Asus RT-AC68U router
all GigE wired home network
When I had the gateway in gateway mode I got anywhere from 120Mbs-180Mbs speed tests... when I switched to bridge mode speeds dropped to ~63Mbs... what gives??
Solved! Solved! Go to Solution.
I and others here run the same router. Log into the 68U, navigate to the LAN.....SWITCH CONTROL page and ensure that the NAT Acceleration is set to Auto. This essentially is a bypass (Officially, Cut Through Forwarding), provided by the Broadcom chipset, which bypasses the router CPU. With it enabled, the router fires out the data as soon as it arrives. If you turn on items such as QOS, any type of traffic monitoring and others, they will kick off the NAT Acceleration. You take a double hit on the data throughput as the data is routed to the processor, and, the processor then does something with or to the data prior to sending it out via LAN or wireless connection. Give that a look and let us know if that is the cause of the slower performance.
Note: I'm making an assumption here that you are comparing a pc connected to the modem speed (in Gateway mode) with a pc connected to the 68U speed (modem in Bridge mode). In either mode, Gateway or Bridge, you should see the same port speed out of the modem. What happens beyond that is usually where issues come up for varying reasons.
There's an issue with that setting which turned up in the latest firmware update. When I try to set it to Auto, it goes through the process, which takes a long time, then it shows Disabled again once it says complete. Having said that, I am using the new AiProtection features, so there may be something there which is not allowing Auto. I'm going to try turning AiProtection off to see if it makes any difference.
FWIW, I do not have the OP's problem. I'm on the Hybrid 150/15 plan and get over 200mbps on downloads.
EDIT: Tried it again after turning off AiProtection and it made no difference. Still get Disabled for NAT Acceleration. I've noticed that I get NAT Moderate notifications during online gaming whereas, before the firmware update, I always got Open.
I think it is cat5... is that really going to make a difference? The cable that went from gateau to computer was likewise Cat5 and I still was able to get 180Mbs? Or is between gateway and router different?
Hard to say... but at the end of the day, Cat5 is not officially supported for gigabit Ethernet. That doesn't mean that people (including me) haven't successfully done GbE over Cat5, at least over short distances, but it's still outside the spec...
My view: take the router and a decent laptop with a GbE port down to where the modem is and test everything using short Cat5E/6 cables. If you get the same results than with the house wiring, you'll know I was wrong. 🙂