Help needed. Switched ISPs and now my internal network is sub par

[revelstone777]

I recently switched from Xfinity to ATT fiber and my network performance has gone to hell. I put the fiber gateway into passthru and assigned the mac of the router and that much seems to work. I can web into my Blue Iris and home automation systems from outside just fine. Internally, everything is slow. Web searches are painfully slow and even wifi seems to be intermittent. I'm running an RT-AX88, not a pro with the latest Merlin build on it. In DHCP I have 8.8.8.8 and 8.8.2.2 configured for DNS servers. When I run Speedtest through my router i get <400MB, when I connect directly to the gateway wifi I get >900MB. Any ideas? Did I miss something in the gateway?

Hal

 

[ColinTaylor]

In DHCP I have 8.8.8.8 and 8.8.2.2 configured for DNS servers.

8.8.2.2 is not a valid address. You probably meant to use 8.8.4.4.

Have you put these addresses in the LAN - DHCP Server > DNS Server 1/2 settings? If so, don't. Leave those DNS fields empty. If you want to use those Google DNS servers rather than your ISP's servers put the addresses in the WAN - Internet Connection > DNS Server settings.

When I run Speedtest through my router i get <400MB, when I connect directly to the gateway wifi I get >900MB.

Ignore the router's built-in speed test and run the test from a LAN client. Your speed can become limited by the router's CPU if you've enabled options like QoS and AiProtection.