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Troubleshooting Question

arp request for a .255 address - how can this be ?

Salad-Dodger asked
Last Modified: 2020-07-27
I'm not a networking expert by any stretch but I know a little and this seems odd.  I am pulling telemetry data over a slow (19,200 at best) Ethernet encapsulated serial radio so the rules are a little different from a Wifi or Hardwired link but this still seems wrong and is a lot of the problem. I have excessive traffic on the link and when I look at it on wireshark I see the following capture
I thought .255 was not valid as an address, why would there ever be an ARP request for it? There is lots of ARP traffic I need to block and I'm working towards that, but this struck me as being completely wrong. Is it?
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