Cisco SR520-FE-K9 Administration Manual page 60

Setting up the Interfaces of the Services Ready Platforms
Setting up the Wireless LAN
Cisco SRP500 Series Services Ready Platforms Administration Guide (SRP520 Models)
Advanced Wireless Settings
Field
CTS Protection
Mode
DTIM Interval
Fragmentation
Threshold
Beacon Interval
Power Control
Description
The SRP automatically uses CTS (Clear-To-Send)
Protection Mode when your Wireless-N and Wireless-G
products are experiencing severe problems and are not
able to transmit to the SRP in an environment with heavy
802. 1 1b traffic. This function boosts the SRP's ability to
catch all Wireless-N and Wireless-G transmissions but
can impact performance. The default is Auto.
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 SRP has buffered broadcast or
multicast messages for associated clients, it sends the
next DTIM with a DTIM Interval value. Its clients hear the
beacons and awaken to receive the broadcast and
multicast messages. The default value is 1.
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.
Enter a value between 40 and 3500 milliseconds. The
Beacon Interval value indicates the frequency interval of
the beacon. A beacon is a packet broadcast by the SRP
to synchronize the wireless network. The default value
is 100.
Choose high, middle, or low to specify the range of the
wireless network. The default is high, which is a normal
power level.
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