Xirrus XR Series User Manual

Wireless Access Point
Configuring the Wireless AP 271
Figure 151. 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 AP implements four wireless QoS levels, user
priorities are mapped to QoS as described below.
Figure 152. Priority Level—DSCP (DiffServ - Layer 3)
Differentiated Services Code Point or DiffServ (DSCP) 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replaces the outdated Type of Service (TOS) field.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 AP’s four traffic classes.

Xirrus XR Series Specifications

General

Brand	Xirrus
Model	XR Series
Category	Wireless Access Point
Language	English