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Forum Discussion
FirstCup
Nov 06, 2025Guide
IPV6 no connection RBR 850
I called my ISP and they confirmed I have an ipv6 connection available from them on a fiberoptic connection to my Orbi RBR 850 which will not transmit ipv6 to my network and when I run an online ipv6...
FURRYe38
Nov 22, 2025Guru - Experienced User
Just checking, are you using detected ISP IPv6 DNS or custom IPv6 DNS?
How is the RBR configured for IPv6, which mode are you using from the IPv6 drop down menu?
KMDonlon wrote:Yes, FURRYe38 is correct. I have tried v7.2.7.15 & v7.2.8.2. IPv6 drops on both versions.
Worked just fine with no dropping with prior firmware versions. I am currently running V7.2.6.31 with no issue. Also had no issues with several previous versions prior.
Issue began starting with v7.2.7.15. I have exhausted all the mentioned troubleshooting steps in previous threads. Something was introduced or excluded with v7.2.7.15 and
v7.2.8.2 for the dropping to begin.
My ISP is Cox. I am on a fiber connection from a Nokia ONT
KMDonlon
Nov 22, 2025Virtuoso
I've tried both, detected and custom...no change.
I have always used DHCP, it is the only one that works. I have also tried other options in the drop down with no success. Cox calls for DHCP to be selected to pull IPv6. Again, not a single drop using firmware prior to .15. It is the firmware causing the dropped IPv6 issue 100% , I have tried almost everything to resolve in the past with no luck.