Be sure it's NOT an ISP or IPv6 configuration issue first as it may not be a FW issue.
Has a factory reset and setup from scratch been performed since last FW update?
What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?
@RedBatman89 wrote:
So I still have my rbk23 and I have to say that since frimware 2.5.1.16, there have been some IPV6 issues again. The couple of previous firmwares seem to have fixed it before but now on some machines it will say IPV6 Not availiable, while others it will be okay. The Windows computers in the houshold seem to be the most affected. If one machine has IPV6 availiable but the other one doesn't then if I restart on of them the IPV6 will be availbe for the one that didn't have it prevosily. Oddly even though it says unavailible the IPV6 adressses still appear. Now my Linux machines seem unaffected by this, as well as any android, iphone, or game consoles devices so far. I upgraded the firmware to 2.6.1.36 to see if that fixed it but after a week it happened again. At first I tought it was Comcast since they are my ISP, but given the oddity of this issue I think its more of a firmware thing. Please fix this Netgear.
My Setup | ISP SparkLight | Internet Cable 1000↓/50↑ CAX30 Mode Mode | Wifi Router XR500 and RBK863 Router mode | Switches NG GS105/8, GS308v3, GS110MX and XS505M | Additional NG HW: C7800/CAX3/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: MK63, R7000, R7800, R7960P, R8000, R8500, RAXE500, RAX120v2, RAX50v2, XR450/500/700/1000, EX7500/EX7700
