000 --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ceruleansonar.com/c/dvl-75/communicating-with-the-dvl/blue-robotics-ping360-discovery-protocol-ethernet-only.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.