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D-Link DIR-865L Wireless AC1750 Router Review

Test Setup

Figure 1.1

The router was flashed to the latest firmware, SPI firewall disabled and the machine on the LAN side is placed in the DMZ.

For the testing of the router's routing throughput, we used two machines, one connected to the WAN port of the router and the other to the LAN port as shown in Figure 1.1. For both WAN to LAN and LAN to WAN tests, we ran two benchmark software, PassMark Performance Test and IPerf. Each test was repeated three times and the average is taken as the final result. Figure 1.2 shows the following parameters used on the IPerf.

>iperf -s -w 128k
>ipert -c [server address] -w 128k -P 5

Figure 1.2

Matrix21 Max Session Tool was used to test for the maximum number of sessions. Since the maximum connection the machine could generate is 41,000 sessions, which is far less than most of the current routers are able to handle. With reference from Figure 1.3, we devised a method to run a number of  server-client pairs simultaneously. This is accomplished through the use of virtualization. So, 41,000 per pair multiply by the total number of pairs would give the total number of simultaneous sessions.

Figure 1.3

For wireless throughput tests, one machine is connected to the LAN port and the other by wireless. A 200MB file is then transfered from the LAN machine over to the wireless machine and vice versa. This is to test the upstream and downstream quality of the wireless link. The wireless connection is encrypted with WPA2-AES. The test is performed on the 40MHz channel and the 80MHz channel (5 GHz only). The wireless client is then moved to different rooms (Figure 1.5) and the tests are repeated again. This is to compare the transfer quality when the signal line of sight is being obstructed.

Figure 1.4


These are the hardware specs of the machines used in this testing.


OS: Microsoft Windows 7 Sp1 64-bit
CPU: I7 920 @ 3.4GHz
NIC: Intel Pro/1000 ET Dual


OS: Microsoft Windows 7 Sp1 64-bit
CPU: AMD Turion X2 RM-74 2.2GHz
NIC: Realtek 8111B
WiFi: Netgear A6200 AC Adapter


Test Results


Firmware Version 1.03


Routing Throughput
Direct Connection 942 Mbps
Wan to Lan 932 Mbps
Lan to Wan 936 Mbps
Max. Sessions 45659


USB Storage Throughput
  Read Write
SAMBA 58.4 Mbps 74.1 Mbps

For this test we attached a 3.5" portable hard drive to the USB port. The drive was formatted to NTFS. We then transferred a 200MB data payload to the drive. The DIR-865L only has HTTP and SAMBA file sharing services. HTTP only allows files to to be read but not write so we only perform the test on SAMBA. Performance throughput seems at an average rate.

2.4 GHz Wireless Throughput
Location A B C D E
2.4 GHz 40Mhz Downstream 82.2 Mbps 85.4 Mbps 61.9 Mbps 78.7 Mbps 89.9 Mbps
2.4 GHz 40Mhz Upstream 67.3 Mbps 71.0 Mbps 64.4 Mbps 68.8 Mbps 84.4 Mbps

Except for location C, wireless throughput stayed consistent among the other four locations. At location C where the room which was the furthest from the router, yields a respectable throughput.

5 GHz Wireless Throughput
Location A B C D E
5 GHz 40Mhz Downstream 186 Mbps 157 Mbps 130 Mbps 174 Mbps 177 Mbps
5 GHz 40Mhz Upstream 177 Mbps 166 Mbps 80.5 Mbps 144 Mbps 161 Mbps

With the 5GHz band, wireless throughput yields double of the 2.4GHz band. Also, similarly to the 2.4GHz band, throughput stayed consistent among the four locations.

5 GHz AC Wireless Throughput
Location A B C D E
5 GHz 80Mhz Downstream 201 Mbps 221 Mbps 102 Mbps 236 Mbps 240 Mbps
5 GHz 80Mhz Upstream 182 Mbps 198 Mbps 94.9 Mbps 206 Mbps 218 Mbps

With the 5GHz on ac mode, performance gain is about 21% as compared to 5GHz at 40MHz channel.

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