How to determine if AP is operating in 4x4:4

[Dennis]

- 3935i-ROW on FW 10.41.06.0013
- patched to HP J9148A 2910al-48G-PoE+ Switch

AP Inventory report shows LAN1 using AF and not AT. Switch is capable of delivering 33W on a port. I'm still investigating but it appears disabling LLDP PoE negotiation on the HP switch via command:
no lldp config dot3TlvEnable poe_config... resolves the issue and AP Inventory report shows LAN1 using AT.

I just want to be certain that after doing this the AP is indeed operating in 4x4:4 MU-MIMO. Is there a way to tell, perhaps via logs on the AP?

[Dennis]

Hi Gareth, yes it does for some APs at a particular site. I do not (yet) have access to the switch at this site so I cannot confirm if LLDP is enable or disabled.

I understand LLDP-MED is an extension of LLDP, but what does this mean for my scenario. Thanks.

[Gareth_Mitchell]

Dennis

The command is iwconfig, not ifconfig.

With LLDP enabled on your switch in the AP reports, do you see lldp-med-overide, next to where it says "AF" - take a look at this article: https://gtacknowledge.extremenetworks.com/articles/Solution/AP3935-on-S8-switch-operates-on-802-3af-...

-Gareth

[Dennis]

Thanks Umut. I take it wifi0 = 5GHz band and wifi1 = 2.4GHz. I don't see data rate, only total RX and TX, example:
CA-L1-SOUTHEAST# ifconfig wifi0
wifi0 Link encap:UNSPEC HWaddr D8-84-66-7B-97-00-F0-BE-00-00-00-00-00-00-00-00
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1076129 errors:0 dropped:0 overruns:0 frame:0
TX packets:2150922 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:2699
RX bytes:172031006 (164.0 MiB) TX bytes:2892170894 (2.6 GiB)
Interrupt:68

[Ronald_Dvorak]

You'd trace the 802.11 beacon frames and check the supported speeds or connect with a client that is capable of that and then check the MCS that the client is using near the AP.

https://en.wikipedia.org/wiki/IEEE_802.11ac#Data_rates_and_speed

[Dennis]

Ronald, can you expand on that? I assume tracing would involve a client with Wi-Fi adapter in monitor mode? Thanks.