User guide

5-35
Cisco WLAN Controller Web Interface User Guide
OL-7416-04
Chapter 5 Wireless Menu Bar Selection
802.11a Global Parameters
Signal Strength Contribution Always Enabled. Radio Resource Management (RRM) constantly
monitors the relative location of all access points within the
RF/mobility domain to ensure near-optimal channel re-use. The net
effect is an increase in Cisco WLAN Solution capacity and a
reduction in co-channel and adjacent channel interference.
Channel Assignment Leader MAC address of the channel assignment leader. In Cisco WLAN
Solution Mobility Groups or Cisco WLAN Solution WPS Groups,
this is the MAC address of the Group leader.
Last Channel Assignment Last time the Radio Resource Management (RRM) evaluated the
current channel assignment. This occurs on a periodic basis. This
does not imply that channels have changed, only that the Radio
Resource Management has made an evaluation of the current
assignment.
Table 5-40 Tx Power Level Assignment
Parameter Description
Power Level Assignment
Method
Dynamic transmit power assignment has three modes.
Automatic - The transmit power is periodically updated for all
access points that permit this operation.
On Demand - Transmit power is updated when the Invoke Power
Update Now button is clicked.
Fixed - No dynamic transmit power assignments occur and value are
set to their global default.
Default is Automatic.
Power Threshold These read-only parameters are used to fine tune the power control.
The transmit power control is trying to limit power so that at most
<neighbor count> access points receive the signal of each access
point above a <power threshold>.
Power Neighbor Count
Power Update Contribution This read-only field displays the factors used for changing power
level assignments. The factors are:
L (Load)
S (Signal)
N (Noise)
I (Interference)
For each factor listed, the corresponding measurement is used in the
power assignment algorithm.
Power Assignment Leader MAC address of the power level assignment leader.
Last Power Level Assignment The elapsed time since the last transmit power assignment in
seconds.
Table 5-39 RF Channel Assignment (continued)
Parameter Description