Avaya WLAN Security Switch 2300 Series, Руководство по устранению неполадок и отладке, Страница: 25 / 74

25
Avaya WLAN Security Switch 2300 Series Troubleshooting and Debug Guide
Look for auto-tune power level change messages. The algorithm will turn the power up if it sees clients
retransmitting packets at a rate exceeding “max-retransmissions” (configured on the radio), and this is
frequently the reason. You may need to reset on of the APs and monitor the logs – if it’s already tuned to
maximum power in response to client retransmissions it will not log further messages. Rebooting the AP will
set it back to the baseline power and show modifications from there.
If a client is reporting rapid signal strength fluctuations be sure to check the logs around this time to see if the
AP’s power is raising or lowering in response to the client. If it is, skip to step 4.
Collect the output of “show auto-tune neighbors”
This command displays all of the neighbors seen by each radio. This will give you an idea of how many other
APs are visible from each radio, and how loud they are. The baseline power will be adjusted so that the radio
will just barely be able to transmit to the Nth farthest AP. For 802.11bg, N=3. For 802.11a N=8. If the Nth AP
has a low RSSI, the radios power will be relatively high.
Disable the “reach-out” functionality of Auto-Tune
The AP will attempt to increase power to improve a client’s connectivity. This behavior will tend to leave APs
operating closer to maximum power. If you want to disable this functionality you will need to adjust the “Data
Retransmission” value on each radio to be 100% instead of the default of 10%. This will for the APs to stay at
the “initial” power setting as determined by the Nth farthest AP.
Disable Auto-Tune Power
If clients are still experiencing issues, use the “Apply Auto-Tune Settings” option under the “Manage” menu in
WMS to convert the dynamic settings to static configuration and disable the auto-tune feature.
Data Rate Enforcement
If the data rate enforcement is having problem, collect the following CLI output:
show ap counters
The show ap counters command lists the number of times a client attempts to connect with a disabled data
rate.
For example,
Syntax
wss# sh ap counters
AP: 2 radio: 2
LastPktXferRate 6 PktTxCount 42847
5
NumCntInPwrSave 0 MultiPktDrop 0
LastPktRxSigStrength -57 MultiBytDrop 0
LastPktSigNoiseRatio 38 User Sessions 1