WAX650S power mode and antenna

Currently I'm running our WAX650S on a GS1920-24HPv2 with PoE+. The configuration is forced to full power. On the status page that is confirmed (shows a star on the status page). According to the GS1920 the power used varies between 10 and 15W. Nowhere near 30W. There are 20 to 25 wifi clients connected, most use 802.11n and 802.11ac. 

When I look at the AP Information the transmit power is 18 (dBm) which is almost right on the value set by regional regulators  But I cannot determine what antenne configuration is actually in use, 2x4 or 4x4 on both 2.4 and 5GHz. I'm still going through the diagnostic files (have almost no documentation about that) 

I'm trying to find why eight 5GHz devices (HomePod mini's), which connect with 802.11n 20MHz mode (72Mbps), can hog the network utilisation over 80% while the WAX650S is set to 80MHz mode. This happens when there's a multicast of barely 3Mbps to all these devices. It slows the network significantly. There should be enough bandwidth left or am I wrong here?

Those settings are already in effect. DCS is off and DFS is off (as far as regulations allow).

On 2.4GHz its limited to 20MHz due to the fact that there are too many other neighbouring AP's, and most annoying they all use the American default channel 6 or 11 instead of the international 4-channel deployment setting. We now use channel 9, but this band is only used for 4 IoT devices that cannot connect to 5GHz. The multicast setting is set to fixed 2Mbps. Intra-BSS Traffic blocking is enabled on the network on the SSD. With only 4 clients connected, the utilisation reported is 9%

On 5GHz, which is the main network, is set to channel 52 (80MHz). This channel group seems to be avoided by neighbouring AP's. Most of them use the lower channels outside DFS. Usually we experience no disconnects or frequent DFS events. The multicast setting is set to fixed 6 Mbps. No Intra-BSS Traffic blocking here.

Most small devices use 802.11n on this band, Phones and MacBooks' use 802.11ac. I've seen only one use 802.11ac-MU once.


I've done some testing with audiostreaming. Since the network is actively in use, I can't change every network parameter every hour, so I've done some simple testing:

Test situation: 5 HomePod mini's, two pairs and one single HomePod. So 5 devices in total. 

Test 1:
First pair HomePod streaming directly to the others (Airplay2), results in a utilisation value of 80% on 5GHz.

Test 2:
Mac iTunes (Airplay1) streaming from ethernet to all HomePod mini's. Utilisation value: 30-50%.
Ethernet measures about 2MB/s throughput.

Test 3:
iPhone Music (802.11ac) streaming (Airplay2) to the all HomePod mini's. Utilisation value: starting at 78% on each song, eventually failing playback.

So question remains, how can I find out which antenna mode the WAX650S is using? Its unclear if 802.11n devices like the HomePod mini really benefit from the 4x4 array - it doesn't seem like it. 

Firmware in use: V6.40(6) / 2022-07-14 03:15:29
HomePod: v15.5

Hi,

At this moment the WAX650S unit is in stand-alone mode for this network. It is connected to a GS1920-24HPv2. 

There was not much difference noticeable when the "multicast to unicast" option was enabled before I did that last test. But I'll try the 12Mbps option later this week. 

Until then. Thank you.