Network switch configuration with Xi6-T

[dostrow]

So I just changed over from ATT Uverse to Xfi for my internet and TV services.  I have a Netgear JGS516PE 16 port (8 POE) Smart managed switch to allow for hardwire connectivity from my security system and Ubiquiti AP's.  It was simple plug n play when I connected to the UVerse gateway, but it doesn't appear to be the same for connectivity to the Xi6.

Everything was working fine when the switch was connected to the Uverse gateway, however, when I connected it to the Xi6, I keep getting sporadic connectivity for the network switch attached devices.  

I did a factory reset on the network switch thinking that may resolve the issue with no luck.  Does anyone have any insight/advice as to connecting a network switch to the Xi6-T gateway?  

[CCAndrew]

FYI, an Xi6 is an X1 cable box and an XB6 is the gateway

[dostrow]

My apologies...got my boxes mixed up.  I have the CGM4331COM gateway.