I have two R-Shakes and one R-Boom oneline now, and all three seem to work OK. However when I was looking at my network with wireshark I see that one of them does not behave like the others. This device which is a Raspberry Shake 1D running on a RPi 3B, station name RF7DC SHZ AM 00 which has IP address 192.168.1.154 (aka rs.local) on my LAN. It sends out a broadcast ARP packet about one per second, every minute of every day, like this:
|335|58.376846|Raspberr_7a:f7:dc|Broadcast|ARP|60|Who has 192.168.1.126? Tell 192.168.1.154|
|340|59.374849|Raspberr_7a:f7:dc|Broadcast|ARP|60|Who has 192.168.1.126? Tell 192.168.1.154|
|344|60.374834|Raspberr_7a:f7:dc|Broadcast|ARP|60|Who has 192.168.1.126? Tell 192.168.1.154|
It is always looking for 192.168.1.126 but never gets a reply, as no such machine exists on my LAN. (Most of my devices use DHCP and it is possible that some time ago before a router reboot, there might have been a machine at that address, but not in the recent past.) I rebooted that Shake today but this ARP behavior continues just as before. Any idea why this is going on? My other R-Shake and R-Boom (aka rs-2.local and rs-3.local) do not do anything like this. They are all running System Version 0.15 which is the latest. Log files from the “chatty / noisy” machine RF7DC are attached below.
RSH.RF7DC.2019-09-28T16_27_36.logs.tar.zip (275.7 KB)
To clarify, there is nothing obviously wrong with this station, it is logging and reporting seismic data as normal. Without looking with wireshark I would suspect nothing. However now that I noticed this strange behavior I am curious because I don’t like unusual and unexplained network behavior.