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Widely variable speed tests on wired connection R6700v3
Just replaced my old 6700v3 with a brand new one. After going through the setup via the nighthawk app it forcefed the router a firmware update. Version on the router portal says V1.0.4.120_10.0.91...
A couple things.
1. don't trust the built in speedtest. It isn't accurate at speeds over 300-500mbps because it rarely picks an appropriate server
2. Speeds will vary over that 800mbps even on some test sites. I've had some that reliably max out gigabit an others that strugged.
3. The R6700 needs ctf (cut through forwarding) to hit gigabit speeds. cut through forwarding forwarded all traffic without packet inspection. Certain services disable cut through forwarding and that puts packet inspection on the cpu. Which wasn't fast enough to max out gigabit. these include qos, access control, traffic monitoring, and parental controls. Sometimes you can just disable all those services and reboot and it works. Othertimes I've seen CTF not get re-enabled after disabling those services. In those cases, a factory reset is needed. What I usually tell people is try the factory reset and test its speeds with everything in a default configuration. If it maxes out speeds, then start making your changes and test it.
4. If after a factory reset, you're still not hitting full speeds, try installing version 1.0.4.106 of the firmware. Do a factory reset and reinstall. disable auto updates. Then test it.