Wireless Interface Configuration - Update

Use this page to modify and view settings of the Wireless interface parameters for the AP and interface index shown in the Summary Selection.

1. In the Interface Description box, type the text description of the wireless interface. The description can be up to 256 alphanumeric characters long and contain spaces (for example, Lobby AP  interface 1). By default, the description is ieee80211-ap_id-index_ID.
2. In the Administrative Status drop-down list, select whether the interface is to be used:
   • Up--Enable the interface
   • Down--Disable the interface
   • Testing--AP is undergoing testing
3. In the Channel drop-down list, select the channel number for the wireless interface to use.

   The channel numbers that display are dependent on the RF Band Selection and the regulatory domain for each country; for example, in the United States 802.11b shows channels 1 through 11 and 802.11a shows channels 36, 40, 44, etc. Two access points can belong to the same virtual AP only if they are on the same channel. Thus, two neighboring access points on different channels cannot perform seamless handoff (0 ms).

4. In the Short Preamble list, select whether to enable use of short preambles:
   • On
   • Off

   Short preambles are more efficient on the air, but not all clients support them. If you enable short preambles, do not select both antennas in the Antenna Selection.

5. In the RF Band Selection list, select the RF Band this interface uses (selections are based on the AP model and radio cards installed); for example, 802.11an.
6. In the Antenna Selection list, select which antenna side the access point uses:
   • Left antenna
   • Right antenna
   • Both antennas
   • AP300 option TBD
   You can select one access point antenna to transmit left or right. If you select both antennas, the system picks the antenna with the strongest signal. You cannot enable short preambles and select both antennas.

7. Meru AP radios operate at their maximum power level by default. High power level increases the signal strength of the frames received by the client stations, allowing a client station to decode frames at a higher rate and increasing the coverage area. This causes minimal interference because Meru uses Virtual Cell technology, moving clients to a better AP without re-association. For a very few cases, we recommend that you reduce the power level on APs due to co-channel-interference. Check with Support first to make sure your issue really is due to co-channel-interference. To change transmit power, change the value in the Transmit Power High (dBm) field. The maximum level depends on the country code and the RF band in use.

   • Valid range for an 802.11a  radio:  5 to 23—36 dBm (for US)
   • Valid range for an 802.11bg radio:  4 to 30 dBm (for US)
   • Valid range for an 802.11n radio: There is no valid range explicitly for 802.11n radio; use the same values as 802.11a or 802.11bg radio.

8. In the AP Mode list, select whether the radio for the interface is in Normal Mode (servicing clients) or Scanning Mode (monitoring for Rogue APs).

9. In the Protection Mechanism list, if configuring an AP200, select whether this radio interface will support the 802.11-1999 standard mode with One-Frame Protection (default) or the WMM-style TXOP Protection mode (for improved performance in 802.11bg mixed mode). When AP200s operate using the WMM-style TXOP Protection, they are optimized to operate with both 802.11b (11Mbps) and 802.11g (54 Mbps) clients at significantly higher throughput than other wireless systems. (When other wireless APs attempt to operate with both b and g clients, their protection modes essentially slow the throughput down to 802.11b speed.) The default mode for 802.11b and 802.11a is One-Frame Protection (i.e. no protection).
10. In the Protection Mode list, select whether the default Protection Mechanism for the type of radio is selected (Auto) or set to On or Off. With Auto selected, 802.11bg Dual-Speed mode can operate on AP200 with optimal performance if 802.11b clients are present. 
    • Auto:  While 802.11b clients are detected, perform the protection mode.
    • Off:  Protection mode is off.
    • On: Protection mode is enabled.
11. In the Channel Width  list, select:
    •   20 MHz
    • 40MHz Extension Channel Above
    • 40MHz Extension Channel Below
12. In the MIMO Mode list, select: 
    • 2x2 if you are using an 802.3af PoE 
    • 3x3 if you are using a high-powered PoE or DC power
13. 802.11n only mode is for AP300s with N capability. Select:
    • On: to support only 802.11n
    • Off: (Default) to support 802.11an or 802.1bgn
14. Virtual Cell Mode enables Virtual Cell. Note that you also must set the ESS profile to Virtual Cell on and Virtual Port. Note that you cannot mix Virtual Cell and non Virtual Cell ESSIDs on the same AP300 radio.
• On: to enable per-station Virtual Cell on AP300
• Off: (Default) to disable per-station Virtual Cell on AP300
15. Probe Response Threshold restricts the far away AP and quickly responds to the probe request sent from a nearby station. It is configurable through GUI support in addition to AP CLI. This feature is also configured via bulk update on per AP interface level. The default is 15. It is per interface configuration, the Probe Response threshold can be configured separately on both the interfaces.
16. Click OK to update the wireless interface table.

To view read-only settings for this wireless interface, click Show Detail Info.