Max WAN-LAN throughput QOS enabled Merlin Fork

[geekmiki]

Hi,

Hardware:
AC68U - Merlin Fork 374.43 Update 10 (latest update)
Cable connection 200/20

The problem:
With QOS enabled my max download speed is 165 Mbps, When I disable it I reach 200 Mbps. (FTP test download, same file, same server)
QOS is configured in such a way that I should be able to reach near 190 Mbps for FTP downloads.

My question:
Is the AC68U maxed out with a 200Mbps connection and QOS enabled?

If that's the case, what router would support this combination?


Thank you in advance!

 

[mstombs]

Without QOS the firmware can use Broadcom fastnat cut-through-forwarding ctf. I'm surprised the AC68U not capable of more, doesn't sound much faster than the N66U - perhaps you need to test with multiple streams? Years ago we used to use old PCs with a couple of gigabit NICs and could saturate the wires..

 

[RMerlin]

Without QOS the firmware can use Broadcom fastnat cut-through-forwarding ctf. I'm surprised the AC68U not capable of more, doesn't sound much faster than the N66U - perhaps you need to test with multiple streams? Years ago we used to use old PCs with a couple of gigabit NICs and could saturate the wires..

Without NAT acceleration, the RT-AC68U should be able to reach around 350 Mbps based on my tests.

 

[mstombs]

With NAT acceleration my N66U can do 216Mbps in external test using speedtest.net, smart QOS drops that by about 50%, this website has many great reviews but the reported speeds do not seem to be achievable in practise? How much faster is the Netgear R7000?

http://www.smallnetbuilder.com/tools/charts/router/view

 

[RMerlin]

With NAT acceleration my N66U can do 216Mbps in external test using speedtest.net, smart QOS drops that by about 50%, this website has many great reviews but the reported speeds do not seem to be achievable in practise? How much faster is the Netgear R7000?

http://www.smallnetbuilder.com/tools/charts/router/view

The R7000 would be slightly faster than an RT-AC68U, but not by much. Maybe an extra 50 Mbps I would estimate.

Tim's reported speeds are with NAT acceleration enabled, and I've seen similar speeds myself when testing throughput between the LAN and WAN interface, so those numbers are realistic. Some Asian users even have 1 Gbps ISP connections, and they are hitting over 800 Mbps with speed tests.

 

[geekmiki]

Without NAT acceleration, the RT-AC68U should be able to reach around 350 Mbps based on my tests.

Should I consider upgrading to 378.52 in order to achieve those speeds with QoS enbaled? Or does my problem seem to be exclusively QoS config based?

Just for info I'm using an Intel V-217 NIC on the test PC and as mentioned I reach 200Mbps on speedtest with QoS disabled and ~165Mbps when it's enabled.

 

[RMerlin]

Should I consider upgrading to 378.52 in order to achieve those speeds with QoS enbaled? Or does my problem seem to be exclusively QoS config based?

Just for info I'm using an Intel V-217 NIC on the test PC and as mentioned I reach 200Mbps on speedtest with QoS disabled and ~165Mbps when it's enabled.

You need to use Adaptive QoS to be able to keep using NAT acceleration. With Adaptive QoS, you should be able to hit around 500 Mbits of max throughput.

Keep in mind that the performance will vary based on the complexity of your rules.

 

[geekmiki]

You need to use Adaptive QoS to be able to keep using NAT acceleration. With Adaptive QoS, you should be able to hit around 500 Mbits of max throughput.

Keep in mind that the performance will vary based on the complexity of your rules.

Thanks for the info. I guess I have to update to a newer version, since adaptive QoS doesn't seem to be supported by Merlin Fork 374.43 that I'm using now.

 

[john9527]

Should I consider upgrading to 378.52 in order to achieve those speeds with QoS enbaled? Or does my problem seem to be exclusively QoS config based?

Just for info I'm using an Intel V-217 NIC on the test PC and as mentioned I reach 200Mbps on speedtest with QoS disabled and ~165Mbps when it's enabled.

I think we are getting a little lost in the weeds here......let me see if I have this right.
- You have a 200Mbps service and can hit 200Mbps without QoS active. The AC68 should be able to support up to about 350Mbps without NAT acceleration, so it may be worthwhile to test disabling NAT acceleration and verifying you can still hit those numbers (enabling QoS will automatically disable NAT acceleration and this test will separate the two functions).
- Assuming the above works (it should), it comes down to your QoS rules. The most important of which in the Asus QoS implementation is the upload rules. It may be worthwhile to post your QoS rules to see if we can see anything that would account for the change.

 

[Deepcuts]

AC68 here and doing just fine @ 934 Mbps.