Cisco TES301 User Manual page 82
Ip managed services home gateway
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Chapter 4 Configuring Advanced Settings
Field
DTIM Internal
Fragmentation Threshold
CTS Protection Mode
RTS Threshold
Preamble Type
64
Description
This value 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 Gateway 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.
TS (Clear-To-Send) Protection Mode's default setting is Auto.
The Gateway will automatically use CTS Protection Mode
when your Wireless-N and Wireless-G products are
experiencing severe problems and are not able to transmit to
the Gateway in an environment with heavy traffic. This
function boosts the Gateway's ability to catch all Wireless-B,
Wireless-G, Wireless-A and Wireless-N transmissions but will
severely decrease performance.
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 Gateway
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.
Select Long to uses a 128 bits "sync" filed. Select Short to uses a
56 bits "sync" field.
4038767 Rev B
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