HP ProCurve 530 NA, Руководство по управлению и настройке

Страница: 167 / 556

6-15
Wireless Interface Configuration
Configuring the Radio
•
Short
: Sets the slot time to 9 microseconds. A short slot time can
increase data throughput on the access point, but its use requires that
all stations can support a short slot time (that is, 802.11g-compliant
stations must support a short slot time).
•
Long
: Sets the slot time to 20 microseconds. A long slot time is required
if the access point must support 802.11b stations.
■ Fragmentation Threshold
: Configures the minimum packet size that
can be fragmented when passing through the access point. Fragmentation
of the PDUs (package data units) can increase the reliability of transmis-
sions because it increases the probability of a successful transmission due
to smaller frame size. If significant interference is present, or collisions
due to high network utilization, try setting the fragment size to send
smaller fragments. This speeds the retransmission of smaller frames. It is
more efficient to set the fragment size larger if very little or no interference
is present, because it requires overhead to send multiple frames. If set to
2346, this feature is disabled. Range: 256–2346, even numbers. (The
default is
2346
.)
■
Beacon Interval: The rate at which beacon frames are transmitted from
the access point. The beacon frames allow wireless stations to maintain
contact with the access point. They may also carry power-management
information. Range: 20–2000 K-us (The default is
100
.)
■ Rate Sets: Rates are expressed in megabits per second.
• Supported Rate Sets: Indicates rates that the access point supports.
The AP automatically chooses the most efficient rate, based on
factors like error rates and distance of client stations from the AP.
• Basic Rate Sets: Indicates rates that the access point will advertise
to the network for the purpose of setting up communication with
other APs and client stations on the network. It is generally more
efficient to have an AP broadcast a subset of its supported rate sets.
■ [Update]: Updates the advanced radio parameters.
N OT E
If you want to configure the access point to completely ignore 802.11b
stations, the required settings are:
• Protected Mode: Disable
• Supported Rate Sets: Disable (1 Mbps, 2 Mbps, 5.5 Mbps, and 11 Mbps)
For the advanced Pure G Mode configuration details, see
“To Configure Pure G
Mode:” on page 6-20
.