ASUS RT-AC87U on CenturyLink Gigabit Fiber

[ngerasimatos]

I recently removed the CenturyLink provided router as it was pure garbage and replaced it with an ASUS RT-AC87U. I have the VLAN tagging and everything working properly but my gigabit speeds are good but not as high as I expect.

MacBook-Pro:~$ speedtest
Retrieving speedtest.net configuration...
Testing from WAN ...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by SoftLayer Technologies, Inc. (Seattle, WA) [7.55 km]: 19.663 ms
Testing download speed................................................................................
Download: 633.18 Mbit/s
Testing upload speed................................................................................................
Upload: 780.20 Mbit/s

I am not sure if there is a specific setting or value I can adjust to get more throughput. COnnecting directly to the ONT with the router removed I can pull 988.20 Mbit/s so there must be something in the router config that is slowing down the speeds or perhaps the router itself just isn't powerful enough. I have read online that others have pulled full gig speeds from the AC87U with Merlin firmware.

Linux version 2.6.36.4brcmarm (merlin@ubuntu-dev) (gcc version 4.5.3 (Buildroot 2012.02) ) #2 SMP PREEMPT Wed Oct 4 15:11:10 EDT 2017

 

[jonkul]

Is your hardware acceleration active? Check either under LAN -> Switch Control, or Administration -> Performance Tuning. If your router CPU% is hitting 100% during speedtesting, that's also a sure sign that it's not active. Seems that it looks a little bit different for all routers, but ideally you want it to say CTF (Cut Through Forwarding) and FA (Flow Acceleration) active at the same time.

 

[mluker]

I have the same router (ASUS RT-AC87U) on CenturyLink Gigabit Fiber and I get 500/950. So mine has issues as well. Using the centurylink supplied router I get 950/950. I tried Merlin but it didn't make s difference. Did you ever figure anything out?