FreeBSD 14.3 intel WiFi high speed not working

From: Petru Garstea <peter.garshtja_at_ambient-md.com>
Date: Wed, 11 Jun 2025 14:00:23 UTC 
Greetings,

I am experiencing low network speeds on a FreeBSD 14.3 with an Intel 
wifi chipset.
Below are the details:

> iwm0: <Intel(R) Dual Band Wireless AC 9560> mem 0xdc238000-0xdc23bfff 
> at device 20.3 on pci0

> wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 
> 1500
>         options=0
>         ether 40:ec:99:e8:ba:b1
>         inet $IP netmask 0xffffff00 broadcast $NETMASK
>         groups: wlan
>         ssid $AP channel 157 (5785 MHz 11a) bssid 3c:5c:f1:25:bd:85
>         regdomain FCC country US authmode WPA2/802.11i privacy ON
>         deftxkey UNDEF AES-CCM 2:128-bit txpower 23 bmiss 10 mcastrate 6
>         mgmtrate 6 scanvalid 60 wme roaming MANUAL
>         parent interface: iwm0
>         media: IEEE 802.11 Wireless Ethernet OFDM/54Mbps mode 11a
>         status: associated
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

> > freebsd-version -kru
> 14.3-RELEASE
> 14.3-RELEASE
> 14.3-RELEASE

> FreeBSD 14.3-RELEASE FreeBSD 14.3-RELEASE 
> releng/14.3-n271432-8c9ce319fef7 GENERIC amd64

> > doas fwget
> Needed firmware packages: 'gpu-firmware-intel-kmod-kabylake 
> wifi-firmware-iwlwifi-kmod-9000'
> The most recent versions of packages are already installed

> > kldstat
> Id Refs Address                Size Name
> 16    1 0xffffffff836ab000    b1270 if_iwlwifi.ko
> 17    1 0xffffffff8375d000    17314 if_iwm.ko
> 21    1 0xffffffff83800000   28fef0 iwm9000fw.ko

Please advise.

Regards,
Peter/Petru