[23.05.0] 802.11s (mesh) use only 20MHz BW (2.4 GHz)

[csharper2005]

Describe the bug

2.4 GHz 802.11s (mesh) use only 20MHz BW to connect to the corresponding router (even if 40 MHz (HT40, HE40) is configured).

Test cases:

Router 1	Router 2	Band	Release	Affected	Tested-by
Mercusys MR90X v1 MediaTek MT7986 mediatek/filogic	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	2.4 GHz	SNAPSHOT r23566-37ff916af7	Yes, 20 MHz BW	@csharper2005
Mercusys MR90X v1 MediaTek MT7986 mediatek/filogic	TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	2.4 GHz	SNAPSHOT r23566-37ff916af7	Yes, 20 MHz BW	@csharper2005
TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	2.4 GHz	SNAPSHOT r23566-37ff916af7	Yes, 20 MHz BW	@csharper2005
TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	2.4 GHz	23.05.0-rc2 r23228-cd17d8df2a	Yes, 20 MHz BW	@csharper2005
TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	2.4 GHz	23.05-SNAPSHOT r23274-b32a4bc33f	Yes, 20 MHz BW	@csharper2005
Asus OnHub Qualcomm IPQ8064	Netgear Nighthawk X4S R7800 Qualcomm IPQ8065	2.4 GHz	SNAPSHOT r23579-1c56801dd2	Yes, 20 MHz BW	@csharper2005
Dynalink Qualcomm Atheros IPQ8074	Xiaomi AX3200 Mediatek MT7915E MT7622	2.4 GHz		Yes, 20 MHz BW	@xabolcs
Mercusys MR90X v1 MediaTek MT7986 mediatek/filogic	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	5 GHz	SNAPSHOT r23566-37ff916af7	Not affected	@csharper2005
Mercusys MR90X v1 MediaTek MT7986 mediatek/filogic	TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	5 GHz	SNAPSHOT r23566-37ff916af7	Not affected	@csharper2005
TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	5 GHz	SNAPSHOT r23566-37ff916af7	Not affected	@csharper2005
D-Link DIR-860L B1 MediaTek MT76x2E ramips/mt7621	Xiaomi AX3200 Mediatek MT7915E MT7622	5 GHz	23.05-SNAPSHOT r23273-50507f5af3	Not affected	@xabolcs
Dynalink DL-WRX36 Qualcomm Atheros IPQ8074	D-Link DIR-860L B1 MediaTek MT76x2E ramips/mt7621	5 GHz	SNAPSHOT r23566-37ff916af7	Not affected	@xabolcs
TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	2.4 GHz	22.03.5	Not affected	@csharper2005
TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	5 GHz	22.03.5	Not affected	@csharper2005
TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	5 GHz	23.05.0-rc2 r23228-cd17d8df2a	Not affected	@csharper2005
TP-Link EC330-G5u v1 MediaTek MT7615E ramips/mt7621	WiFire S1500.NBN MediaTek MT7602E/MT7612E ramips/mt7621	5 GHz	23.05-SNAPSHOT r23274-b32a4bc33f	Not affected	@csharper2005

OpenWrt version

r23228-cd17d8df2a, r23566-37ff916af7, r23579-1c56801dd2

OpenWrt target/subtarget

mediatek/filogic, ramips/mt7621, ipq806x/chromium, ipq806x/generic

Device

Mercusys MR90X v1, WiFire S1500,NBN, WiFire S1500.NBN, ASUS OnHub, Netgear Nighthawk X4S R7800

Image kind

Official downloaded image

Steps to reproduce

1. Configure 40 MHz BW for 2.4:

	option htmode 'HE40'
	option noscan '1'

2. Make sure that clients connects using 40 MHz BW
3. Configure 802.11s:

config wifi-iface 'wifinet4'
	option device 'radio0'
	option mode 'mesh'
	option encryption 'sae'
	option mesh_id 'xxxx'
	option mesh_fwding '1'
	option mesh_rssi_threshold '0'
	option key '********************'
	option network 'lan'
	option skip_inactivity_poll '1'
	option disassoc_low_ack '0'

Actual behaviour

802.11s connection has 20 MHz BW.

Expected behaviour

802.11s connection has 40 MHz BW for 2.4 band

Additional info

802.11s node is enabled:

# iwinfo phy0-mesh0
phy0-mesh0 ESSID: "xxxx"
          Access Point: xx:xx:xx:xx:xx:xx
          Mode: Mesh Point  Channel: 1 (2.412 GHz)  HT Mode: HT20
          Center Channel 1: 1 2: unknown
          Tx-Power: 27 dBm  Link Quality: 59/70
          Signal: -51 dBm  Noise: -92 dBm
          Bit Rate: 1.0 MBit/s
          Encryption: WPA3 SAE (CCMP)
          Type: nl80211  HW Mode(s): 802.11ax/b/g/n
          Hardware: embedded [MediaTek MT7986]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

# iwinfo phy0-ap0 info
phy0-ap0  ESSID: "xxxx"
          Access Point: xx:xx:xx:xx:xx:xx
          Mode: Master  Channel: 1 (2.412 GHz)  HT Mode: HE20
          Center Channel 1: 1 2: unknown
          Tx-Power: 27 dBm  Link Quality: unknown/70
          Signal: unknown  Noise: -92 dBm
          Bit Rate: unknown
          Encryption: WPA3 SAE (CCMP)
          Type: nl80211  HW Mode(s): 802.11ax/b/g/n
          Hardware: embedded [MediaTek MT7986]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

802.11s node is disabled:

phy0-ap0  ESSID: "xxxx"
          Access Point: xx:xx:xx:xx:xx:xx
          Mode: Master  Channel: 1 (2.412 GHz)  HT Mode: HE40
          Center Channel 1: 3 2: unknown
          Tx-Power: 27 dBm  Link Quality: unknown/70
          Signal: unknown  Noise: -92 dBm
          Bit Rate: unknown
          Encryption: WPA3 SAE (CCMP)
          Type: nl80211  HW Mode(s): 802.11ax/b/g/n
          Hardware: embedded [MediaTek MT7986]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

Corresponding router (TP-Link EC330-G5u v1, ramips/mt7621) is not affected if 802.11s is enabled. HT40 works fine:

# iwinfo phy0-mesh0 info
phy0-mesh0 ESSID: "xxxx"
          Access Point: xx:xx:xx:xx:xx:xx
          Mode: Mesh Point  Channel: 1 (2.412 GHz)  HT Mode: HT20
          Center Channel 1: 1 2: unknown
          Tx-Power: 20 dBm  Link Quality: 66/70
          Signal: -44 dBm  Noise: -84 dBm
          Bit Rate: 288.9 MBit/s
          Encryption: WPA3 SAE (CCMP)
          Type: nl80211  HW Mode(s): 802.11b/g/n
          Hardware: 14C3:7615 7615:14C3 [MediaTek MT7615E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

# iwinfo phy0-ap0 info
phy0-ap0  ESSID: "xxxx"
          Access Point: xx:xx:xx:xx:xx:xx
          Mode: Master  Channel: 1 (2.412 GHz)  HT Mode: HT40
          Center Channel 1: 3 2: unknown
          Tx-Power: 20 dBm  Link Quality: 70/70
          Signal: -32 dBm  Noise: -83 dBm
          Bit Rate: 300.0 MBit/s
          Encryption: WPA3 SAE (CCMP)
          Type: nl80211  HW Mode(s): 802.11b/g/n
          Hardware: 14C3:7615 7615:14C3 [MediaTek MT7615E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

Diffconfig

No response

Terms

• I am reporting an issue for OpenWrt, not an unsupported fork.

[hauke]

Please try a openwrt 23.05 snapshot build, multiple fixes were backported for mt76 after 23.05.0-rc2, see 649d9e3 and a70d030

[csharper2005]

@hauke 649d9e3 and a70d030 were cherry-picked from the main branch. I tried the latest snapshot r23566-37ff916af7 (Sat Jul 15 09:58:38 2023 @downloads.openwrt.org).
Clients can use 40MHz:

Mesh are 20MHz only:

Does it make sense to check the 23.05-snapshot if the issue shows up in the main too?

[csharper2005]

I noticed that 5 GHz mesh is also 20 MHz only. So, the issue is band independent.

[csharper2005]

Some additional cases when 802.11s (mesh) use only 20MHz BW:

• mediatek/filogic (Mercusys MR90X v1, MediaTek MT7986) - ramips/mt7621 (WiFire S1500.NBN, MediaTek MT7602E)
• ramips/mt7621 (TP-Link EC330-G5u v1, MediaTek MT7615E) - ramips/mt7621 (WiFire S1500.NBN, MediaTek MT7602E)

[xabolcs]

I'm unable to reproduce with D-Link DIR-860L B1 (with 22.03.5 and 23.05-SNAPSHOT at r23274-b32a4bc33f) + Xiaomi AX3200 (with 23.05-SNAPSHOT, r23273-50507f5af3,MT7622, MT7915E) on 5 GHz mesh at channel 36.

I know, it's not mediatek/filogic but still mt76. I could change the DIR-860L to Dynalink DL-WRX36 in the 5 GHz mesh with AX3200, if it makes sense. Should I give it a try?

(Offtopic, but trying to reproduce this issue, I got a some MAC error detected errors on the DIR-860L. 🤷

Sat Jul 15 20:14:13 2023 kern.info kernel: [ 2483.547746] mt76x2e 0000:01:00.0: Firmware Version: 0.0.00
Sat Jul 15 20:14:13 2023 kern.info kernel: [ 2483.558778] mt76x2e 0000:01:00.0: Build: 1
Sat Jul 15 20:14:13 2023 kern.info kernel: [ 2483.566991] mt76x2e 0000:01:00.0: Build Time: 201607111443____
Sat Jul 15 20:14:13 2023 kern.info kernel: [ 2483.596554] mt76x2e 0000:01:00.0: Firmware running!
Sat Jul 15 20:14:13 2023 kern.info kernel: [ 2483.608327] ieee80211 phy0: Hardware restart was requested

)

[csharper2005]

I'm unable to reproduce with D-Link DIR-860L B1 (with 22.03.5 and 23.05-SNAPSHOT at r23274-b32a4bc33f) + Xiaomi AX3200 (with 23.05-SNAPSHOT, r23273-50507f5af3,MT7622, MT7915E) on 5 GHz mesh at channel 36.

Thanks for the test! Did you reach the 80 MHz BW 802.11s connection between the routers? In both directions (TX / RX)?

I know, it's not mediatek/filogic but still mt76. I could change the DIR-860L to Dynalink DL-WRX36 in the 5 GHz mesh with AX3200, if it makes sense. Should I give it a try?

Yes, please. Especially 2.4 if it's possible. I have only 20 MHz link even between 2 mt7621 routers.

(Offtopic, but trying to reproduce this issue, I got a some MAC error detected errors on the DIR-860L.

Oh, mt7602? How familiar. :) The possible solution - https://github.com/openwrt/openwrt/blob/main/target/linux/ramips/dts/mt7621_sercomm_s1500.dtsi#L214

[xabolcs]

Did you reach the 80 MHz BW 802.11s connection between the routers?

Sure, without problem.
From DIR-860L point of view:

mesh0     ESSID: "mesh"
          Access Point: XX:XX:XX:XX:XX:XX
          Mode: Mesh Point  Channel: 36 (5.180 GHz)  HT Mode: VHT80
          Center Channel 1: 42 2: unknown
          Tx-Power: 20 dBm  Link Quality: 39/70
          Signal: -71 dBm  Noise: unknown
          Bit Rate: 390.0 MBit/s
          Encryption: WPA3 SAE (CCMP)
          Type: nl80211  HW Mode(s): 802.11ac/n
          Hardware: 14C3:7662 14C3:7662 [MediaTek MT76x2E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

phy1-ap0  ESSID: "ap"
          Access Point: XX:XX:XX:XX:XX:XX
          Mode: Master  Channel: 3 (2.422 GHz)  HT Mode: HT40
          Center Channel 1: 5 2: unknown
          Tx-Power: 10 dBm  Link Quality: 70/70
          Signal: -37 dBm  Noise: unknown
          Bit Rate: 132.7 MBit/s
          Encryption: WPA2 PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11b/g/n
          Hardware: 14C3:7662 14C3:7662 [MediaTek MT76x2E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy1

The same mesh part from AX3200:

mesh0     ESSID: "mesh"
          Access Point: XX:XX:XX:XX:XX:XX
          Mode: Mesh Point  Channel: 36 (5.180 GHz)  HT Mode: VHT80
          Center Channel 1: 42 2: unknown
          Tx-Power: 20 dBm  Link Quality: 38/70
          Signal: -72 dBm  Noise: unknown
          Bit Rate: 117.0 MBit/s
          Encryption: WPA3 SAE (CCMP)
          Type: nl80211  HW Mode(s): 802.11ac/ax/n
          Hardware: 14C3:7915 14C3:7915 [MediaTek MT7915E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: wl1

And here is the link from Dynalink DL-WRX36 (SNAPSHOT, r23566-37ff916af7) - while iperf3-ing:

mesh0     ESSID: "mesh"
          Access Point: DE:AD:BE:EF:XX:XX
          Mode: Mesh Point  Channel: 36 (5.180 GHz)  HT Mode: VHT80
          Center Channel 1: 42 2: unknown
          Tx-Power: 18 dBm  Link Quality: 30/70
          Signal: -80 dBm  Noise: -110 dBm
          Bit Rate: 324.2 MBit/s
          Encryption: WPA3 SAE (CCMP)
          Type: nl80211  HW Mode(s): 802.11ac/ax/n
          Hardware: embedded [Qualcomm Atheros IPQ8074]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

Without stress it reports 6 mbps for iwinfo, also on LuCI. 🙄

From AX3200 point of view:

mesh0     ESSID: "mesh"
          Access Point: XX:XX:XX:XX:XX:XX
          Mode: Mesh Point  Channel: 36 (5.180 GHz)  HT Mode: VHT80
          Center Channel 1: 42 2: unknown
          Tx-Power: 20 dBm  Link Quality: 34/70
          Signal: -76 dBm  Noise: unknown
          Bit Rate: 408.3 MBit/s
          Encryption: WPA3 SAE (CCMP)
          Type: nl80211  HW Mode(s): 802.11ac/ax/n
          Hardware: 14C3:7915 14C3:7915 [MediaTek MT7915E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: wl1

[csharper2005]

@xabolcs thanks again. I added all test results to the issue description. And I tested again. Looks like it affects 2.4 GHz only. 20 MHz on 5 GHz in my previous tests was due to power saving when idle.

[csharper2005]

Please try a openwrt 23.05 snapshot build

23.05-SNAPSHOT r23274-b32a4bc33f. Issue exists with 2.4 band. I added this result to the issue description.

It would be good to test on non-mt76 platforms (e.g. Qualcomm).

[xabolcs]

It would be good to test on non-mt76 platforms (e.g. Qualcomm).

I tried mesh on 2.4 band on the Dynalink, but it didn't came up with 40 Mhz wide (ie. HT40, HE40) band mode:

wpa_supplicant[1864]: Could not select hw_mode and channel. (-3)

Will check the logs from AX3200 too.

[csharper2005]

I tried mesh on 2.4 band on the Dynalink, but it didn't came up with 40 Mhz wide

Got the same error when selecting channel 13. You can try channel 1 or 9.