User's Manual

Virtual Network configuration
hwc_vnsconfiguration.fm
Working with Quality of Service (QoS)
A31003-W1050-U100-2-7619
, March 2008
222 HiPath Wireless Controller, Access Points and Convergence Software V5 R1 , C20/C2400 User Guide
Table 24 QoS mode combinations
The APs are capable of supporting 5 queues. The queues are implemented per
radio. For example, 5 queues per radio. The queues are:
Table 25 Queues
The HiPath Wireless Controller supports the definition of 8 levels of user priority
(UP). These priority levels are mapped at the AP to the best appropriate access
class. Of the 8 levels of user priority, 6 are considered low priority levels and 2 are
considered high priority levels.
WMM clients have the same 5 AC queues. WMM clients will classify the traffic
and use these queues when they are associated with a WMM-enabled AP. WMM
clients will behave like non-WMM clients—map all traffic to the Best Effort (BE)
queue—when not associated with WMM-enabled AP.
The prioritization of the traffic on the downstream (for example, from wired to
wireless) and on the upstream (for example, from wireless to wired) is dictated by
the configuration of the VNS and the QoS tagging within the packets, as set by
the wireless devices and the host devices on the wired network.
Both Layer 3 tagging (DSCP) and Layer 2 (802.1d) tagging are supported, and
the mapping is conformant with the WMM specification. If both L2 and L3 priority
tags are available, then both are taken into account and the chosen AC is the
highest resulting from L2 and L3. If only one of the priority tags is present, it is
used to select the queue. If none is present, the default queue AC_BE is chosen.
Note: If the wireless packets to be transmitted must include the L2 priority (send
to a WMM client from a WMM-enabled AP), the outbound L2 priority is copied
from the inbound L2 priority if available, or it is inferred from the L3 priority using
the above table if the L2 inbound priority is missing.
.
Queue Name Purpose
AC_VO Voice
AC_VI Video
AC_BK Background
AC_BE Best Effort
AC_TVO Turbo Voice
VNS type Packet Source Packet type L2 L3
Tunneled Wired Untagged No Yes
Branch Wired VLAN tagged Yes Yes
Branch Wired Untagged No Yes
Branch or Tunneled Wireless WMM Yes Yes