Cisco Wireless Bits Worth Knowing: Beamforming

Here are a few wireless Tidbits I want to get down so I remember them later:

Beamforming:
Beamforming creates a stronger signal for downstream clients by noticing the client and adjusting the transmitter timing so that the signal appears stronger to the client. This is also known as Cisco clientlink. Clientlink 1.0 is used for abg devices, clientlink 2.0 is for 802.11n devices using 1,2 or 3 spatial streams.

This feature was configurable in pre 7.2 releases of code but from 7.2 onwards it is on by defualt and cannot be disabled as there would be no advantage to doing so.

Clientlink is a Cisco standard, there is an 802.11n enhanced beamforming specification but it is not as mature and feature rich:

This table is taken from the Cisco 166/2600/3600 deployment guide, link below.


References:
1600/2600/3600 deployment guide:
http://www.cisco.com/en/US/docs/wireless/technology/apdeploy/7.5/Cisco_Aironet75.pdf