D-Link DWS-1008 Cli Reference Manual page 175

DWS-1008 CLI Reference Guide
radio 1
radio 2
retransmissions
Defaults:
Access:
Usage:
If the retransmissions still exceed the threshold after the minimum allowed data rate is
reached, the radio increases power by 1 dBm. The radio continues increasing the power in
1 dBm increments until the retransmissions fall below the threshold. After the retransmissions
fall below the threshold, the radio reduces power by 1 dBm. As long as retransmissions
remain below the threshold, the radio continues reducing power in 1 dBm increments until it
returns to its default power level.
Note: A radio also can increase power, in 1 dBm increments, if a client falls below the
minimum allowed data rate. After a radio increases power, all clients must be at the minimum
data rate or higher and the maximum retransmissions must be within the allowed percentile,
before the radio begins reducing power again.
Examples:
DWS-1008# set ap 6 radio 1 auto-tune max-retransmissions 20
success: change accepted.
D-Link Systems, Inc.
Radio 1 of the DWL-8220AP.
Radio 2 of the DWL-8220AP.
Percentage of packets that can result in retransmissions without
resulting in a channel change. You can specify from 1 to 100.
The default is 10 percent
Enabled.
A retransmission is a packet sent from a client to an DWL-8220AP radio that
the radio receives more than once. This can occur when the client does not
receive an 802.11 acknowledgement for a packet sent to the radio.
If the radio receives only a single copy of a packet that is transmitted multiple
times by a client, the packet is not counted by the radio as a retransmission.
For example, if a packet is corrupted and the radio does not receive it, but the
second copy of the packet does reach the radio, the radio does not count
the packet as a retransmission since the radio received only one recognizable
copy of the packet.
The interval is 1000 packets. If more than the specified percentage of packets
within a group of 1000 packets received by the radio are retransmissions, the
radio increases power.
When the percentage of retransmissions exceeds the max-retransmissions
threshold, the radio does not immediately increase power. Instead, if the data
rate at which the radio is sending packets to the client is above the minimum
data rate allowed, the radio lowers the data rate by one setting. If the retransmissions
still exceed the maximum allowed, the radio continues to lower
the data rate, one setting at a time, until either the retransmissions fall within
the allowed percentile or the minimum allowed data rate is reached.
The following command changes the max-retransmissions value to 20:
Access Point Commands
174