Product and Software: This article applies to ArubaOS Version 220.127.116.11.
A-MSDU consists of multiple 802.3 frames (layer 3-7 payload), remove 802.3 header & trailer, then wrap the multiple MSDU into a single 802.11 frame.
In other words its a Frame aggregation method of combining multiple frames into a single frame transmission. Benefit is fixed MAC layer overhead is reduced, and overhead caused by random back-off timer during medium contention is also minimized.
- All MSDUs are intended to a single destination.
- Each MSDU belongs to the same TID (QoS class).
- The entire aggregated frame can be encrypted.
- Only normal acknowledgements are required when using A-MSDU.
Aruba does support Rx A-MSDU, not Tx A-MSDU.