Interface wifi2_5ghz(): High error rate (>2 for 5m)

Snooops · Thu Aug 29, 2024 12:11 pm

Hi,

once i have setup zabbix monitoring in my homelab i recognized some error:

Interface wifi2_5ghz(): High error rate (>2 for 5m)

If i look into the Wireless access point i see in the "Traffic" tab at "Tx/Rx Errors" a raising number >200.000.

The device is a RBD53iG-5HacD2HnD (hAP ac³) version 7.11.3
The CapsMan device is a CRS328-24P-4S+ version 6.48.6

The CapsMan is also managing two C53UiG+5HPaxD2HPaxD (hAP ax³) version 7.14.2 which are working flawless.

On the CapsMan i have different configurations:
1. for the AC typed device: RBD53iG-5HacD2HnD (hAP ac³)
2. for the AX typed devices: C53UiG+5HPaxD2HPaxD (hAP ax³)

This is the configuration on the CapsMan device:

 0   name="AC_Supergauss" mode=ap ssid="Supergauss" country=Germany security=Supergauss 
     security.authentication-types=wpa2-psk,wpa3-psk .passphrase="xxx" .ft=yes .ft-over-ds=yes 
     datapath=AC_datapath1 
     datapath.bridge=bridge1 

 1   name="AC_Supergauss_WORK" mode=ap ssid="Supergauss_WORK" country=Germany security=Work 
     security.authentication-types=wpa2-psk,wpa3-psk .passphrase="xxx" .ft=yes .ft-over-ds=yes 
     datapath=AC_datapath1 
     datapath.bridge=bridge1 

 2   name="AC_Supergauss_SMART" mode=ap ssid="Supergauss_SMART" country=Germany security=Smart 
     security.authentication-types=wpa2-psk,wpa3-psk .passphrase="xxx" .ft=no .ft-over-ds=yes .ft-preserve-vlanid=no 
     datapath=AC_datapath1 
     datapath.bridge=bridge1 

 3   name="AC_Supergauss_GUEST" mode=ap ssid="Supergauss_GUEST" country=Germany security=Guest 
     security.authentication-types=wpa2-psk,wpa3-psk .passphrase="xxx" .ft=yes .ft-over-ds=yes 
     datapath=AC_datapath1 
     datapath.bridge=bridge1 

 4   name="AX_Supergauss_GUEST" mode=ap ssid="Supergauss_GUEST" country=Germany security=Guest 
     security.authentication-types=wpa2-psk,wpa3-psk .passphrase="xxx" .ft=yes .ft-over-ds=yes 
     datapath=GUEST 
     datapath.bridge=bridge1 .vlan-id=30 

 5   name="AX_Supergauss_SMART" mode=ap ssid="Supergauss_SMART" country=Germany security=Smart 
     security.authentication-types=wpa2-psk,wpa3-psk .passphrase="xxx" .ft=yes .ft-over-ds=yes 
     datapath=SMART 
     datapath.bridge=bridge1 .vlan-id=20 

 6   name="AX_Supergauss" mode=ap ssid="Supergauss" country=Germany security=Supergauss 
     security.authentication-types=wpa2-psk,wpa3-psk .passphrase="xxx" .ft=yes .ft-over-ds=yes 
     datapath=Supergauss 
     datapath.bridge=bridge1 

 7   name="AX_Supergauss_WORK" mode=ap ssid="Supergauss_WORK" country=Germany security=Work 
     security.authentication-types=wpa2-psk,wpa3-psk .passphrase="xxx" .ft=yes .ft-over-ds=yes 
     datapath=WORK 
     datapath.bridge=bridge1 .vlan-id=10

This is the configuration on the device with the Rx/Tx errors RBD53iG-5HacD2HnD (hAP ac³), i have disabled the provisioning of 5ghz work ssid because i had some trouble with MacOS devices:

Flags: M - MASTER; B - BOUND; R - RUNNING
Columns: NAME, MASTER-INTERFACE, CONFIGURATION.MODE
#     NAME           MASTER-INTERFACE  CONFIGURATION.MODE
;;; managed by CAPsMAN
;;; mode: AP, SSID: Supergauss, channel: 2457/n/eC
0 MBR wifi1_2ghz                       ap                
                                                         
;;; managed by CAPsMAN
;;; mode: AP, SSID: Supergauss_GUEST
1  BR wifi1_2ghz_10  wifi1_2ghz        ap                
                                                         
;;; managed by CAPsMAN
;;; mode: AP, SSID: Supergauss_SMART
2  BR wifi1_2ghz_20  wifi1_2ghz        ap                
                                                         
;;; managed by CAPsMAN
;;; mode: AP, SSID: Supergauss_WORK
3  BR wifi1_2ghz_30  wifi1_2ghz        ap                
                                                         
;;; managed by CAPsMAN
;;; mode: AP, SSID: Supergauss, channel: 5640/ac/eeeC
4 MBR wifi2_5ghz                       ap                
                                                         
;;; managed by CAPsMAN
;;; mode: AP, SSID: Supergauss_SMART
5  BR wifi2_5ghz_20  wifi2_5ghz        ap                
                                                         
;;; managed by CAPsMAN
;;; mode: AP, SSID: Supergauss_GUEST
6  BR wifi2_5ghz_30  wifi2_5ghz        ap

Snooops · Thu Aug 29, 2024 12:30 pm

Oh wait - could it be because the CapsMan device CRS328-24P-4S+ version 6.48.6 didn't bootet the v7 firmware? I had a power outage yesterday, maybe that is related to that. I gonna check it and share the results.

Snooops · Thu Aug 29, 2024 2:09 pm

I updated all devices to 7.15.1
The problem still exists. And after some reboots caused by the firmware upgrade, the interface which is causing the trouble is now the 2ghz interface instead of the 5 ghz interface. Could it be caused by a client?

itimo01 · Thu Aug 29, 2024 4:24 pm

I'm guessing you're running wifi-qcom-ac on the hap ac?

According to the 7.16rc release, there's a bug in the previous versions counting "tx-drops" as "tx-errors"

*) wifi-qcom-ac - count dropped packets to "tx-drop" instead of "tx-error";

EDIT:

P.s. RouterOSv6 has no support for the "wifi"/"wifiwave2" capsman

Snooops · Fri Aug 30, 2024 10:26 am

hmm interesting,
so even if it would be drops. What cause that high drops on a wifi interface, poor connection?

itimo01 · Fri Aug 30, 2024 11:24 am

Could be anything from poor connection to interference including high noise (low SNR)

You can check if its TX or RX Drops (or errors) on the Router.

If you're interested in the noise, RouterOS 7.16rc now has a spectral-scan and spectral-history command for AX devices.

Snooops · Fri Aug 30, 2024 12:36 pm

I'm going to wait for the 7.16 stable release and look for it. Besides of that stats i don't see any disturbance in the wifi service in the clients at all. So this error is for me more like a information severity

Snooops · Mon Sep 02, 2024 3:05 pm

Btw. is that normal the multiple VLAN definitions for the same VLANs?

The ones with comments are created by me upfront, during the bootstrapping of the switch.

Bildschirmfoto vom 2024-09-02 14-03-32.png

Snooops · Tue Sep 03, 2024 9:30 am

It is not related to a wifi client. If i swap this device with the position of one of my hAP ax³ it still produces high Tx Drops. I have the feeling this is somehow related either to CAPsMAN or a bug?

itimo01 · Tue Sep 03, 2024 10:09 pm

Btw. is that normal the multiple VLAN definitions for the same VLANs?

The ones with comments are created by me upfront, during the bootstrapping of the switch.
Bildschirmfoto vom 2024-09-02 14-03-32.png

Yes,this is normal because dynamic rules are separate from static ones (created by the admin)

It is not related to a wifi client. If i swap this device with the position of one of my hAP ax³ it still produces high Tx Drops. I have the feeling this is somehow related either to CAPsMAN or a bug?

So if i understand this correctly, you swapped the ac3 with the ax3?
How would this exclude any Wi-Fi clients? I mean, you still have the same clients connecting to the AP.

I do not see how this would be related to Capsman cause all capsman does (especially with wifi-qcom-ac drivers) is take over the configuration of the Wi-Fi interface.

Maybe you can do a frequency scan and see if the channels you are using are having a high NF or high activity and maybe switch to a better channel in that location.

If it's just on the 2.4Ghz interface, it could also be caused by plenty of other devices.
For example (but not limited to): Anything Bluetooth, Microwave Ovens, RF Remotes for setup boxes/tvs/etc, Wireless Keyboards or Mouse, Remote controlled sockets, some non-dect wireless phones.

Or just simply overload on the channel. If you run 2.4Ghz, i'd recommend 20mhz channel width.

Snooops · Wed Sep 04, 2024 11:19 am

Ok, i tried a configuration without CAPSMAN and then i had no TX Drops (i applied the 7.16.x rc firmware on the AC device).

I only have those TX Drops/errors on the AC device, not at the AX devices. So it is not related to clients that means to me that the problem is related to the AC driver or device or the CAPSMAN implementation for AC devices and not on the clients. If it would be a client issue, i would see same drops/errors on AX devices, right?

Interface wifi2_5ghz(): High error rate (>2 for 5m)

Interface wifi2_5ghz(): High error rate (>2 for 5m)

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Re: Interface wifi2_5ghz(): High error rate (>2 for 5m)

Re: Interface wifi2_5ghz(): High error rate (>2 for 5m)

Re: Interface wifi2_5ghz(): High error rate (>2 for 5m)

Re: Interface wifi2_5ghz(): High error rate (>2 for 5m)

Re: Interface wifi2_5ghz(): High error rate (>2 for 5m)

Re: Interface wifi2_5ghz(): High error rate (>2 for 5m)

Re: Interface wifi2_5ghz(): High error rate (>2 for 5m)

Re: Interface wifi2_5ghz(): High error rate (>2 for 5m)

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