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Thus I would trust it would benefit WLAN performance, particularly when also deploying the kernel's MTU probing feature (net.ipv4.tcp_mtu_probing = 1).
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The extended MSDU size is only available on 802.11ad devices, it doesn't affect any 2.4/5 GHz devices. Those are still limited to 2304 bytes.
And if you use a 802.11ad device (or more specifically a wil6210 device), the kernel will allow the higher MTU.
Furthermore neither A-MPDU nor A-MSDU allow you sending larger frames, these are just means of sending multiple frames in one transmission. This is already done by the kernel if supported by the hardware.
So the correct resolution would be "not a bug", not "won't fix".
n8v8R:
/etc/config/network config device option name wlan option mtu 2305
/etc/config/wireless
config wifi-iface
option device 'radio0'
option ifname 'wlan'
Start the network and the mtu remains at 1500. Lowering the setting to 2304 and it is accepted.
According to my understanding from reading various publications, and I take this one as sample reference https://www.oreilly.com/library/view/80211ac-a-survival/9781449357702/ch03.html, 802.11n and 802.11ac support jumbo frames through MPDU (MAC frame) size and A-MSDU (aggregate MAC payload) respectively.
Thus I would trust it would benefit WLAN performance, particularly when also deploying the kernel's MTU probing feature (net.ipv4.tcp_mtu_probing = 1).
The text was updated successfully, but these errors were encountered: