[FS#3321] wireless phy, capable of bands g and a but set as AP to band g (2.4 GHz) still doing radar scan

OpenWrt Bugs openwrt-bugs at lists.openwrt.org
Sat Sep 5 11:20:18 EDT 2020


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A new Flyspray task has been opened.  Details are below. 

User who did this - william wortel (wwortel) 

Attached to Project - OpenWrt/LEDE Project
Summary - wireless phy, capable of bands g and a but set as AP to band g (2.4 GHz) still doing radar scan
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - OpenWrt SNAPSHOT, r14382+7-ad0f0df909
Ubiquiti Routerstation ar71xx with 3 pcs. PCIe 2.4/5 GHz radio
wlan0 set AP 5 GHz
wlan1,2 set as AP 2.4 GHz

from dmesg:
daemon.notice hostapd: wlan2: DFS-CAC-COMPLETED success=1 freq=5640 ht_enabled=1 chan_offset=-1 chan_width=2 cf1=5630 cf2=0
daemon.warn hostapd: current_mode != IEEE80211A
daemon.notice hostapd: wlan1: DFS-CAC-COMPLETED success=1 freq=5640 ht_enabled=1 chan_offset=-1 chan_width=2 cf1=5630 cf2=0
daemon.warn hostapd: current_mode != IEEE80211A

When set to 2.4 GHz band no radar scan on 5 GHz band should be done but apparently it is being done. As the radio circuit cannot do G and A band service at the same time
this interferes with continuous service in the 80211 G band.
No idea where this 5630 GHz frequency stems from that the log shows. wlan1 is set to channel 12 and wlan2 to channel 1. Being AP they are not supposed to scan, let alone on 5 GHz.
iwinfo:
wlan0     ESSID: "some a"
          Access Point: 00:0C:42:xxxxxx
          Mode: Master  Channel: 128 (5.640 GHz)
          Tx-Power: 18 dBm  Link Quality: 70/70
          Signal: -29 dBm  Noise: -95 dBm
          Bit Rate: 81.0 MBit/s
          Encryption: WPA PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11abgn
          Hardware: 168C:0029 168C:4204 [Generic MAC80211]
          TX power offset: unknown
          Frequency offset: unknown
          Supports VAPs: yes  PHY name: phy0

wlan1     ESSID: "some b"
          Access Point: 00:1B:B1:xxxxxx
          Mode: Master  Channel: 12 (2.467 GHz)
          Tx-Power: 18 dBm  Link Quality: unknown/70
          Signal: unknown  Noise: -95 dBm
          Bit Rate: unknown
          Encryption: WPA PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11abgn
          Hardware: 168C:0029 168C:2096 [Generic MAC80211]
          TX power offset: unknown
          Frequency offset: unknown
          Supports VAPs: yes  PHY name: phy1

wlan2     ESSID: "some c"
          Access Point: 00:0C:42:xxxxxx
          Mode: Master  Channel: 1 (2.412 GHz)
          Tx-Power: 16 dBm  Link Quality: unknown/70
          Signal: unknown  Noise: -95 dBm
          Bit Rate: unknown
          Encryption: WPA PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11abgn
          Hardware: 168C:0029 168C:4204 [Generic MAC80211]
          TX power offset: unknown
          Frequency offset: unknown
          Supports VAPs: yes  PHY name: phy2


More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3321

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