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Cisco Wireless LAN Controller Configuration Guide
OL-17037-01
Chapter 4 Configuring Controller SettingsWireless Device Access
Configuring Client Roaming
Using the GUI to Configure CCX Client Roaming Parameters
Follow these steps to configure CCX client roaming parameters using the GUI.
Step 1
Click
Wireless
>
802.11a/n
(or
802.11b/g/n
) >
Client Roaming
. The 802.11a (or 802.11b) > Client
Roaming page appears (see
).
Figure 4-13
802.11a > Client Roaming Page
Step 2
If you want to fine-tune the RF parameters that affect client roaming, choose
Custom
from the Mode
drop-down box and go to
. If you want to leave the RF parameters at their default values, choose
Default
and go to
.
Step 3
In the Minimum RSSI field, enter a value for the minimum received signal strength indicator (RSSI)
required for the client to associate to an access point. If the client’s average received signal power dips
below this threshold, reliable communication is usually impossible. Therefore, clients must already have
found and roamed to another access point with a stronger signal before the minimum RSSI value is
reached.
Range:
–80 to –90 dBm
Default:
–85 dBm
Step 4
In the Hysteresis field, enter a value to indicate how much greater the signal strength of a neighboring
access point must be in order for the client to roam to it. This parameter is intended to reduce the amount
of roaming between access points if the client is physically located on or near the border between two
access points.
Range:
2 to 4 dB
Default:
2 dB
Step 5
In the Scan Threshold field, enter the minimum RSSI that is allowed before the client should roam to a
better access point. When the RSSI drops below the specified value, the client must be able to roam to a
better access point within the specified transition time. This parameter also provides a power-save
method to minimize the time that the client spends in active or passive scanning. For example, the client
can scan slowly when the RSSI is above the threshold and scan more rapidly when below the threshold.
Range:
–70 to –77 dBm
Default:
–72 dBm
