Review ASUS RT-AC86U, Feature-packed advanced wireless router
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 Sep 10 2018, 10:26 AM
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#1
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Junior Member
555 posts Joined: Jun 2008 
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To buy and use the China unit, here are some of the important thing as your checklist: 1. The current latest hardware version is R1.5. This hardware is not regionally locked and therefore you can use for Malaysia WiFi spectrum. If you get other hardware version, maybe it will work or maybe it will not work properly with WiFi devices in Malaysia. 2. For the power adapter, you just need to plug it in a universal converter, or a universal power socket. No need voltage conversion as it can be used for 240V power line. 3. Change your language to English. Download the official latest firmware from Asus support website, and flash it manually. 4. Once you flashed with the latest international firmware, it is recommended to flash with latest Merlin firmware (current version is 384.6). I found Merlin firmware to be stabler and more configurable for Malaysia environment. 5. Go to Wireless > Professional, set the Region from China to "Asia" (not Singapore). This is very important. You will see the available WiFi bands are slightly different among the regions. If your router does not have this option or unable to change it, then it is a locked hardware version. 6. Set WAN internet detection to "PPP echo". Set both MTU and MRU to 1480 (from default 1496). You will face network problem with 1496. 7. Go to LAN > IPTV, set to Unifi-Home for Unifi (set to Maxis for Maxis). 8. Go to Administration > System, set time zone to Kuala Lumpur. |
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Sep 10 2018, 02:33 PM
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#2
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(Barricade @ Sep 10 2018, 01:44 PM) Can I know what's no.6 for? I didn't set like you but i can connect no problem. PPP echo is used to reconnect your Internet in case it is down. If it is not set properly, after your Internet down, it will not auto-reconnect, and you will need to manually reconnect it. MTU and MRU are Maximum Transmission Unit and Maximum Receive Unit. For most ISP, they will be of the same value. To get the optimum MTU/MRU, open command prompt in your Windows computer. Run "ping -f -l 1452 8.8.8.8" (or any external server that you can ping) and you will get 0% loss. Run "ping -f -l 1453 8.8.8.8" and you will get "packet needs to be fragment" with data loss. If this is the case, your optimum MTU/MRU is 1452 + 28 = 1480. Because any value after 1452 will not pass the test. You can set it to smaller value without problem, but then your Internet connection is not optimum because need to send more packets for the same amount of data. In order to use the default 1492, run the ping test for 1492 - 28 = 1464. If you pass the ping test, then you can leave it as 1492, otherwise you will face Internet speed issue. |
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Sep 10 2018, 06:45 PM
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#3
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(Barricade @ Sep 10 2018, 03:14 PM) Thank you so much for the detailed explaination. I learn something new today, and it's very technical to me. Actually it is well explained in TP-Link website: https://www.tp-link.com/us/FAQ-190.html |
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Sep 12 2018, 11:40 PM
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#4
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Junior Member
555 posts Joined: Jun 2008
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Getting this cooling solution. Looks cool. Hopefully can fit with AC86U as well.
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Sep 13 2018, 01:43 PM
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#5
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555 posts Joined: Jun 2008
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I just installed the fan. Now CPU temperature reduced from over 70 degree to 50+ degree. It arrived in 24 hours from Lazada purchase. 
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Sep 14 2018, 12:18 AM
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#6
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(maldini8289 @ Sep 13 2018, 08:29 PM) Hi can share the link? Thanks. https://www.lazada.com.my/products/cooling-...s597610954.htmlSeems out of stock now. Need to wait or find another vendor. |
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Sep 16 2018, 01:16 PM
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#7
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555 posts Joined: Jun 2008
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QUOTE(stinky @ Sep 15 2018, 07:27 PM) Hi PPPFong Here is my setting:Can you teach me how to to setup IPv6 for UNIFI? Connection Type: Native Interface: PPP DHCP-PD: Enable Release prefix on exit: Enable Connect to DNS Server automatically: Disable IPv6 DNS Server 1: 2606:4700:4700::1111 IPv6 DNS Server 2: 2001:4860:4860::8888 IPv6 DNS Server 3: 2606:4700:4700::1001 Enable Router Advertisement: Enable |
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Sep 16 2018, 09:53 PM
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#8
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555 posts Joined: Jun 2008
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QUOTE(wakhaiha @ Sep 16 2018, 05:09 PM) hi. I just bought this router few weeks ago for TM TP-link wifi router replacement. I recently got unifi turbo-ed 500mbps. When speedtest using TP-link ac1300 via LAN cable, max speed i can get is only ~200mbps. thankfully after change to rt-ac86u, my speedtest using LAN is reached 500mbps. however, I am faced with 2 problems: Try to turn off QoS.1) for wifi 5G, max speed I can get is only ~200mbps. I even run the test near to router to reduce the interference, but the speed result is just the same. is there is any way to improve the wifi speed? 2) I have some problem with my unifi tv after changed to this router. unifi channel load normal at the start. no problem if switch to other channel at this time. but after watch for around 30 minutes, tried to switch to other channel, the new channel will got lag, sometime just heard the voice, no video, just blackscreen. the same happen to all channels. need to turn off stb for a while to start watch unifitv again. at the beginning, I use the official ASUS firmware, after encounter the problems above, I flash merlin firmware. However, the same problem occurred. my head is buntu right now. Also, go to System > Wireless Log to check your connected Rx/Tx speed. |
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Sep 17 2018, 01:55 AM
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#9
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555 posts Joined: Jun 2008
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If you are running iperf3 using laptop, try disable any firewall (including the one in your antivirus) on both server and client side. Also, try run iperf3 using the "-w 433M" option for your Intel wireless supporting 433 Mbps Tx/Rx rate. You might also want to try "-R" to reverse the server and client sending. QUOTE(wakhaiha @ Sep 16 2018, 10:31 PM) I had turned off QoS, but it just the same. tried iperf, max can get ~230Mbps. also tried move router to other area (without wan access) for wifi testing purpose, to avoid interference. but the result just the same. wireles log: CODE SSID: "xxxx@unifi" RSSI: 0 dBm SNR: 0 dB noise: -92 dBm Channel: 4 BSSID: 4C:ED:FB:AA:3E:E0 Capability: ESS ShortSlot Supported Rates: [ 1(b) 2(b) 5.5(b) 6 9 11(b) 12 18 24 36 48 54 ] VHT Capable: Chanspec: 2.4GHz channel 4 20MHz (0x1004) Primary channel: 4 HT Capabilities: Supported MCS : [ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ] VHT Capabilities: Supported VHT (tx) Rates:  NSS: 1 MCS: 0-11  NSS: 2 MCS: 0-11  NSS: 3 MCS: 0-11 Supported VHT (rx) Rates:  NSS: 1 MCS: 0-11  NSS: 2 MCS: 0-11  NSS: 3 MCS: 0-11 Interference Level: Acceptable Mode : AP Only Stations List              ---------------------------------------- idx MAC        Associated Authorized   RSSI PSM SGI STBC MUBF Tx rate Rx rate Connect Time SSID: "xxxx@unifi_5G" RSSI: 0 dBm SNR: 0 dB noise: -87 dBm Channel: 44/80 BSSID: 4C:ED:FB:AA:3E:E4 Capability: ESS Supported Rates: [ 6(b) 9 12(b) 18 24(b) 36 48 54 ] VHT Capable: Chanspec: 5GHz channel 42 80MHz (0xe22a) Primary channel: 44 HT Capabilities: Supported MCS : [ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ] VHT Capabilities: Supported VHT (tx) Rates:  NSS: 1 MCS: 0-11  NSS: 2 MCS: 0-11  NSS: 3 MCS: 0-11  NSS: 4 MCS: 0-11 Supported VHT (rx) Rates:  NSS: 1 MCS: 0-11  NSS: 2 MCS: 0-11  NSS: 3 MCS: 0-11  NSS: 4 MCS: 0-11 Interference Level: Acceptable Mode : AP Only Stations List              ---------------------------------------- idx MAC        Associated Authorized   RSSI PSM SGI STBC MUBF Tx rate Rx rate Connect Time   D4:25:8B:DA:0A:B6 Yes     Yes     -38dBm No  Yes Yes  No   433.3M  433.3M 00:00:41 iperf result (iperf server run from PC with Gigabit wired LAN): CODE C:\iperf-3.1.3-win64>iperf3 -c 192.168.50.166 Connecting to host 192.168.50.166, port 5201 [  4] local 192.168.50.146 port 57009 connected to 192.168.50.166 port 5201 [ ID] Interval      Transfer   Bandwidth [  4]  0.00-1.00  sec  24.2 MBytes  203 Mbits/sec [  4]  1.00-2.00  sec  26.5 MBytes  222 Mbits/sec [  4]  2.00-3.00  sec  26.6 MBytes  223 Mbits/sec [  4]  3.00-4.00  sec  25.6 MBytes  215 Mbits/sec [  4]  4.00-5.00  sec  26.2 MBytes  220 Mbits/sec [  4]  5.00-6.00  sec  26.1 MBytes  219 Mbits/sec [  4]  6.00-7.00  sec  26.5 MBytes  222 Mbits/sec [  4]  7.00-8.00  sec  26.5 MBytes  223 Mbits/sec [  4]  8.00-9.00  sec  26.4 MBytes  221 Mbits/sec [  4]  9.00-10.00  sec  26.6 MBytes  223 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval      Transfer   Bandwidth [  4]  0.00-10.00  sec  261 MBytes  219 Mbits/sec          sender [  4]  0.00-10.00  sec  261 MBytes  219 Mbits/sec          receiver iperf Done. |
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Sep 17 2018, 05:46 PM
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#10
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(wakhaiha @ Sep 17 2018, 08:33 AM) Thanks. I really forgot about the firewall If you use Apple products such as iPad, try disable all these function in your router: . I will try tonight after the work.I dont know how to check whether my devices support either 1x1, 2x2, or 3x3. Can you share how to check eh? btw, I run the test from different devices (Laptop with Intel® Dual Band Wireless-AC 3165; Xiaomi Mi A1, Ipad pro and Ipad Wifi, AFTV3. All give the same speed) All Beamforming Airtime fairness MU MIMO Roaming assistant If you make a search in SNBForums, the place where you can find and chat with RMerlin, you will find quite a lot of discussion about Apple products compatibility issue with all kind of routers except their own AirPort. |
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Sep 18 2018, 08:43 PM
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#11
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Junior Member
555 posts Joined: Jun 2008
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If you are using stock firmware, try update to the latest version, as it says this version "fixed wifi stability issue". https://www.asus.com/my/Networking/RT-AC86U/HelpDesk_BIOS/ |
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Sep 30 2018, 09:37 AM
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#12
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(Trrienty @ Sep 28 2018, 04:20 PM) How can I enable NAT acceleration for this router? Can’t seems to find it under LAN setting compare to my old AC1200G model There are 2 NAT acceleration mechanisms for RT-AC86U, one is Packet Runner and another is Flow Cache.Flow Cache should be up and running easily. I have trouble getting Packet Runner to be active despite disabling quite a lot of functions. In the syslog, I can see it tried to get up, then immediately shut down itself after detecting something. Maybe because I didn't disable the firewall function. |
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Sep 30 2018, 09:46 AM
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#13
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(thamch @ Sep 28 2018, 06:29 PM) More features. If you want to use AiMesh function, don't use Merlin firmware, as Merlin has taken out AiMesh because he couldn't get it working without problem at the moment.For other differences between Merlin and stock firmware, can refer to the link below: https://asuswrt.lostrealm.ca/features |
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Nov 15 2018, 09:45 PM
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#14
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(CKKwan @ Nov 15 2018, 05:36 PM) Thanks, you have saved my day. Haha... because it is dealing with VLAN setting in the LAN network.It is ridiculous to put this setting under LAN. |
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Dec 3 2018, 10:33 PM
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#15
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(naturalfool @ Dec 1 2018, 09:07 PM) Guys, I looking for my email that tells me my PPPoE username and password but cannot find. Found an email with the username and password for Telekom IPTV only. Is the password the same for PPPoE? Your username should be username@unifiI livechat with TM and was told they need to reset my password and I will get new password by sms within 24 hrs but before I get the password, will not have internet...dang it Your password will be the same if it has not been changed before. |
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Dec 12 2018, 12:41 AM
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#16
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(Verblassen @ Dec 10 2018, 08:27 AM) Yeah. Heard the fans really help. I think if you put both in a pull configuration to suck the hot air out it should be fine. I think blow air in is a better position.When you suck air out from behind, you actually suck air in from the top. When you blow air in from behind, the air will hit the surface inside, reflected and continue to flow out from beside the fan, which you can actually feel it by putting your hand and feel the air flow. You will feel air blowing out from the router. |
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Dec 12 2018, 12:46 AM
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#17
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(Trrienty @ Dec 11 2018, 05:26 PM) Do you mind to tell me how to enable the new mechanism, flow cache and packet runner please Both of them are auto-enabled by the kernel during boot-up.They will auto-disable by the kernel if certain function is on, especially the QoS. Normally, Flow Cache will keep enabled, but Runner hard to keep enabled. You can check for the status in Tools > SysInfo screen (in Merlin firmware). |
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Dec 12 2018, 06:49 PM
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#18
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Junior Member
555 posts Joined: Jun 2008
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QUOTE(Verblassen @ Dec 12 2018, 12:09 PM) Oh yeah you're right ! So used to the Pc config I forgot that the router has vents at the top as well. How about dust build up though I didn't dismantle my unit. But looking at this photo taken by somebody, dust is likely to build up at the bottom on top of those USB and LAN connectors, and around the soldiering legs of the ICs, regardless you blow air in or suck air out or without using fan. Motherboard facing back:  Motherboard facing front:  The front part has a big metal piece, the ideal solution is to dig hole in front of the router, stick the fans onto the metal piece inside, and blow air out. This post has been edited by ppfoong: Dec 12 2018, 06:58 PM |
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