As of LCOS 9.00, you are able to set the maximum bandwidth for each WLAN module.
It is no longer possible to force 40MHz channel bundling.
Changes to WLCs
- Max. channel bandwidth
- Enter how and to what extent the AP specifies the channel bandwidth for the physical WLAN interface(s). The following values are possible:
- Automatic: The access point automatically detects the maximum channel bandwidth (default).
- 20MHz: The access point uses channels bundled at 20 MHz.
- 40MHz: The access point uses channels bundled at 40MHz.
- 80MHz: The access point uses channels bundled at 80MHz.
- 802.11n can use 52 carrier signals in a 20-MHz channel for modulation, and even up to 108 carrier signals in a 40-MHz channel. The use of the 40 MHz option for 802.11n therefore means a performance gain of more than double.