[Беспроводная сеть] — Введение в профессиональные настройки.
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[Беспроводная сеть] — Введение в профессиональные настройки.
Примечание: Некоторые пункты настроек могут отличаться в зависимости от модели устройства и версии прошивки.
В разделе [Беспроводная сеть] > в закладке [Профессиональные] представлены настройки, актуальные для каждого частотного диапазона.
1. Диапазон: Выбор необходимого частотного диапазона: 2.4ГГц или 5ГГц
2. Включение радиомодуля: Выберите [Да], чтобы включить.
3. Включение беспроводного планировщика: Эта настройка позволяет администратору локальной сети роутера менять время её отключения для экономии электронергии и для безопасности сети.
4. Беспроводный планировщик: Включить радиомодуль по дате (дням недели): даты работы сети роутера.
5. Беспроводный планировщик: Включить радиомодуль по времени: временной интервал работы сети роутера.
6. Беспроводный планировщик: Включить радиомодуль по дате (выходные дни): даты работы сети роутера (выходные дни).
7. Установка изолированной точки доступа: Включение этой функции изолирует доступ друг к другу для устройств Wi-Fi-клиентов, подключённых к сети роутера. Эта функция актуальна, если к сети роутера часто подключается большое количество клиентских устройств.
8. Roaming assistant: В сетевой топологии (схема сети), включающей в себя несколько точек доступа или беспроводных повторителей, устройства wi-fi-клиенты могут сразу не подключиться к точке доступа с наилучшим сигналом, т.к. они по умолчанию начнут подключаться к главному роутеру сети. Если включить Roaming assistant, то устройства-клиенты автоматически станут переподключаться к точке доступа с наилучшим сигналом, согласно текущему месту своего расположения.
9. Включение многоадресной маршрутизации IGMP Snooping: Запуск процесса отслеживания сетевого трафика IGMP между устройствами и оптимизация multicast -трафика.
10. Multicast скорость доставки пакетов (Мбит/с): Регулирование скорости доставки пакетов multicast.
11. Тип преамбулы — определяет длину CRC (циклического избыточного кода), как способ обнаружения ошибок при передаче данных между беспроводными устройствами. Рекомендуем настроить все беспроводные устройства на один и тот же тип преамбулы. В зонах с плотным сетевым трафиком используйте короткую преамбулу. Для старых беспроводных устройств используйте длинную преамбулу.
12. AMPDU RTS: Используйте запрос RTS для AMPDU. Включение этой функции позволяет создать группу кадров перед их передачей и использовать RTS для каждого AMPDU для связи между устройствами.
13. RTS Threshold (Порог готовности к передаче): Уменьшите сигнал RTS (запрос на отправку), чтобы повысить эффективность передачи в условиях шумной среды или слишком большого количества устройств-клиентов.
14. Интервал DTIM: поле уведомления по трафику доставки для беспроводных клиентов — когда им слушать эфир, ждать широковещательные и многоадресные сообщения от роутера. Эта функция будет полезна для компьютеров, настроенных на переход в режим сна, потому что в DTIM-уведомлении есть информация о пакетах, отправляемых роутером.
15. Beacon Interval — временной интервал между передачами маякового импульса. Значение по умолчанию — 100 (единица измерения — миллисекунды или 1/1000 секунды). Уменьшите интервал маяка, чтобы улучшить передачу данных в непригодных для использования средах передачи данных или перемещающихся клиентах, но тогда клиентские устройства могут начать терять сигнал роутера.
16. Включение TX Bursting: повышает скорость передачи (от точки доступа к клиенту) устройств по протокоу 802.11g.
17. Включение WMM APSD: Включение или выключение WMM APSD (Автоматическое энергосбережение).
18. Сокращение помех USB 3.0: Включение этой функции даёт прирост производительности беспроводной сети в диапазоне 2,4 ГГц. Отключение этой функции увеличивает скорость передачи пакетов через порт USB 3.0 и, соответственно, может снизить производительность на 2,4 ГГц.
19. Улучшенное агрегирование AMPDU: объедините максимальное число фреймов MPDU в AMPDU.
20. Optimize Ack Suppression: максимальное количество удаляемых ACK — фреймов подряд.
21. Тубро — квадратурная модуляция: поддержка 256-QAM (MCS 8/9) . Рекомендуется оставить в автоматическом режиме.
22. Airtime Fairness (ограничение сессии по времени передачи пакетов): настройте Airtime Fairness при одновременной работе нескольких ресурсов.
23. Explicit beamforming (формирование луча): сетевой интерфейс клиентского устройства и роутер поддерживают технологию формирования луча. Технология позволяет обмениваться данными о загруженности канала при передаче пакетных данных для повышения скорости загрузки и выгрузки. (Это также называется [Явное формирование луча]).
24. Универсальное формирование луча: для устройств с устаревшими сетевыми интерфейсами, без поддержки технологии формирования луча, маршрутизатор анализирует радиоканал и задаёт направление пакетов для повышения скорости нисходящего канала. (Это также называется [Неявное формирование луча]).
25. Регулировка мощности передатчика Tx: Регулировка мощности Tx для TPC (Transmit power control) и энергосбережения.
Optimize AMPDU Aggregation On or Off (A MPDU)
AMPDU stands for Aggregated MAC Protocol Data Unit. This option is available in most of the router advanced settings for you to enable or disable. In this basic and simple guide, we will discuss what it is, and when you should take advantage of this setting.
Please note that this AMPDU guide is a layman’s guide that does not go into exact technical analysis or key terms. Our goal is rather to help average users configure their router settings that are optimal to their local wifi environment.
A-MPDU Explained Basic and Meaning
The purpose of AMPDU is to improve data transmission by aggregating or grouping together several MPDU blocks. You may also hear the term AMSDU during your research. The only thing that you should know is that they are completely different settings that aggregate different things for the different set of data.
Because of the technical background effects, the A-MPDU option offers a few advantages and disadvantages. There are a few key takeaways from this technology.
1. AMPDU is less efficient in terms of process and speed by itself.
2. AMPDU improves overall network performance by reducing overhead transmitted.
3. AMPDU improves error checking capability because of its additional Block Acknowledgement feature.
Wit these benefits and flaws in mind for the Aggregated MPDU (MAC Protocol Data Unit), we will now discuss situations where you should turn on or off this advanced router setting.
AMPDU On or Off
Below are some of the theoretical situations where the router setting may help you. Please note that these are just general recommendations, your best bet is still by turning only this option on or off to test its actual effect on performance for your wifi network.
When to turn Optimize AMPDU aggregation On
There are two situations where you may want to test with the setting enabled. You should test when either or both of these factors are present in your wifi.
1. You live in a crowded wireless neighborhood with high error rates. AMPDU assists with error checking.
2. You have multiple devices that are connected to your wireless access point or router. AMPDU reduces overhead transmitted.
When to turn Optimize AMPDU aggregation Off
You should generally turn Optimized AMPDU aggregation function disabled when you are running time critical applications such as online gaming or VoIP. The reason is that the AMPDU is less efficient and slower by itself. You want faster and immediate transmission of data rather than aggregation through the router.
Lastly, turn Aggregated AMPDU off if you are using less than 3 actively connected devices in an area with strong wifi signal and less interference. As you will not be able to enjoy any of the benefits that AMPDU router setting offers you.
Asus Router Setup – Wifi Settings
The RT-AX55 is not on sales in many local computer stores and is only available through one of the local broadband providers (M1), which happens to be my current Internet provider. It has four external antennas – 2.4 GHz 2 x 2 and 5 GHz 2 x 2 for transmitting and receiving plus RJ45 Gigabits LAN x 4. A 1.5GHz quad-core processor with 256MB RAM and supports AiMesh. It is an AX1800 (not AX3000) router, and so what is the difference?
| AX1500 | AX1800 | AX3000 | AX5400 | AX6000 | |
|---|---|---|---|---|---|
| 2.4 GHz | 300 Mbps | 574 Mbps | 574 Mbps | 0.6 Gbps | 1.1 Gbps |
| 5 GHz | 1201 Mbps | 1201 Mbps | 2402 Mbps | 4.8 Gbps | 4.8 Gbps |
Background
I am not a fan of any router manufacturer, but most of my local broadband providers always provide bundled options for D-Link and Asus routers while minority for Linksys. Over the past two years, Asus gained much popularity and have become one of the mainstream router brands these days. I used the lone Asus RT-N66U router for two years before adding a spare D-Link DIR-868L and moved the RT-N66U as AP for a duo Wi-Fi setup in recent years. It served me well, and even with the introduction of 802.11ac, it has not bothered me to change my configuration. However, my home broadband contract calls for renewal, and I specifically paid an extra 100 USD to get hold of the RT-AX55 router. At that time, Singapore Huawei launched the AX3 Pro for just 56 USD, including shipping fees from China. I decided to pick up the Asus because I learnt that the AX3 Pro only provides a basic wifi setup. Somebody from the network forum advised me to use it as an AP instead of the primary router.
Unboxing the RT-AX55
The box contains the RT-AX55, power adaptor, a short LAN cable and warranty card etc. It feels light, and the casing is like most routers – plastic. In terms of build quality, I will say a 3.2/5, but I never actually own many of them before. My last Asus RT-N66U router did serve me three years without issues before it broke now, and the service agent offered me a 1-to-1 exchange for a brand-new similar model.
Best Router Placement in House
Even with a modern router, the WiFi coverage may not cover a 100 square meters area, especially at the far end of the house. Therefore, to achieve overall acceptable Wi-Fi strength, it is a no-brainer to place the router somewhere in the middle of the house. Looking at the floor plan of my house, ‘ 2 ‘ is located in the living room right behind the thick bomb shelter wall; hence it is not a good location compared to ‘ 1 ‘. Consider the number of walls the WiFi signals have to penetrate to reach your frequent WIFI usage areas when placing the router.
Wi-Fi Range of RT-AX55
Measured using the Android app Wifi Analyzer on my Galaxy S9, the WiFi signal strength in my Kitchen, Living room, Sleep room, Workroom, and Master bedroom all fall within the green zone. Readings are taken from the centre of each room, but they hover between yellow and green at far corners, such as the master bedroom. The RT-AX55 coverage is better than my old Asus RT-N66U, and I don’t have to go for a main router plus AP network setup anymore.
Wifi Setup – Advanced Settings
The default router IP is http://192.168.50.1/, but you can access it via http://router.asus.com/ as well.
Router Wifi – General
- Wi-Fi Agile Multiband enables Wi-Fi devices to better respond to changing wifi network conditions, for example, roaming to a different AP, band or channel.
- Target Wake Time (TWT) allows the router to communicate with the Wi-Fi devices about when and how often they will wake up to send or receive data. Each device has its timing; hence battery life dramatically increases.
- Protected Management Frames enhance Wi-Fi network security with Capable as the default option for network based on WPA2 and Required for WPA3-Enterprise.
- Group Key Rotation Interval set group keys to rotate among all Wi-Fi devices using a WPA or WPA2 encryption to ensure only authorized devices are connected to the router. In one of the SmallNetBuilder Forums post – “Key Rotation Intervals – 60 minutes, even if a handshake is captured, it becomes a race against time before the keys rotate, and then time to start over.” Therefore, in my opinion, I rather have it set to 3600 than 0 (disabled) so that hackers only have 60 minutes to hack my WiFi password before they start all over again.
Channel bandwidth: 20 vs 40 vs 80 MHz
If you research enough articles online, it is always mentioned to remain 20 MHz only for 2.4 GHz. Although 40 MHz double the bandwidth, it will overlap other channels, causing a decrease in performance. A few articles will also mention that the best channels to use for 20 MHz are Channel 1, 6, 11 and 40 MHz are Channel 3, 11, but I will consider the auto function so that our router can auto-adjust for the best channel to use. Using 20 MHz on a 5 GHz radio is akin to an old legacy driver placed in a fast technology car; hence 40 MHz and 80 MHz are best used in the 5 GHz frequency band as there are significantly more Wi-Fi channels in the 5 GHz frequency band to deal with overlapping. If the router is configured in “40MHZ only”, then a 20MHZ client cannot connect.
- 2.4 GHz – I picked 20/40 MHz because there are 4 – 8 SSIDs depending on which room I am in. For example, I scanned 8 SSIDs (congested) in my master bedroom but only 4 SSIDs (uncrowded) in the living room. I hope that the router will switch my old 2.4 GHz devices to 40 MHz providing greater bandwidth when I am in a less crowded area.
- 5 GHz – I picked 40 MHz because 20 MHz is not ideal, and there is no 40/80 MHz option. If I had chosen the higher 80 MHz, then there is a chance that some of my older 5 GHz devices might not support 80 MHz. I am not gaming over Wi-Fi, so I thought 40 MHz is more than sufficient to do causal web surfing and work on mobile and laptops.
Smart Connect
I struggled to make an ON or OFF decision for smart connect to the point that I had to WhatsApp my friend to ask if he enabled this feature on his Asus router. There are half as many people on the Internet who wrote that smart connect is useless, and the other half who mentioned they used it without any issues. I activated it for an initial one month and copied the rules from snbforums.com because the default settings did not work well (always disconnect) when I am not in direct view and separated by walls to the router.
snbforums post link by member JDB
While gathering information to write this article, I decided to OFF smart connect to see any performance difference. Well, it has been almost a week, and I have no issues so far with my mobile device or my wife laptop while working from home. One of the reasons that made me disable is that I thought to use Roaming assistant under Wireless – Professional, which is more straightforward and less complicated.
Router Wireless – Professional
This section is catered for tech-savvy people who are not your average Joe. Tinkering with options here might improve router performance but may also make it worse than the default settings. It is alright if you disagree with my preferred settings and explanations for my house environment. It is never easy to conclude 1 set of the best configuration for all scenarios.
Tuning The Asus Wireless Router To Best Performance
Useful.
——————————————————————————————————————
I’ve been really enjoying Asus wireless router at home for years, which I believe is the best home wireless router in the world.
The reason why I’m saying best is because of the following consideration as a home wireless router
- Coverage
- Performance
- Features
- Compatibility
- Third party firmware support, like Tomato and DD-WRT
The last Asus wireless router I was using was RT-N16 which is one of the classic router from Asus, it served my home for 2 years without any issues. However, by moving into a bigger house and all of my devices now supporting dual-band network, it seems that I have to buy a new router.
The consideration of the new router will still be the above, especially for the best signal coverage as I don’t want to extend my network by using any WIFI extender and slow down my network.
Lucky, the new Asus RT-AC87U can meet all of my requirements, the only AC2400 4×4 MIMO wireless router in the world with 465m2 coverage premised. More review can be found here, the longest effective range so far.
In case some people need to understand a few performance parameters:
AC2400: the WIFI network speed can reach to 2.4Gb with 600Mbps (Max speed of 2.4GHz network) plus 1734Mbps (5GHz network)
4×4 MIMO: best router capacity, read here
With the best hardware (home router), our next step is to tweak the router to best match our environment since every family may have their own needs.
So the first thing we need to think about is the firmware loaded on the router.
Since Asus router supported various types of firmware, and they all have pros and cons, you can consider by my below matrix
| Firmware | RT-AC87U Supported | HW Acceleration | VLAN | Guest Network | VPN | QoS | Per IP Traffic Monitoring | Save History to USB | Static DHCP Nickname | Firmware Quality |
| Asus Original | Yes | Yes | No | Yes | Yes | Yes | No | No | No | Stable |
| Asuswrt-Merlin | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Stable |
| Tomato | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Less Stable | |
| DD-WRT | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Less Stable |
I also struggling a long time to decide since all of the features are critical for me, especially for a home network with a lab. Although both Tomato and DD-WRT still haven’t support the latest RT-AC87U yet, but I can still flash to it, just lacking the new feature support I believe.
However, the Hardware Acceleration can boost your router a lot, especially for NAT, the internet speed once you have a large number of devices, I don’t want to miss these important feature, so finally I decided to go with Asuswrt-Merlin, which is the one just right build on the original firmware with more customized features. Once Tomato and DD-WRT starting support HW Acceleration, I may switch to them.
To be more clear on the Hardware Acceleration on both Asus original and Asuswrt-Merlin firmware, please refer to below table
- CTF(Cut Through Forwarding): Software optimization technique to accelerate NAT
- FA (Flow Accelerator): Hardware NAT acceleration mechanism design for accelerating wired DHCP and Static IP connections
Level 1=CTF Only
| Category | Feature | Menu | Support HW Acceleration Level |
| QoS | Traditional | Adaptive Qos->QoS | Off |
| QoS | Adaptive | Adaptive QoS->QoS | Level 1 |
| LAN | Spanning-Tree Protocol | LAN->Switch Control | Level 1 |
| None of Above | Level 2 |
| Category | Feature | Menu | Support HW Acceleration Level |
| QoS | Traditional | Adaptive Qos->QoS | Off |
| Traffic Monitor | IP Traffic Monitoring | Tools->Other Settings | Off |
| QoS | Adaptive | Adaptive QoS->QoS | Level 1 |
| None of Above | Level 2 |
OK, now we are clearly enough on the Hardware Acceleration, let’s start tunning the settings
I will ignore a few basic settings since everybody should knows that 
, will only focus on the advanced settings
Less security protocol, just turn it off
4. LAN->Switch Control
| Option | Description | Recommendation |
| NAT Acceleration | HW Acceleration | Auto |
| Enable Jumbo Frame | More compatibility, less performance | Disable (Only enable when you know what you are doing) |
| Spanning-Tree Protocol | Turn off if no switch under router | Disable |
If you would like to flash the router to Tomato, you can refer to my post earlier here