Siemens EF 711 Series Betriebsanweisung PDF herunterladen (Seite 125)

Configuring the Wireless AP

Configuring Wireless AP Settings

SCALANCE WLC711

User Guide, V8.11, 07/2012, C79000-G8976-C260-03 3-37

Achieving High Throughput with the Wireless 802.11n AP

To achieve link rates of up to 450Mbps with the Wireless 802.11n AP, configure your system as

described in the following section.

Note:

Maximum throughput cannot be achieved if both 802.11n and legacy client devices are to be supported.

Note:

Some client devices will choose a 2.4GHz radio even when a 5GHz high-speed radio network is available;

you may need to force those client devices to use only 5GHz if you have configured high throughput only on

the 5GHz radio.

To Achieve High Throughput with the Wireless 802.11n AP:

1. From the top menu, click Wireless APs. The Wireless AP screen is displayed.

2. In the Wireless AP list, click the Wireless 802.11n AP you want to configure.

3. Click the Radio 2 tab, and then do the following:

– In the Radio Mode drop-down list, click b/g/n.

– In the Channel Width drop-down list, click 40MHz.

Note:

Some client devices do not support 40MHz in b/g/n mode. To accommodate these clients, you must enable a/

n mode on the Radio 1 tab. Otherwise, the client device will connect at only 130Mbps.

– In the Guard Interval drop-down list, click Short.

– In the 11g Settings section, click None in the Protection Mode drop-down list.

Protection Type Click a protection type: CTS Only or RTS CTS. The default and

recommended setting is CTS Only. Click RTS CTS only if an 11b

AP that operates on the same channel is detected in the

neighborhood, or if there are many 11b-only clients in the

environment.

Note: The overall throughput is reduced when Protection Mode

is enabled, due to the additional overhead caused by the RTS/

CTS. The overhead is minimized by setting Protection Type to

CTS Only and Protection Rate to 11 Mbps. The overhead

causes the overall throughput to be sometimes lower than if just

11b mode is used. If there are many 11b clients, Siemens

recommends that you disable 11g support (11g clients are

backward compatible with 11b APs). An alternate approach,

although potentially a more expensive method, is to dedicate all

APs on a channel for 11b (for example, disable 11g on these APs)

and disable 11b on all other APs. The difficulty with this method is

that the number of APs must be increased to ensure coverage

separately for 11b and 11g clients.

Table 3-9 Radio Properties (continued)

Field Description

1 2 ... 120 121 122 123 124 125 126 127 128 129 130 ... 491 492

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