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Advanced Configuration AP-4000 Series User Guide
QoS
103
Figure 4-33 Add Priority Mapping Entry
3. Select the 802.1p Priority (from 0-7) for 802.1d Priorities 0-7.
4. Click OK.
5. Click Add in the IP Precedence/DSCP ranges and 802.1d Priority table.
6. Select the IP DSCP Range for each 802.1d Priority.
7. Click OK.
NOTE: Changes to Priority Mapping require a reboot of the AP to take effect.
Enhanced Distributed Channel Access (EDCA)
WME uses Enhanced Distributed Channel Access, a prioritized CSMA/CA access mechanism used by WME-enabled
clients/AP in a WME enabled BSS to realize different classes of differentiated Channel Access.
A wireless Entity is defined as all wireless clients and APs in the wireless medium contending for the common wireless
medium. EDCA uses a separate channel access function for each of the Access Categories (Index) within a wireless
entity. Each channel access function in a wireless entity that contends for the wireless medium as if it were a separate
client contending for the wireless medium. Different channel access functions in a given Wireless Entity contend among
themselves for access to the wireless medium in addition to contending with other clients.
STA EDCA Table and AP EDCA Table
This page is used to configure the client (STA) and AP Enhanced Distributed Channel Access (EDCA) parameters. You
can modify the EDCA values for both Wireless A and Wireless B.
The EDCA parameter set provides information needed by the client stations for proper QoS operation during the wireless
contention period. These parameters are used by the QoS enabled AP to establish policy, to change policies when
accepting new stations or new traffic, or to adapt to changes in the offered load. The EDCA parameters assign priorities
to traffic types where higher priority packets gain access to the wireless medium more frequently than lower priority
packets.
NOTE: Default recommended values for EDCA parameters have been defined; Proxim recommends not modifying
EDCA parameters unless strictly necessary.