User's Manual

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Wireless Array
Configuring the Wireless Array 245
The Wireless Array’s Quality of Service Priority feature (QoS) allows traffic to be
prioritized according to your requirements. For example, you typically assign the
highest priority to voice traffic, since this type of traffic requires delay to be under
10 ms. The Array has four separate queues for handling wireless traffic at
different priorities, and thus it supports four traffic classes (QoS levels).
Figure 135. Priority Level—IEEE 802.1p (Layer 2)
IEEE802.1p uses three bits in an Ethernet frame header to define eight priority
levels at the MAC level (Layer 2) for wired networks. Each data packet may be
tagged with a priority level, i.e., a user priority tag. Since there are eight possible
user priority levels and the Array implements four wireless QoS levels, user
priorities are mapped to QoS as described below.
Figure 136. 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