Setting Up iPv6 on Orbi50

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Piquard wrote:

I am with a ISP who provide a Static IP. They are moving us over tp IPv6 and have provided me with the IPv6 settings. I have the WAN IP6 Address, WAN IP6 Gateway , and the LAN IP6 Network address.
How do I go about setting up my Orbi RBR 50 router?
I am using a iMac with OS version 10.13.6. I have logged into the Orbi settings and enabled the iPv6 and selected the Fixed option, and entered all of the appropriate settings.
On my iMac, when I go into my Network Preferences it shows that it has registered the iPv 6 settings. BUT when I run a Traceroute using a iPv6 address, like for Google or Cloudflare it says the host is unknown or do a ping it is unable to complete it. It says "cannot resolve the address , unknown host. 

When I go to iPv6 test site it does not recognise my iPv6 settings.
Does anyone have any suggestions as to what I have done wrong and how to fix it?? I have rebooted the computer.
Assistance would be appreciated.

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As FURRYe38 mentioned, there can be issues on the device which prevent IPv6 operation.  I had a similar result from the test-ipv6.com web site, and then realized that although my Orbi has IPv6 configured, both of my Windows machines were "IPv4 Only".  My smartphone passed easily (because I had not tinkered with it).  I know nothing about iMac network settings, but it might be worth taking a few minutes to try some other devices.

I would also test IPv6 from the Orbi router itself.  i.e. telnet into the router, log in, and enter a command such as

ping 2001:4860:4860::8888

(IPv6 for Google DNS) or

traceroute 2001:4860:4860::8888

If these fail from the Orbi router, than the iMac settings are probably fine.

When I reread the original post, I do not see anything about IPv6 DNS servers.  Ping and traceroute do not need DNS, but "Cannot resolve host" might to be related to a DNS issue?  (Or not.  Getting up to speed on IPv6 appears to be more difficult than I had hoped it would be.)