MikroTik

ansky

Plus in Mikrotik parlance, does number of chains = number of antennae = spatial streams? This is true : number of chains = number of antennae However, it does not mean that it equals the number of spatial streams. With Nstreme you can setup full duplex communications where one antenna sends and one...

ansky

If there is interference, wider channel may decrease throughput. WiFi is CSMA/CA, it means it will stop transmitting if it detects another transmission at just 3 dB above the noise floor. If the noise floor is at -100 dBm and you get a signal from your neighbor at -97 dBm, your equipment will stop t...

ansky

That was really bad on the eyes. I reordered it in a table. | Position | Ant. 1 | Ant. 2 | Ant. 3 | |------------|--------|--------|--------|--------|--------|--------| | | Sig. | Thr. | Sig. | Thr. | Sig. | Thr. | | 1 | -66 | 398 | -67 | 502 | -65 | 320 | | 2 | -66 | 498 | -67 | 503 | -72 | 344 | |...

ansky

if unidirectional goes 100-140mbit, then even with 10-15mbit uplink (if ever) the downlink should still go above 50. it's plenty enough. It might ... the thing is that it's not only raw speed, it's timing which plays huge role in bidirectional communication (any TCP connection is bidirectional). An...

ansky

Hello, We are using CRS318-16P-2S+ mikrotik device and I am facing looped packet issues in the device on ether3 and ether5. I have crossed check my STP configurations in the network devices connected to it but all seems fine from there. Kindly do provide assistance as it's been quite a long since I...

ansky

30KM, urban, with a lot of noise , -70dBm signal levels and you want "no more than 300mbit"? get real. maybe with 34dBi dishes and high power radios you might get something close to 200mbit. Yup, 300 Mbits at -70 dBm is total fantasy. I shouldn't have wasted time replying, especially give...

ansky

This smells like smoke escaped from WiFi output power amplifier.

Maybe he should try putting it back in. Will any smoke do?

ansky

802.11 uses CSMA/CA, which means that if a transmission is detected just 3 dB above the noise floor, your equipment will stop transmitting. Unfortunately, MikroTik does not allow us to disable this feature, despite one of their main selling points being that they let us do whatever we want with our ...

ansky

https://www.boredpanda.com/blog/wp-content/uploads/2021/07/1-60ebe3b6965e0__700.jpg In my opinion, I'd prefer less plastic, as a smaller antenna is easier on the eyes. Although I expect the rightmost antenna to perform the best, there might have been an engineering oversight. It's likely they desig...

ansky

I must admit, that does make sense. In practice, the amount of sense it makes is vanishingly small, since AP can't route packets anywhere but back to the bridge anyway. But this is in the spirit of theoretical advice of removing variables that could affect the results of experiments, yes. Routing p...

ansky

It's not always the size, for example the Antenna on the left is the best!

How did you determine that it's the best?

ansky

>Remove the DHCP client

Is it okay to have this on the bridge - mainly so you can see what IP the access point/switch is using?

I think it's better that the AP does not have any IP during troubleshooting, to make sure it's not doing routing and that it's behaving as a simple switch.

ansky

The size of the antenna (not the plastic) matters. The bigger it is, the more directive it is. It allows you to focus the power in one direction/plane better. This effect works both for transmission and for reception in equal measure. For every doubling of distance, there is a loss of 6 dB of power....

ansky

/interface wifi set [ find default-name=wifi1 ] channel.band=5ghz-ax .frequency=5180,5240,5745 .width=20/40/80mhz configuration.country="United States" .mode=ap .ssid=House5GHz dis abled=no name=House5GHz security=WifiSec Please do a simple test, use only 20 MHz width on 5 GHz, set freque...

ansky

/interface wifi set [ find default-name=wifi1 ] channel.band=5ghz-ax .frequency=5180,5240,5745 .width=20/40/80mhz configuration.country="United States" .mode=ap .ssid=House5GHz dis abled=no name=House5GHz security=WifiSec Please do a simple test, use only 20 MHz width on 5 GHz, set freque...

ansky

How do you know it's VLAN-less ? Maybe the router is using VLAN 1. Most mikrotik gear will use VLAN 1 if left unconfigured, but will not mark packets as VLAN 1 for WiFi. Because I read the config and there's no mention of VLANs? Sure, the interface on the CRS that's connected to the ax3 could someh...

ansky

If you are using it as an AP, you can bridge the WiFi interface to the LAN interface, so the AP will act as a switch. That is entirely correct. However, that is also already the case, see config =P Maybe you should specify vlan 1 in data path in the WiFi config, or some other vlan depending on what...

ansky

If you are using it as an AP, you can bridge the WiFi interface to the LAN interface, so the AP will act as a switch. Remove the DHCP client and DHCP relay. The AP does not need an IP address and can be managed by WinBox if you are on the same switch. Maybe you should specify vlan 1 in data path in ...

ansky

5 days = 120 hours. 7W/h = 840 W W/h is not a valid unit and is meaningless, although I understand the intent. Energy = Power x Time Power = Energy / Time 1 Watt is the rate of consumption of 1 Joule per second. 1 W = 1 J/s (one Joule per second). Therefore 1 J = 1 Ws (1 Watt applied over 1 second)...

ansky

However keeping AX for both wlan0 and wlan1 physical interfaces prevents setting N for any of them.

Try not setting AX nor N. Leave the band setting empty. It should default to AX with compatibility for N.

ansky

I have bought a NetMetal ax to build an outdoor WiFi AP intended to cover a large area. I also bought these two 2.4/5GHz omni antennas and five-meter cables to connect them to the AP with: https://alfa-network.eu/antennas/wi-fi-antennas/aoa-2458-59-tfl Only now that I already have all this stuff I ...

ansky

Terrible news. It was a nice looking structure.
Why did it start burning? Did you find out?

ansky

That's not how it is supposed to work, channel slicing (also called Punctured Transmission) is meant to resolve this problem. Unlike all previous wifi generations it will slice out interfering segments https://www.ruckusnetworks.com/blog/2023/wi-fi-7-and-punctured-transmission/#:~:text=In%20a%20nut...

ansky

So the big thing about Wifi7 is something in cell networks exists for the last almost 15 years: Carrier Aggregation. Yay! I can't wait until my neighbor sets up his WiFi 7 AP that uses 40 MHz on 2.4 GHz, 160 MHz on 5 GHz and 320 MHz on 6 GHz, all at the same time, all bands being used together (MLO...

ansky

Think about how much better cell phones work compared to wifi.

LTE will work down to about -115 dBm RSSI and with a -10 dB of SNR.
While WiFi requires a minimum of 10 dB SNR to maintain a connection.
That's a 20 dB difference, or about 10 times the range.

ansky

In my home, on 5 GHz I tested 20 MHz bandwidth instead of 80 MHz for one week and, unless transferring big files, I couldn't notice a performance difference. I noticed slightly better stability at the far end of the WiFi range, a bit better roaming and less battery usage on mobile devices. I had no ...

ansky

I did another experiment today. I borrowed another AP: TP-Link TL-WR802N and tried the same things. Just plain lies. TP-Link works much better. This is so infuriating. There's no way you configured both the same and obtained different results. Any ideas? Yes, you got plenty of advice. Read past pos...

ansky

Now paint the antennas black or the same color as the wood.

ansky

There are commercial and freeware tools for Windows (a few also 10/11 compatible) that allow to change among different network profiles (i.e. also IP address and netmask). Adding many IP addresses is a nice idea :) , but there is a risk of possible collisions, two customers with the same network 19...

ansky

You connect your computer to the customer's network and you discover that there is no DHCP server. Now you must assign an IP address manually but if you take one that's already assigned, you'll cause a conflict and take down the other computer, which may be critical, resulting in disaster. You can't...

ansky

can the wireless get connection with the laptop with the wi-fi interface without an IP and without assigning one to the laptop? Yes. WiFi works mostly at L1 and L2. The only time it processes L3 is if you use IGMP snooping, and even then I'm not sure if it's done by the interface or the CPU. you co...

ansky

Maybe the place has rogue AP neutralization equipment. Ruckus allows one to attack rogue APs by sending deauth packets to their clients. Maybe the other network is using the same segment as yours and you have an IP conflict somewhere. Maybe there is a lot of broadcast on that network (broadcast and ...

ansky

Not only that, but the new capsman is not compatible with the older one. So if you have older devices and you buy a new one, you are SOL.

ansky

Really -- -90 to -74 dBm is a HUGE difference. Maybe the Unifi is emitting more than what is legally allowed, like VW diesels. Btw I noticed that on my hAP ax³ frequency matters. On channel 36 (20 MHz width) I was measuring -70 dBm at a device. Switched frequency to channel 60 (20 MHz width) and I ...

ansky

After just a few lines, I knew this was AI generated as it made no sense.

Maybe you should ask your AI for advice as well.

ansky

If you did not lower your TX power to 0 dBm, you are emitting at 60 dBm which is very illegal.

ansky

The LHG 2 is 18 dBi, the Mant 2 12s is 12 dBi. Since one has to abide by EIRP regulations, the antenna gain works only to increase reception. In other words, the signal from the Mant to the LHG is improved by 18 dB. The signal from the LHG to the Mant is improved by 12 dB. We should be seeing differ...

ansky

Then I’m afraid you can’t use that either other than as a pure Linux router module.

That's why I request the feature to be added.

ansky

Mac80211_hwsim is a Linux kernel module designed for 802.11 development ie used by hw/sw developers. It would require highly specialized device drivers for ROS in order to interact with any type of virtual environment. Read this: https://www.gns3.com/community/featured/open-source-alternatives-for-...

ansky

Bump.

ansky

Using channel 36 it is not possible to tune the eC extension as it is the lowest channel in the band, it is forbidden to use frequencies lower than this. Therefore, only Ce can be used on channel 36. Then the points will use channels 36+40 when working in the 40 mHz band. Channel 36 (5180) occupies...

ansky

If you use 9 dBi antennas, you need to set antenna gain to 9 otherwise what you are doing is illegal. If you don't want make a cable run, create a PtP link between the two houses using directional antennas and then use an AP at the other house. Buy two SXTsq Lite5 for the PtP link and configure them...

ansky

On wifi there is no equitable distribution of bandwidth between devices, so surely some devices will get enough bandwidth and others will suffer. For more equitable bandwidth distribution one could use a PCQ queue. Given 50 devices and 3 APs, that's 17 devices per AP. Given 5 MBps per device, that'...

ansky

As you can see, the wider you go, the more throughput you get, but with diminishing returns. Generally, for each doubling in bandwidth, you get a 50% increase in throughput. Not to forget that if transmitters work at EIRP limitation, then each doubling of bandwidth will reduce RSSI by 3dB. I though...

ansky

May I ask you, why do you use same channel on both devices?

Unfortunately I can't answer that.

ansky

Are the devices sending video or receiving video?

ansky

Hmmm.... I was running 20mhz channels because it was all IOT (on 2.4ghz) and figured I did not need the bandwidth, and it might cause less interference (to my neighbors or even my own). But I was having trouble with one device pretty far away from the furthest AP. Out of curiosity I changed to 20/4...

ansky

I have two access points using channel 36 (40 MHz) that overlap each other. Should I set Ce on the first AP and eC on the second, or should I use Ce on both? If I use Ce on the first and eC on the second, their beacons won't interfere. But what about data transmission? Doesn't channel access coordin...

ansky

>> I'm using the Alfa 10 dBi directional https://www.alfa.com.tw/products/apa-m2 ... 1664232520 I'm pretty sure this antenna is the reason for your low and erratic throughput. I tested the antenna with a VNA and I can confirm that it's radiating well. As for directionality, I haven't tested that ex...

ansky

I feel like you'd get 10% more throughput on 5 GHz. From my own testing 802.11ax gives a bit better throughput than 802.11ac in PtP given everything else stays the same.
It certainly is possible to use both 5 GHz and 2.4 GHz at the same time.
If money is not an issue I'd get the mANT30.

ansky

ax200, 201, 210 and 211 cards are regularly downloading + uploading over 700Mbit/s from AX3 on Windows 10/11 from internet, not on local network with iptraf tests (=that must be more. Even shitty Realtek AX wifi cards can do that. I suspect those linux drivers and/or plethora of configuration optio...

ansky

When testing with iperf3: don't forget to test with "-R" flag too. This way the iperf3 server sends data to the client, meaning you are benchmarking AP download speed to client. without -R flag you measure the client UPLOAD performance, which is wayyyyyy limited by client device antenna/d...

ansky

Good news, the laptop fell from 2 meters and got completely destroyed. Got myself a new Vivobook TP3402, on which I installed linux mint. Now it's using an intel wifi adapter with iwlwifi driver. I did some speed tests in different configurations. All speed tests performed using iperf3 in TCP mode t...

ansky

I’m close to put back my old Unifi APs and sell the MikroTik ones, but I’m hoping this forum can help me fixing it. 🙏 I can offer you $100 for both units, considering they are used, old, no WiFI 6, obsolete and one can find them on ebay quite cheap: https://www.ebay.co.uk/itm/126400295845 The price...

ansky

Please add mac80211_hwsim support so that we can simulate WiFi interfaces in virtual environments, like GNS3.
Please add the option to create virtual WiFi interfaces in the UI.

ansky

Right now, if interference is detected slightly above the noise floor (around 2 or 3 dB), the router waits for the interference to stop before transmitting. This is part of the CCA process to avoid collisions. However, I would like the option to change this threshold. For example, setting it to 10 d...

ansky

Everyone is affected. But, the vulnerability requires that the attacker knows the PSK (pre-shared key). The solution? Use enterprise authentication with certificate verification. When everyone starts using enterprise authentication with certificate authentication, some idiot will say, "Aha! But...

ansky

This is a layer 4 problem. TCP and UDP do not support that out of the box. You could try using SCTP, which will give you redundancy. Or maybe try MPTCP, which is supposed to aggregate the bandwidth of multiple links, although I never used it. Maybe you could try establishing EoIP links and then bond...

ansky

I have not seen other reports of similar issues with USB port of the Mikrotik Ax3, maybe you were just (very) unlucky?
Or you suspect that your particular device has a defect?

How to tell? It's still under warranty but I need some solid proof and testing is expensive.

ansky

I wanted to log stuff to a USB dongle, so I tried a cheap 8 GB stick and after a while it got ruined, won't work anymore even in other computers. Then I tried another cheap 8 GB stick of another brand, same story. Then I tried my expensive 128 GB transcend memory (https://www.transcend-info.com/prod...

ansky

I conducted some RSSI measurements with the antennas I have. The Yagi antenna has already been discarded. Distance: 1.2 meters between the Access Point (AP) and the phone, with a clear line of sight. The biggest antenna is 0.16 meters so we are well further than the calculated far field of 1 meter (...

ansky

Thanks for replies, Well, actually an hotspot is managing about 300 wifi users on 50mt coverage radius, over two old asus rt ac1200 wifi router (how bad ? they seems don't care about...) They asked me for replacing Asus with AX devices: since customer is more worried by cost rather than performance...

ansky

I just got the Nano VNA SAA v2 and started testing all the antennas I had. First in line, the Asus one, the one that comes with the PCE-AX58BT. Shines the brightest on channel 11. VSWR: asus_vswr.png Log Mag: asus_log_mag.png Impedance: asus_impedance.png Next, the Alfa 10 dBi panel , a beacon of ho...

ansky

P.S.: Check this: https://forums.linuxmint.com/viewtopic.php?t=394684 That did it. Using driver rtl8821ce instead of rtw88_8821ce. I got 186 Mbps download and 67 Mbps upload. Still not the 300 Mbps that my other devices are getting but it's acceptable. Why the problem presents itself only with Mikr...

ansky

Here is some more information if it helps debug the issue: OS: Devuan GNU/Linux 4 (chimaera) x86_64 Host: VivoBook_ASUSLaptop TP401MAR_TP401MA 1.0 Kernel: 5.10.0-27-amd64 CPU: Intel Celeron N4020 (2) @ 2.800GHz GPU: Intel GeminiLake [UHD Graphics 600] It's using in kernel driver rtw88_8821ce. Wifi w...

ansky

WiFi 6, lightweight, touchscreen, works well with linux, very long battery life, and cheap enough that I don't worry of it being stolen or damaged. Sounds like a mid-range Chromebook. Mine manages to push 180 Mbit/sec to the Internet through the ax³ from a few rooms away. It's a 2021 model, so one ...

ansky

One of the reasons I suggested using an /export command instead of /print is that it suppresses sensitive info like your WiFi password by default. I've edited that out of your postings above, but you can't count on us moderators to backstop you like that every single time. Other than local details ...

ansky

More complete: admin@MikroTik] /interface/wifi/actual-configuration> print 0 name="wifi1-5G" l2mtu=1560 mac-address=**ELIDED** arp-timeout=auto radio-mac=**ELIDED** configuration.mode=ap .ssid="**ELIDED**" .country=Switzerland .tx-power=15 security.authentication-types=wpa2-psk,w...

ansky

I repeat: show your configuration. Here's my configuration right now: [admin@MikroTik] /interface/wifi/configuration> print Flags: X - disabled 0 name="cfg1" mode=ap ssid="**ELIDED**" country=Switzerland security.authentication-types=wpa2-psk,wpa3-psk .group-key-update=30m .pass...

ansky

I tried using 2.4 GHz Unlike ax, ac isn't defined for both 2.4 and 5GHz. You would have fallen down to "n" at best. If it fell down to "g" instead, that would explain your speeds. Assuming both radios are using the same SSID, I'd try turning on FT mode on them both, giving the l...

ansky

I have a laptop with a RTL8821CE wifi chip and I'm getting a maximum of 20 Mbps no matter what. Another laptop with an older intel chip gets 300 Mbps. My samsung smartphone gets 300 Mbps. Wired I get the full 1 Gbps. Yesterday I connected my laptop (the RTL8821CE one) to a public hotspot and was get...

ansky

VLAN is a L2 concept, it has nothing to do with layer 3 from the OSI model. Your laptop is on the normal (untagged) broadcast domain But you set your router on the vlan 1 broadcast domain(thus packets are tagged from ether1) The devices are in 2 different broadcast domains(L2) this is why they cann...

ansky

Hello, I just bought a hAP ax3 and I tried configuring a L3 VLAN. I have my laptop connected to port ether1. The laptop's interface is set to 192.168.55.2/24. The ether1 interface on the device does not have any IP configured. I created a L3 VLAN named VLAN1 and added it to ether1. I set the ip addr...

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