User's Guide

Table Of Contents
Configuring the Wireless AP
hwc_apstartup.fm
Configuring Wireless AP settings
9034530-02, March 2010
164 HiPath Wireless Controller, Access Points and Convergence Software V7.11, User Guide
Total # of Retries for Voice VO – Click the number of retries for the
Voice transmission queue. The default value is adaptive (multi-rate).
The recommended setting is adaptive (multi-rate).
Total # of Retries for Turbo Voice TVO – Click the number of retries for
the Turbo Voice transmission queue. The default value is adaptive
(multi-rate). The recommended setting is adaptive (multi-rate).
17. In the Advanced dialog 11b Settings section, do the following:
•Preamble – Click a preamble type for 11b-specific (CCK) rates: Short or
Long. Click Short if you are sure that there is no pre-11b AP or a client
in the vicinity of this AP. Click Long if compatibility with pre-11b clients is
required.
18. In the Advanced dialog 11g Settings section, do the following:
Protection Mode – Click a protection mode: None, Auto, or Always.
The default and recommended setting is Auto. Click None if 11b APs and
clients are not expected. Click Always if you expect many 11b-only
clients.
Protection Rate – Click a protection rate: 1, 2, 5.5, or 11 Mbps. The
default and recommended setting is 11. Only reduce the rate if there are
many 11b clients in the environment or if the deployment has areas with
poor coverage. For example, rates lower than 11 Mbps are required to
ensure coverage.
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, it is recommended
to disable 11g support (11g clients are backward compatible with 11b APs).
An alternate approach, although 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.
19. Click Close. The Advanced dialog is closed.
20. To save your changes, click Save.