I’ve restarted the OS with a static IP. I now see the OS pinging the router every 54s.
When I was logging traffic before, there were 0 pings, just DHCP request bursts.
Jun 2 13:35:04 Rotary kernel: [LAN_Local-30-A]IN=eth1 OUT= MAC=dc:9f:db:28:40:fc:00:1e:c0:d7:2b:bd:08:00 SRC=192.168.1.80 DST=192.168.1.1 LEN=84 TOS=0x00
PREC=0x00 TTL=64 ID=0 DF PROTO=ICMP TYPE=8 CODE=0 ID=1360 SEQ=1
Jun 2 13:35:58 Rotary kernel: [LAN_Local-30-A]IN=eth1 OUT= MAC=dc:9f:db:28:40:fc:00:1e:c0:d7:2b:bd:08:00 SRC=192.168.1.80 DST=192.168.1.1 LEN=84 TOS=0x00
PREC=0x00 TTL=64 ID=0 DF PROTO=ICMP TYPE=8 CODE=0 ID=1360 SEQ=1
Jun 2 13:36:52 Rotary kernel: [LAN_Local-30-A]IN=eth1 OUT= MAC=dc:9f:db:28:40:fc:00:1e:c0:d7:2b:bd:08:00 SRC=192.168.1.80 DST=192.168.1.1 LEN=84 TOS=0x00
PREC=0x00 TTL=64 ID=0 DF PROTO=ICMP TYPE=8 CODE=0 ID=1360 SEQ=1
Jun 2 13:37:46 Rotary kernel: [LAN_Local-30-A]IN=eth1 OUT= MAC=dc:9f:db:28:40:fc:00:1e:c0:d7:2b:bd:08:00 SRC=192.168.1.80 DST=192.168.1.1 LEN=84 TOS=0x00
PREC=0x00 TTL=64 ID=0 DF PROTO=ICMP TYPE=8 CODE=0 ID=1360 SEQ=1
Jun 2 13:38:40 Rotary kernel: [LAN_Local-30-A]IN=eth1 OUT= MAC=dc:9f:db:28:40:fc:00:1e:c0:d7:2b:bd:08:00 SRC=192.168.1.80 DST=192.168.1.1 LEN=84 TOS=0x00
PREC=0x00 TTL=64 ID=0 DF PROTO=ICMP TYPE=8 CODE=0 ID=1360 SEQ=1