User's Manual

Wireless Array
Configuring the Wireless Array 249
user priority levels and the Array implements four wireless QoS levels, user
priorities are mapped to QoS as described below.
Figure 137. Priority Level—DSCP (DiffServ - Layer 3)
DSCP (Differentiated Services Code Point or DiffServ) uses 6 bits in the IPv4 or
IPv6 packet header, defined in RFC2474 and RFC2475. The DSCP value classifies
a Layer 3 packet to determine the Quality of Service (QoS) required. DSCP
replaces the outdated Type of Service (TOS) field.
The description below describes how both of these priority levels are mapped to
the Array’s four traffic classes.
End-to-End QoS Handling
 Wired QoS - Ethernet Port:
Ingress: Incoming wired packets are assigned QoS priority based on their
SSID and 802.1p tag (if any), as shown in the table below. This table
follows the mapping recommended by IEEE802.11e.
FROM
Priority Tag
802.1p (Wired)
TO
Array QoS
(Wireless)
Typical Use
0 0 (Lowest
priority)
Best Effort
1 1 Background — explicitly designated as
low-priority and non-delay sensitive