M4300-16X (XSM4316PA) and ORBI RBK854 CONFIGURATION

Hi,

The auto fill menu for the model numbers on this post doesn't have my models, so below is my equipment:

Modem - Nighthawk CM2000 Multi-gig

Router with 3 Satelites over ethernet backhaul from Router - ORBI RBK854 - firmware V4.6.3.16_2.0.51 (latest I believe)

Switch - M4300-16X (XSM4316PA) connected to Orbi Router ethernet port (firmware 12.0.13.8, there is a notice on the netgear page to use this older firmware due to issues with 12.0.15.4).

I have the above equipment with the Orbi Router in Router Mode and the switch is connected out of the box without any changes to the configuration.  I have no experience configuring switches.  Everything on my system including Control4 devices, wired Ring Doorbells etc has worked plug and play and I've had no issues.  However, I have a "Liftmaster 828LM" internet gateway (to control the garage doors) plugged into my switch and the port won't activate.  It just stays dark.  If i plug the gateway into any of the ethernet ports on any of my satelites it works immediately.  My understanding is the orbi router is assigning ip address etc, so I don't know why it will work with the same ethernet cable on the satelites but not plugged into my switch.  I'm hoping someone can tell me any settings I need to change on my switch that might be preventing it from working.  I did speak to support for Liftmaster and googled and checked the manual.  The tech support said it must be my switch configuration.  The manual has a blurb that states:

"The Internet Gateway uses User Datagram Protocol (UDP) port 80 for inbound and outbound data
messages. Transmission Control Protocol (TCP) port 2165 is used for firmware updates. If a firewall
or network security appliance is on the network (e.g. SonicWALL®), the User Datagram Protocol (UDP)
Timeout setting needs to be set to 180 seconds or greater. "

The only reference to a UDP setting I can find in the switch is something called "UDP RELAY".

Any guidance is appreciated, I would like to keep the Liftmaster gateway device in the closet with my switch on UPS power.

Also, the multi-gig light blinks constantly on my modem, not sure if this is okay or if there are settings I need to address in my router or the swtich.  All ethernet cabling is certified CAT7.

Best Regards,

Matt