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Asus RT-AX88U Pro - Traffic Analyzer Causing limits in download speed

The_Bishop

Occasional Visitor
This has been something I've been beating my head against for a long while.

I've got 2Gb service from Xfinity. My own modem (Arris S34) connected to the AX88U Pro on the 2.5Gb port, my PC is hard wired via a 2.5 switch connected to the 88U Pro. 2.5 network card in said PC.

If I run a cable directly to the modem from my PC, I get 2.1-2.2 very reliably. Through the previously configured router I get 1.4-1.5.

I just did a complete wipe of the router to install the latest 3006.102.5 firmware. Factory reset in the router web interface, install the new firmware, reboot router, WPS button reset, reboot router, factory reset via web interface. Yeah, it's probably overkill but I'm trying to eliminate any variables (been having strange wifi/router crashes on latest 3004, no additional addons just Merlin).

So, long way around to my point. I did a basic config of the router to get the Wifi up so family will quit complaining. Run a speed test from my PC, and I'm getting 2.1-2.2. Great! Apparently is was some prior firmware oddness.

I start adding in the services I previously used. First up is the AIProtection. (I have a teen that's not the brightest about staying away from sketchy sites despite numerous discussions) Since I'm curious, I run a speed test. All good. Next up is the traffic analyzer. I use this to see if my teen is staying up to 4am on her PC using discord. Another speed test. Suddenly down to 1.5gbps. Curious, I disable traffic analyzer and re-test... Speeds back to 2.1-2.2.

Well, now I know what's causing the slowdown and I'm assuming it's CPU bound in the router which is slightly disappointing. During the speed test Core 1 (of 4) hits 96% utilization. Surprised the load isn't spread/more balanced.

The tests were all done at the same server to avoid that variable.

Should I consider a newer router so I can use all the features I would like to without the slowdown?

Traffic Analyzer on:
1758989724693.png


Traffic Analyzer off:
1758989555462.png
 
What do you get with Asus firmware?
 
AiProtection speed tax. The extra features you use come at a cost.
Well documented.
 

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