My ARRIS BGW210-700 is automatically changing the IPV6 MTU causing General Discards. This prevents me from Remote Desktop Connection. Previously a factory reset has corrected this. The modem, after a factory reset,
Install and Operations Guide
BGW210 - Change WiFi Password - TOAST.net
Finally found a good way to rack my AT&T BGW210 : r/homelab
AT&T Internet Wi-Fi® Gateway replacement Self-installation Guide | ATT162550933-2