两个关于无线的feature

[Xiang]

1.Aironet IE

Aironet IE 建议在voice的无线SSID上开启，在普通的SSID建议关闭，该feature只支持思科的设备，比如思科的无线话机，Aironet里包含了load,ap name等等信息，可以帮助无线语音终端快速连接并且提高漫游速度。

2.Clinet Band select

该feature个人觉得非常可用，勾上该feature，AP会忽略前两个（默认是2个，具体可以在wireless,advance， band select下更改）2.4G的请求帧，这样终端首先会尝试5G频段连接，如果在20S内没有5G连接，则终端会再去选择2.4G连接。

如果有不对的地方，欢迎各位指出。

[Rps-Cheers]

Aironet IE

• Description—CCX Aironet IE feature should be disabled. Clicking Fix it Now disables CCX Aironet IE.

  Aironet IE is a Cisco proprietary attribute used by Cisco devices for better connectivity. It contains information, such as the access point name, load, number of associated clients, and so on sent out by the access point (AP) in the beacon and probe responses of the WLAN. The Cisco Client Extensions (CCX) clients use this information to choose the best AP with which to associate.

  The CCX software is licensed to manufacturers and vendors of third-party client devices. The CCX code resident on these clients enables them to communicate wirelessly with Cisco APs and to support Cisco features that other client devices do not. The features are related to increased security, enhanced performance, fast roaming, and power management.

  Aironet IE is optional for CCX based clients, however it can cause compatibility issues with some types of wireless clients. The recommendation is to enable for WGB and Cisco voice, but for general production network, it can be beneficial to disable Aironet IE after testing.

When configuring the global Band Select features:

• The cycle count is the number of times a client is denied before being allowed on 2.4 GHz.
• The cycle period is how much time needs to pass for the next associating attempt to be considered a unique attempt.
• Age Out Suppression: When the clients will be declared as “new” and may have their probe frames delayed/ignored again.
• Age Out Dual Band: The AP will not respond to a 2.4 G-Hz probe until a (dual-band) client is no longer marked as dual-band (default is 60 seconds). This is to prevent clients associated on 5 G-Hz radio from switching back to 2.4 G-Hz radio.
• And the Acceptable Client RSSI is how well a 2.4 GHz client needs to be heard before trying to push them to the 5 GHz band.