linksys mr8300， Set the fiber optic modem to bridge mode. First, connect the laptop with a fiber optic modem and use the laptop to dial up the internet. The speed is 500mbps and there is no problem. When the fiber optic modem is connected to MR8300 and dial-up to the internet using the latter, the speed is only half 200mbps. What should I do
ipq40xx with its 716 MHz quadcore ARMv7 CPU is not exactly a runner. ~300 MBit/s is around the most you can get out of that (a tad more with software flow-offloading enabled), it's not fast enough for >500 MBit/s.
It's also worth noting that you are using an old version of OpenWrt that is EOL and unsupported. It is not safe to use anymore since there are known security vulnerabilities that will never be patched. You should upgrade to a supported release.
Isn’t mr8300 wifi 5GHz 867Mbps?
theoretical bi directional max throughput value achieved in a lab, at best.