Wireless Access Point
380 Configuring the Wireless AP
The DSCP Mappings page shows the default mapping of each of the 64 DSCP
values to one of the AP’s four QoS levels, and allows you to change these
mappings.
For a detailed discussion of the operation of QoS and DSCP mappings on the AP,
please see “Understanding QoS Priority on the Wireless AP” on page 270.
Procedure for Configuring DSCP Mappings
1. DSCP to QoS Mapping Mode: Use the On and Off buttons to enable or
disable the use of the DSCP mapping table to determine the QoS level
applied to each packet.
2. DSCP to QoS Mapping: The radio buttons in this table show all DSCP
values (0 to 63), and the QoS level to which each is mapped. To change the
QoS level applied to a DSCP value, click the desired QoS level (0 to 3)
underneath it.
Roaming Assist
Roaming assist is a Xirrus feature that helps clients roam to APs that will give
them high quality connections. Some smart phones and tablets will stay
connected to a radio with poor signal quality, even when there’s a radio with
better signal strength within range. When roaming assist is triggered, the AP
“assists” the device by deauthenticating it when certain parameters are met. This
encourages a client with a high roaming threshold (i.e., a device that may not
roam until signal quality has seriously dropped) to move to an AP that gives it a
better signal. The deauthentication is meant to cause the client to choose a
different radio. You can specify the device types that will be assisted in roaming.
The roaming threshold is the difference in signal strength between radios that will
trigger a deauthentication. If the client’s signal is lower than the sum of the
threshold and the stronger neighbor radio’s RSSI, then we “assist” the client. For
example:
Threshold = -5
RSSI of neighbor AP = -65
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