Forum Discussion
Does the NOK 5G21 Gateway have a bug in the LAN connections?
See this for an intro: https://community.t-mobile.com/tv-home-internet-7/intermittent-service-t-mobile-5g-43972 I have reason to suspect a problem or bug when a device is connected to a LAN port...
The OP asked about the Nokia, so my reply was about that. Sorry to hear that the Arcadyan has that problem. I was going to see about getting one. If any other Arcadyan owners are experiencing this problem, it would be good to get a thread going about that gateway. Perhaps you could post your experience, Unix_User, under a new thread with Arcadyan in the title. I also have an ATV, and it streams 4K videos perfectly via the ethernet (into a switch, then to the gateway via ethernet cable).
The problem you describe can also be caused if your ATV had a static IP address that you were using with your previous router. The T-Mo gateway uses a 192.168.12 subnet that none of my previous gateways used (cable or DSL). So, for example, if your ATV had a statice address in a 192.168.1 or a 10.0.0 subnet, then the gateway would never see the ATV. I've read, but not experienced, that some ATVs had trouble getting a dynamic IP address and needed to have a static address set for a subnet used by the router. I only mention these latter two causes to suggest that it may be something with a setting in your ATV, rather than a bug in the gateway. Just something to check.
After doing several tests, I can confirm wired devices connected to a KVD21 5G Gateway must be shut down and rebooted to renew the lease on those devices. Rebooting the gateway helps, but doesn't cure a wired device not being able to reach the internet without a power cycle of each device. I have several security cameras, computers, and two Apple TVs. Too get all of them to play nice on the KVD21 via ethernet, I had to shut them all down and then power them back up. If you have the same problem, here's a fix that works for me. Make your (wired) connections, boot the gateway, then boot your wired devices. If the gateway loses its connection to the internet, it's safe to reboot the gateway without rebooting each wired device. If you change any device from wifi to wired, or the reverse, it must be power cycled to get a new IP lease.
