MSM3xx, MSM4xx, HP 425, and HP 517 APs Release Notes v6.4.0.0

Use this parameter to restrict access to the wireless network to specific types of wireless clients.
NOTE: This parameter is only configurable when Wireless mode supports 802.11n.
802.11n only: Only wireless clients supporting 802.11n can connect. This prevents 802.11a/b/g
client stations from accessing the wireless network.
New local mesh parameter
A new parameter, Search for better link on minimum SNR, has been added to local mesh configuration
for Alternate Master and Slave nodes.
6 Changes to the management tool