Mac Devices Connection Issues

[sgmstr]

R6400V2 with Firmware V1.0.4.122_10.0.95.

Mac devices not connecting to Internet (only connect to Wifi Router).  Non-Mac devices connect to Internet awith no problem.  It happens randomly and re-starting the router gets you connected to Internet.

Did Wireless Diagnostics on one of my Mac and it is telling me DNS Resolution Failure.  Added a few open source DNS with no luck and since non-Mac devices connects just fine, I'm thinking it has nothing to do with DNS Resolution, but some settings in the router is causing issues with Mac devices.

It could be the firmware issue and maybe downgrading to the previous version may help solve the proglem.

Any help is greatly appreciated.

[plemans]

Do you have IPv6 enabled? 

What modem/gateway is the router connected to? 

Did you try downgrading? 

or even a factory reset/reinstall?

[sgmstr]

IPv6 enabled.

Arris Surfboard SB6190 Modem

Trying to avoid downgrading as it could cause issues (leaving as a last resort)

Performed factory reset.

[sgmstr]

I had IPv6 disabled and was having issues.  Still having issues with IPV6 enabled.  FYI

[plemans]

Did you try a factory reset on the router? 

If so, and you've tried ipv6, then downgrade might be the option to fix it.