Asus Router RT-AC68U Causing Lag On Wired Connection

[xxjonsyxx]

I have an asus rt-ac68u router that seems to be causing me grief. My house is wired so that from outside goes to my ISP router. From there 1 wire goes to a switch. From there I have 8 cables going to 4 different plugs in different rooms (2 ports per room). I have tested all of the cables and they all test good. The asus router is plugged into one of these ports in the living room to give wifi signal around the house. I have the wifi on the ISP router turned off. My gaming computer is hooked wired into a port as well so my computer goes to the switch to the isp and out meaning it isn't running through the asus router at all. Every so often I will get infinite ping spikes while gaming on my computer. I have found that turning off the router causes it to stop. I assumed it was a bandwidth issue so I turned on QoS and set it far below my ISP bandwidth.

THIS HAPPENS EVEN WITHOUT ANYTHING CONNECTED TO THE ASUS ROUTER.

I used tracert while this was happening and had less than 1ms of ping between my computer and the ISP router which after that is outside which made me think it was my provider yet when I turn the asus router off it stops the lag. This is making no sense to me and really need a new perspective on it. Thanks.

 

[das_stig]

I have the AC87U, which is it's bigger brother and I'm setup like this .. ISP (modem/bridge mode) -> router -> switch -> devices.

You want as little internal traffic as possible getting to the router.
Use Merlins firmware as it fixes a lot of issues with Asus firmware.
Don't use QOS unless you have too as it disables hardware acceleration of traffic handling.
If possible use link aggregation between the router and the switch for better bandwidth.

 

[bill001g]

You are correct it makes no sense. The asus really should not have any affect. The traffic should go from your pc to the switch to the router and ignore the asus. All I can think of is you have a ip conflict. Make sure the asus is really running as a AP. You need to make sure it is not using the same IP as your main router or any pc in your network. You need to make sure dhcp is disabled. If you are using the wan port and the bridge/ap setting it should do that automatically.