Cisco T-Mobile HIPORT+, Руководство пользователя

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16
User Guide
Chapter 4
Configuration
Wireless > Advanced Wireless Settings
This Wireless > Advanced Wireless Settings screen is used
to set up the ’s advanced wireless functions .
These settings should only be adjusted by an expert
administrator as incorrect settings can reduce wireless
performance .
Wireless > Advanced Wireless Settings
Advanced Wireless
Authentication Type The default is set to Auto , which
allows either Open System or Shared Key authentication
to be used . With Open System authentication, the sender
and the recipient do NOT use a WEP key for authentication .
With Shared Key authentication, the sender and recipient
use a WEP key for authentication .
Basic Rate The Basic Rate setting is not actually one rate
of transmission but a series of rates at which the
can transmit . The will advertise its Basic Rate to the
other wireless devices in your network, so they know which
rates will be used . The will also advertise that it
will automatically select the best rate for transmission . The
default setting is Default , when the can transmit
at all standard wireless rates (1-2Mbps, 5 .5Mbps, 11Mbps,
18Mbps, and 24Mbps) . Other options are 1-2Mbps , for
use with older wireless technology, and All , when the
can transmit at all wireless rates . The Basic Rate
is not the actual rate of data transmission . If you want to
specify the ’s rate of data transmission, configure
the Transmission Rate setting .
Transmission Rate
The rate of data transmission should
be set depending on the speed of your wireless network .
You can select from a range of transmission speeds, or you
can select
Auto
to have the automatically use the
fastest possible data rate and enable the Auto-Fallback
feature . Auto-Fallback will negotiate the best possible
connection speed between the and a wireless
client . The default value is
Auto
.
CTS Protection Mode
CTS (Clear-To-Send) Protection
Mode should remain disabled unless you are having severe
problems with your Wireless-G products not being able
to transmit to the in an environment with heavy
802 .11b traffic . This function boosts the ’s ability
to catch all Wireless-G transmissions but will severely
decrease performance .
Beacon Interval The default value is 100 . Enter a value
between 1 and 65,535 milliseconds . The Beacon Interval
value indicates the frequency interval of the beacon . A
beacon is a packet broadcast by the to synchronize
the wireless network .
DTIM Interval This value, between 1 and 255, indicates
the interval of the Delivery Traffic Indication Message
(DTIM) . A DTIM field is a countdown field informing
clients of the next window for listening to broadcast
and multicast messages . When the has buffered
broadcast or multicast messages for associated clients, it
sends the next DTIM with a DTIM Interval value . Its client
hear the beacons and awaken to receive the broadcast
and multicast messages . The default value is 1 .
Fragmentation Threshold This value specifies the
maximum size for a packet before data is fragmented
into multiple packets . If you experience a high packet
error rate, you may slightly increase the Fragmentation
Threshold . Setting the Fragmentation Threshold too low
may result in poor network performance . Only minor
reduction of the default value is recommended . In most
cases, it should remain at its default value of 2346 .
RTS Threshold Should you encounter inconsistent data
flow, only minor reduction of the default value, 2347 , is
recommended . If a network packet is smaller than the
preset RTS threshold size, the RTS/CTS mechanism will
not be enabled . The sends Request to Send (RTS)
frames to a particular receiving station and negotiates
the sending of a data frame . After receiving an RTS, the
wireless station responds with a Clear to Send (CTS) frame
to acknowledge the right to begin transmission . The RTS
Threshold value should remain at its default value of
2347 .
AP Isolation This isolates all wireless clients and wireless
devices on your network from each other . Wireless devices
will be able to communicate with the but not with
each other . To use this function, select On . AP Isolation is
turned Off by default .
Click
Save Settings
to apply your changes, or click
Cancel
Changes
to cancel your changes .