New router: MAC address and DNS issues
Our old router was becoming unreliable, so I purchased a NetGear R6700 v3 as a replacement.
During self-install, I found that the router could not connect to the internet via the cable modem using it's default MAC address, but was able to by using the computer MAC address. That is fine on it's own.
The second issue is that automatic DNS via the router does not work for any attached device. Instead, all devices need to set their DNS manually (we use 126.96.36.199 and 188.8.131.52). This is quite a nuisance, especially for the less tech-savvy users.
I contacted Comcast support with the MAC address of the new router, which they said would be "entered into the system" but that never resolved anything.
I'd like to resolve at least the DNS issue. I do suspect these issues are related (but could be wrong).
Can someone offer advice on how to proceed from here?