Synology Router RT2600ac Review

Speed Test

iperf3 was used to measure the throughput of the Synology RT2600ac on wired, 2.4 GHz and 5 GHz. The following iperf3 parameters were used for the tests:

Test Command
Uploadiperf3 -c <iperf3 server> -w 640k -P 5 -t 60
Downloadiperf3 -c <iperf3 server> -w 640k -P 5 -t 60 -R

 

The following equipments were used for the speed test:

Type Equipment
Router Synology RT2600ac on 1.1.3-6447
AC2600 (2.4 GHz: 800 Mbps, 5 GHz: 1733 Mbps)
iperf3 server iperf3 server docker container on Synology DS1515+
iperf3 client iMac 27" (mid-2011) with D-Link DIR-890L as wireless client
Wireless Client DIR-890L on dd-wrt
AC3200 (2.4 GHz: 600 Mbps, 5 GHz: 1300 Mbps + 1300 Mbps)

 

The iperf3 server is connected to the WAN/Internet side of the Synology RT2600ac while the iperf3 client is on the LAN side of the Synology RT2600ac. The wireless client is placed 3 meters away from the Synology RT2600ac.

The speed test for wireless on 2.4 GHz and 5 GHz spectrum will be limited to 600 Mbps and 1300 Mbps. Hence, the results will be better with a matched wireless client.

 

Using the DIR-890L as wireless client

Using the D-Link DIR-890L as a wireless client for 5 GHz (1300 Mbps) and 2.4 GHz (600 Mbps).

As I do not have a compatible wireless client for the testing, I decided to make use of the DIR-890L as a wireless client instead. So my testing client is hooked up to the 1 Gbps LAN port for the entire wireless test.

 

WAN-LAN (wired without Traffic Control)

In this test, the Synology RT2600ac managed to clock 940 Mbps and 942 Mbps for upload and download respectively. This is also a baseline test to ensure the testing endpoints do not bottleneck the speed test.

The RT2600ac managed to upload at an average speed of 940 Mbps on wired connection.

The RT2600ac managed to download at an average speed of 942 Mbps on wired connection.

 

WAN-LAN Speed Test (Traffic Control Enabled)

The RT2600ac’s throughput is unaffected even when traffic control is enabled. Great!

Packet filtering or Traffic Control often impacts the throughput as it needs to inspects the packet or limit the flow rate according to some configured rules. Hence, traffic control was enabled to see if the RT2600ac is affected in terms of throughput.

I am glad to know that the RT2600ac’s throughput is not affected even when traffic control is enabled. It managed to clock 940 Mbps and 942 Mbps for upload and download respectively.

With Traffic Control enabled, the RT2600ac managed to upload at an average speed of 940 Mbps on wired connection.

With Traffic Control enabled, the RT2600ac managed to download at an average speed of 942 Mbps on wired connection.

 

WAN-LAN Speed Test (with Intrusion Prevention System enabled)

Intrusion Prevention System (IPS) is one of the packages that you can add to the RT2600ac via the Package Center. There are two modes of operations – ‘Detect’ or ‘Prevent’.

The settings used for the IPS in this test are:

The Intrusion Prevention settings used for the test.

The signature rules enabled for the test.

The signature rules enabled for the test.

In ‘Detect’ mode, the Synology RT2600ac clocked 302 Mbps and 599 Mbps for upload and download respectively. The CPU and memory utilisation was observed to be higher during the transfer. The CPU utilisation, in particular, was almost maxed out while memory usage hovered around 60%.

On IPS ‘Detect’ mode, the router managed an average upload speed of 599 Mbps on wired connection.

On IPS ‘Detect’ mode, the router managed an average download speed of 599 Mbps on wired connection.

On IPS ‘Detect’ mode, the CPU usage spiked up during the speed test.

In ‘Prevent’ mode, the Synology RT2600ac clocked 49 Mbps and 71.3 Mbps for upload and download respectively. The CPU and memory utilisation was also observed to be higher during the transfer. The CPU utilisation, in particular, almost maxed out while memory usage hovered around 60%.

On IPS ‘Prevent’ mode, the router managed an average upload speed of 49 Mbps on wired connection.

On IPS ‘Prevent’ mode, the router managed an average download speed of 71.3 Mbps on wired connection.

On IPS ‘Prevent’ mode, the CPU usage spiked up during the speed test.

Wireless on 5 GHz spectrum

As mentioned earlier, the speed will be limited by the wireless client (limited to 1300 Mbps).

On the 5 GHz wireless spectrum, the Synology RT2600ac clocked 406 Mbps and 485 Mbps for upload and download respectively.

The RT2600ac managed to upload at an average speed of 406 Mbps on 5 GHz.

The RT2600ac managed to download at an average speed of 485 Mbps on 5 GHz.

 

Wireless on 2.4 GHz spectrum

As mentioned earlier, the speed will be limited by the wireless client (limited to 600 Mbps).

On the 5 GHz wireless spectrum, the Synology RT2600ac clocked 161 Mbps and 125 Mbps for upload and download respectively.

The RT2600ac managed to upload at an average speed of 161 Mbps on 2.4 GHz.

The RT2600ac managed to download at an average speed of 125 Mbps on 2.4 GHz.

 

Speed Test Summary

Test Upload (Mbps) Download (Mbps) Notes
Wired940942
Wired (Traffic Control enabled)940942
Wired (IPS enabled – 'Detect')302599
Wired (IPS enabled – 'Prevent')4971.3
Wireless 5 GHz406485 Wireless client is limited to 1300 Mbps
Wireless 2.4 GHz161125 Wireless client is limited to 600 Mbps

 

Unlike the RT1900ac, the Synology RT2600ac‘s throughput is unaffected when traffic control is enabled. Now, it is possible to rate-limit certain clients without impacting the overall throughput.

 

  • fdsaf fdsf

    Hello. What is performance with IPS on?

  • Have updated the speed test with intrusion prevention system enabled in either ‘Detect’ or ‘Prevent’ mode.

  • masterkaj

    So I upgraded to the RT2600ac based off this review. My WAN to LAN performance with traffic control enabled on the 2600ac is cut around 80mbps when enabled (download speed only, upload is not effected).

    Traffic Control Off: 360mbps download, 24mbps upload
    Traffic Control On: 280mbps download, 24mbps upload

    That’s setting my max download speeds to 350mbps (43750 KB/s) and 24mbps upload (3000 KB/s). Any ideas why I am seeing over a 20% drop in download speeds due to traffic control? I had the same problem with the RT1900AC router and was hoping this new version would alleviate my issue.

  • I think the line speed setting on the RT2600ac could be slightly off. If you set it at a higher value (e.g. 51200 KB/s) you will notice that you should get it at near line speed on the RT2600ac. However, if you were to do this on your former RT1900ac, it would be limited by the hardware of RT1900ac.

    If your intention is to limit a particular client to certain speed limits then set a higher value (i.e. 51200 KB/s) in the overall traffic control setting and set the speed limit (i.e. 8000 KB/s) on the client.

    My advice for you would be to log a ticket with Synology to look into it further as they would probably need to further tune the QoS scheduler on the platform.

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