MCM not showing up on my router

I have a netgear R7000 router and a MCM 8TB. I’ve had this setup for years and have always had a reserved IP address for the MCM. Recently I’ve been losing the connection to the MCM.
If I unplug the Ethernet cable the light on my router goes out but the MCM doesn’t throw an error light that it has no connection.
A reboot of the MCM will fix this but that is annoying. Maybe I’m getting the error when the MCM goes to sleep.
Any ideas?


You could refer to the following link: