802.11s can not hold up on Linksys MX4300

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minchinghowrt
DD-WRT Novice


Joined: 17 Sep 2024
Posts: 25

PostPosted: Tue Dec 17, 2024 20:55    Post subject: 802.11s can not hold up on Linksys MX4300 Reply with quote
Hi all,
I'm struggling on getting my 802.11s stable for more than 2 days. I first notice this when I tried FW build from 11/29/2024. I have 3 Linksys MX4300 in the mesh. Less than a dozen devices at my place. I followed https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=337443&highlight=802+11s+mesh to setup wifi routers. I tried to form mesh on wlan0(5G-1) and wlan2(5G-2). I observed same issue. I also tried to enable Gate Announcements and HWMP Rootmode. They don't help. I usually observe one of the follower nodes drops from the mesh and need to reboot the node to recover it. When this happened, I can always connect to my follower node with ethernet cable with manually configured IP and check the web ui. I could not tell why it has difficulty to connect to the primary node. I even tried to turn on and off the wireless interface and it did not help.
The primary node that attaches to the modem is always good. I never need to reboot that one.

Any suggestions what I can do to help on this? What information I can provide to help debugging this?
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lexridge
DD-WRT Guru


Joined: 07 Jun 2006
Posts: 1848
Location: WV, USA

PostPosted: Wed Dec 18, 2024 20:19    Post subject: Reply with quote
I only experienced this issue whenever I added a Netgear R7800 as a second secondary node. I assumed it was just instability with 802.11s on the r7800, since it took quite a few reboots just to get the radio turned on in 802.11s mode.

You might try enabling "Avoid Multi-Hop Path Discovery" and see if that makes any difference. I recently turned on "Announce Connected to Gate" and "Announce Connected to Auth-Server" but cannot see this being logged anywhere. In fact, I can not see anything from the mesh being logged for that matter.

_________________
- Linksys EA8500: I-Gateway, WAP/VAP 5ghz only. Features: WDS-AP, VLANs, Samba, WG, Entware - r59429
- Linksys EA8500: 802.11s Secondary w/VLAN Trunk over 5ghz - r59171
- Linksys MX4300: 802.11s Primary w/VLAN Trunk over 5ghz. 2.4ghz WAP/VAP only - r59171
- Linksys MX4300 (WAP/VAP (7)) Multiple VLANs over single trunk port. Entware/Samba r59451
- Linksys MR7350: WDS Station for extended Ethernet r59451
- Linksys Velop WHW03v1 x2: OpenWRT w/GRETAP tunnel for VLANs on VAPs
- OSes: Fedora 40, 10 RPis (2,3,4,5), 23 ESP8266s: Straight from Amiga to Linux in '95, never having owned a Windows PC.

- Forum member #248
minchinghowrt
DD-WRT Novice


Joined: 17 Sep 2024
Posts: 25

PostPosted: Thu Dec 19, 2024 13:53    Post subject: Reply with quote
lexridge wrote:
I only experienced this issue whenever I added a Netgear R7800 as a second secondary node. I assumed it was just instability with 802.11s on the r7800, since it took quite a few reboots just to get the radio turned on in 802.11s mode.

You might try enabling "Avoid Multi-Hop Path Discovery" and see if that makes any difference. I recently turned on "Announce Connected to Gate" and "Announce Connected to Auth-Server" but cannot see this being logged anywhere. In fact, I can not see anything from the mesh being logged for that matter.


Thank you, @lexridge.
I do agree with you on logs about mesh. I could not see anything useful in the log, which may help to identify the problem.
Actually, I kind of recall this problem when I add 3rd node and upgrade to 11/29 firmware. I will try this. setting and report back here.
minchinghowrt
DD-WRT Novice


Joined: 17 Sep 2024
Posts: 25

PostPosted: Thu Dec 19, 2024 14:16    Post subject: Reply with quote
For some reason, DD-WRT does not take enable on Avoid Multi-Hop Path Discovery. Whenever I clicked on save or reply, it resets back to disable. Maybe I'm missing something here?
lexridge
DD-WRT Guru


Joined: 07 Jun 2006
Posts: 1848
Location: WV, USA

PostPosted: Thu Dec 19, 2024 23:49    Post subject: Reply with quote
Yep, just tried it myself. It looks like the nvram variable is missing:
Code:
# nvram show | grep -i mesh
wlan0_mesh_path_refresh_time=1000
wlan0_mesh_element_ttl=31
size: 36369 bytes (94703 left)
wlan0_mesh_fwding=1
wlan0_mesh_confirm_timeout=100
wlan0_mesh_holding_timeout=100
wlan0_mesh_hwmp_max_preq_retries=4
wlan0_mesh_plink_timeout=0
wlan0_mesh_connected_to_gate=1
wlan0_mesh_awake_window=10
wlan0_mesh_rssi_threshold=0
wlan0_mesh_ttl=31
wlan0_mesh_hwmp_active_path_timeout=5000
wlan0_mesh_min_discovery_timeout=100
wlan0_mode=mesh
wlan0_mesh_gate_announcements=1
wlan0_mesh_max_peer_links=255
wlan0_mesh_hwmp_net_diameter_traversal_time=50
wlan0_mesh_hwmp_preq_min_interval=10
wlan0_label=5ghz-Mesh
wlan0_mesh_retry_timeout=100
wlan0_mesh_sync_offset_max_neighor=10
wlan0_mesh_max_retries=3
wlan0_mesh_power_mode=active
wlan0_mesh_hwmp_active_path_to_root_timeout=6000
wlan0_mesh_auto_open_plinks=1
wlan0_mesh_hwmp_rann_interval=5000
wlan0_mesh_hwmp_rootmode=3
wlan0_mesh_connected_to_as=1
wlan0_mesh_nolearn=0
wlan0_mesh_hwmp_confirmation_interval=5000

Maybe try manually setting it? Following the conventions of all the other mesh nvram variables associated with the mesh, this may be a way to manually set it:
Code:
nvram set wlan0_mesh_avoid_multi_hop_path_discovery=1 ; nvram commit ; reboot

Be sure to take a backup before trying this, just in case.

EDIT: Just tried this myself. It does not turn on the option in the WebUI once set manually and rebooted so this probably is not correct.

_________________
- Linksys EA8500: I-Gateway, WAP/VAP 5ghz only. Features: WDS-AP, VLANs, Samba, WG, Entware - r59429
- Linksys EA8500: 802.11s Secondary w/VLAN Trunk over 5ghz - r59171
- Linksys MX4300: 802.11s Primary w/VLAN Trunk over 5ghz. 2.4ghz WAP/VAP only - r59171
- Linksys MX4300 (WAP/VAP (7)) Multiple VLANs over single trunk port. Entware/Samba r59451
- Linksys MR7350: WDS Station for extended Ethernet r59451
- Linksys Velop WHW03v1 x2: OpenWRT w/GRETAP tunnel for VLANs on VAPs
- OSes: Fedora 40, 10 RPis (2,3,4,5), 23 ESP8266s: Straight from Amiga to Linux in '95, never having owned a Windows PC.

- Forum member #248
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