Trying to understand slow WiFi speeds - GT-AX6000 with 3 AX92U nodes

[pgershon]

I recently set up a new GT-AX6000 as a base router and converted one of my AX92U units from router to node. Previously I had run with an AX92U as router and two AX92U nodes. The two nodes (that had been nodes before) and the main GT-AX6000 seems to work and give me high speeds (over 800 Mbps up and down on fiber) when connected to wired or wireless devices (iPhone 14 pro, MacBook Air 2022). But on the device that was converted from router to node, the wireless speeds do not exceed 150 Mbps, while the wired speeds are over 800 Mbps. I tested with multiple devices and this is very repeatable.

All nodes are wired to the main router. The new node is wired with 2.5 gig MOCA adaptor, while the other use Cat 5e. I dont think the MOCA is the problem, however, because devices reach proper speed when connected to wired port on the 92U. Connections are slower if I disconnect the router entirely, so I doubt it's an issue of two routers too close together. To my knowledge, wireless settings are the same on all three 92U nodes (I dont know how I might change that). Any ideas what might be going on or things I should check? Happy to provide more detail.

 

[pgershon]

Adding some screenshots of setting, which are pretty much the same for all three nodes.

 

[pgershon]

One more note. I changed the unit causing slowness issues to AP mode (from Mesh node). Used same SSID as the rest of the house. Issue remained on downloads only (so I had slow downloads but fast uploads using speedtest, in the magnitude of 150/700). Then I changed the SSID of the 5gHz-2 band to something unique. Wifi with the directed 5gHz-2 was at full speed, but WiFi using the 5gHz-1 (on same SSID as rest of house) was slow.

Update: download speed is better significantly, but still slower than uploads at that router /AP)

I have no idea what the problem is - I am guessing interference on the 5gHz-1 band affects downloads (but I have no idea why uploads are fast). This behavior was repeated several time on different devices so I doubt its artifact.

 

[pgershon]

I realize I am responding to my own posts, but I just changed modulation scheme (on the wireless/professional tab of the GT-AX6000) to MCS 11 nitroQAM 1024QAM. That seems to have sped up the WiFi 6 to proper speeds.

 

[pgershon]

Today many of my users experienced slower wifi speeds and drops on their video calls. I changed the setting of OFDMA/802.11ax MU-MIMO to DL/UL OFDMA+MU-MIMO. And set MIMO to disable. That restored speeds on Wifi 6 clients. I have no idea what I actually did, but none of my WiFI 6 devices were getting speed over 120 before this change. Any ideas what is happening?

Also some weird log entries this AM:

Jun 28 06:07:54 kernel: MACSEC: macsec is not enabled
Jun 28 06:07:56 kernel: eth0 (Int switch port: 5) (Logical Port: 5) (phyId: 11) Link Up at 1000 mbps full duplex
Jun 28 06:07:59 kernel: ^[[0;33;41mFCACHE ERROR: fc_config_mcast_group: Mcast: client has already JOINed the mcast group (duplicate JOIN)^[[0m
Jun 28 06:07:59 kernel: Mcast: new client info: group_addr<229.255.255.250> src_addr<0.0.0.0> is_ssm<0> tx_dev_p<ffffffc0293e5000> wlinfo<0000> client_type<0> MAC<00:22:6c:0e:b0:bc> rtp_seq_chk<0>
Jun 28 06:07:59 kernel: rtp_seq_chk<0> mcast_excl_udp_port<0>
Jun 28 06:07:59 kernel: Mcast: new client: matches with: mcast_group<3> client_id<1>
Jun 28 06:07:59 kernel: ^[[0;33;41m[ERROR mcast] bcm_mcast_clientinfo_node_add,843: blog_activate failure^[[0m
Jun 28 06:07:59 kernel: ^[[0;33;41m[ERROR mcast] bcm_mcast_fc_flow_add,924: Error adding client info node^[[0m
Jun 28 06:07:59 kernel: is_ssm 0 grp 229.255.255.250 src 0.0.0.0
Jun 28 06:07:59 kernel: mcast_exclude_udp_port 0x0 rtp seq check 0
Jun 28 06:07:59 kernel: ***Client List***
Jun 28 06:07:59 kernel: to_accel_dev eth4 wl info 0x0 clientmac 00:22:6c:14:af:80
Jun 28 06:07:59 kernel: ***Rx Info list***
Jun 28 06:07:59 kernel: rxinfo blog_p 0xffffffc01fc0fa40
Jun 28 06:07:59 kernel: to_accel_dev eth1 wl info 0x0 clientmac 00:22:6c:29:8b:a3
Jun 28 06:07:59 kernel: ***Rx Info list***
Jun 28 06:07:59 kernel: rxinfo blog_p 0xffffffc01e336540
Jun 28 06:07:59 kernel: ^[[0;33;41m[ERROR mcast] bcm_mcast_blogrule_vlan_process,319: Unable to create flow, continue^[[0m
Jun 28 06:07:59 WAN_Connection: WAN(0) link up.
Jun 28 06:07:59 rc_service: wanduck 1480:notify_rc restart_wan_if 0
Jun 28 06:07:59 custom_script: Running /jffs/scripts/service-event (args: restart wan_if)
Jun 28 06:07:59 kernel: CPU: 1 PID: 622 Comm: dnsmasq Tainted: P O 4.19.183 #1
Jun 28 06:07:59 kernel: Hardware name: GTAX6000_50991 (DT)
Jun 28 06:07:59 kernel: pstate: 00870010 (nzcv q A32 LE aif)
Jun 28 06:07:59 kernel: pc : 00000000f7dfa3a4
Jun 28 06:07:59 kernel: lr : 00000000ffea0740
Jun 28 06:07:59 kernel: sp : 00000000ffea0740
Jun 28 06:07:59 kernel: x12: 0000000000000000
Jun 28 06:07:59 kernel: x11: 00000000ffea09d0 x10: 00000000f7ef0de0
Jun 28 06:07:59 wsdd2[7105]: error: wsdd-mcast-v4: wsd_send_soap_msg: send
Jun 28 06:07:59 kernel: x9 : 0000000000000002 x8 : 0000000000000001
Jun 28 06:07:59 kernel: x7 : 00000000000000af x6 : 00000000ffea0980
Jun 28 06:07:59 kernel: x5 : 00000000ffea0980 x4 : 0000000000000006
Jun 28 06:07:59 kernel: x3 : 0000000000000008 x2 : 0000000000000000
Jun 28 06:07:59 kernel: x1 : 00000000ffea0740 x0 : 0000000000000000
Jun 28 06:07:59 wan: mac clone: [wan0_hwaddr] == [78:7b:8a:ab:e5:92]
Jun 28 06:08:04 wlceventd: wlceventd_proc_event(494): eth7: Deauth_ind 28:C5:38:3F:B4:4B, status: 0, reason: Disassociated due to inactivity (4), rssi:-80
Jun 28 06:08:13 rc_service: watchdog 2677:notify_rc start_dnsmasq
Jun 28 06:08:13 custom_script: Running /jffs/scripts/service-event (args: start dnsmasq)
Jun 28 06:08:13 custom_config: Appending content of /jffs/configs/dnsmasq.conf.add.
Jun 28 06:08:25 wlceventd: wlceventd_proc_event(494): eth7: Deauth_ind 1C:57C:3F:F0:55, status: 0, reason: Station requesting (re)association is not authenticated with responding station (9), rssi:-80
Jun 28 06:08:25 wlceventd: wlceventd_proc_event(511): eth7: Disassoc 1C:57C:3F:F0:55, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8), rssi:-80
Jun 28 06:08:32 kernel: eth0 (Int switch port: 5) (Logical Port: 5) (phyId: 11) Link DOWN.
Jun 28 06:08:34 cfg_server: after filter, available chanspec(bw2g:3 channel2g:1,2,3,4,5,6,7,8,9,10,11 bw5g:15 channel5g:100,104,108,112,116,120,124,128,132,136,140,144,149,153,157,161,165 bw6g:0 channel6g:0 tribandRe:1 dual5gRe:1)
Jun 28 06:08:34 rc_service: cfg_server 3088:notify_rc update_sta_binding
Jun 28 06:08:34 custom_script: Running /jffs/scripts/service-event (args: update_sta_binding)
Jun 28 06:08:34 kernel: MACSEC: macsec is not enabled
Jun 28 06:08:35 kernel: eth0 (Int switch port: 5) (Logical Port: 5) (phyId: 11) Link Up at 1000 mbps full duplex
Jun 28 06:08:39 WAN_Connection: WAN(0) link up.
Jun 28 06:08:39 rc_service: wanduck 1480:notify_rc restart_wan_if 0
Jun 28 06:08:39 custom_script: Running /jffs/scripts/service-event (args: restart wan_if)
Jun 28 06:08:39 kernel: CPU: 0 PID: 18592 Comm: dnsmasq Tainted: P O 4.19.183 #1
Jun 28 06:08:39 kernel: Hardware name: GTAX6000_50991 (DT)
Jun 28 06:08:39 kernel: pstate: 00070010 (nzcv q A32 LE aif)
Jun 28 06:08:39 kernel: pc : 00000000f7e373a4
Jun 28 06:08:39 kernel: lr : 00000000ffd2f100
Jun 28 06:08:39 kernel: sp : 00000000ffd2f100
Jun 28 06:08:39 kernel: x12: 0000000000000000
Jun 28 06:08:39 kernel: x11: 00000000ffd2f390 x10: 00000000f7f2dde0
Jun 28 06:08:39 kernel: x9 : 0000000000000002 x8 : 0000000000000001
Jun 28 06:08:39 kernel: x7 : 00000000000000af x6 : 00000000ffd2f340
Jun 28 06:08:39 kernel: x5 : 00000000ffd2f340 x4 : 0000000000000006
Jun 28 06:08:39 kernel: x3 : 0000000000000008 x2 : 0000000000000000
Jun 28 06:08:39 kernel: x1 : 00000000ffd2f100 x0 : 0000000000000000
Jun 28 06:08:41 wan: mac clone: [wan0_hwaddr] == [78:7b:8a:ab:e5:92]
Jun 28 06:08:41 wsdd2[7105]: error: wsdd-mcast-v4: wsd_send_soap_msg: send
Jun 28 06:08:42 wan: finish adding multi routes
Jun 28 06:08:42 ddns: WAN IP is empty.(10)
Jun 28 06:08:43 watchdog: start ddns.
Jun 28 06:08:43 rc_service: watchdog 2677:notify_rc start_ddns watchdog
Jun 28 06:08:43 custom_script: Running /jffs/scripts/service-event (args: start ddns)
Jun 28 06:08:43 ddns: WAN IP is empty.(9)
Jun 28 06:08:43 rc_service: watchdog 2677:notify_rc start_dnsmasq
Jun 28 06:08:43 custom_script: Running /jffs/scripts/service-event (args: start dnsmasq)
Jun 28 06:08:43 custom_config: Appending content of /jffs/configs/dnsmasq.conf.add.
Jun 28 06:08:44 WAN_Connection: WAN was restored.
Jun 28 06:08:45 BWDPI: force to flush flowcache entries
Jun 28 06:08:45 kernel: CPU: 2 PID: 19701 Comm: amas_lib Tainted: P O 4.19.183 #1
Jun 28 06:08:45 kernel: Hardware name: GTAX6000_50991 (DT)
Jun 28 06:08:45 kernel: pstate: 200b0010 (nzCv q A32 LE aif)
Jun 28 06:08:45 kernel: pc : 00000000f713d11c
Jun 28 06:08:45 kernel: lr : 00000000f712f204
Jun 28 06:08:45 kernel: udb_core lock_num = 1838
Jun 28 06:08:45 kernel: sp : 00000000f708f000
Jun 28 06:08:45 kernel: x12: 0000000000000025
Jun 28 06:08:45 kernel: x11: 00000000f708f50c x10: 00000000f708f520
Jun 28 06:08:45 kernel: *** ERROR: [udb_shell_mod_exit:667] Udb static = 0, dynamic = 24
Jun 28 06:08:45 kernel: x9 : 0000000000000019 x8 : 00000000f7203748
Jun 28 06:08:45 kernel: x7 : 00000000000005e8 x6 : 0000000000000019
Jun 28 06:08:45 kernel: x5 : 0000000000000019 x4 : 00000000f75851fc
Jun 28 06:08:45 kernel: x3 : 00000000f712f160 x2 : 0000000000000019
Jun 28 06:08:45 kernel: x1 : 00000000f75851fc x0 : 00000000f708f5d0
Jun 28 06:08:45 BWDPI: rollback fc