Thank you for your reply. Wifi is not an option. The goal is to be able to plug the scanner's RJ45 directly into the computer I am using so if one computer goes down I can plug it into the next computer. Simple and sounds doable with a USB Ethernet Adapter for a computer without a factory Ethernet port.
Wifi adds a complication as it could go down as well and then none of the computers
will have radar.
Excuse me for my ignorance on Routers and Ethernet Switches but let me continue:
From the BR24 Radar [OpenCPN Manual.pdf on page 13:
"Choosing an Ethernet switch
If you are going to use a switch you may as well use a Gigabit switch. The scanner has a 100 Mbit interface, but a Gigabit switch will use slightly less power than a 100 MBit switch. You should probably also use one that has a 12V input which can be powered directly from the 12V house battery
(or a DC/DC converter if you have a 24 V house battery
The author uses a 5 port Netgear GS105 which according to Netgear: Both GS105 and GS108 support the latest Energy E cient Ethernet (IEEE 802.3az) standard, which reduces energy consumption
when there is light traffic on an active port or when there is no link or no activity detected. It can further save energy when a short cable (<100m) is used. Energy savings lead directly to cost savings in operation."
What I see is the problem is that the scanner transmits Multicast which when using the dongle it does not recognize as an IP so assigns 169.254.
My question is does the scanner RJ45 go into the Switch and an IP address assigned and then the RJ45 cable run to a computer Ethernet port (dongle in my case) or is there a Router involved that the scanner RJ45 goes into, assigns an IP address and then wired to a switch?
What is the actual hardware
and how is it wired together?
That may solve the problem!