Could you check your Starlink DHCP settings? After the cable is plugged into RUT955 WAN port the router does make attempts to request for an IP address, but does not receive any reply:
Thu May 18 13:45:49 2023 daemon.notice netifd: wan (17436): udhcpc: broadcasting discover
Thu May 18 13:45:52 2023 daemon.notice netifd: wan (17436): udhcpc: broadcasting discover
Thu May 18 13:45:55 2023 daemon.notice netifd: wan (17436): udhcpc: broadcasting discover
It could be that, if you have connected Starlink to your PC first, its WAN IP was assigned to your computer's network interface, thus is now associated with its MAC address.
There are a couple alternatives:
- Wait until the lease expires in Starlink;
- Login to RUT955 WebUI, navigate to Network -> Interfaces -> General, edit wan interface settings, switch to Advanced settings tab and enter your computer network interface's MAC in Override MAC address option field.