hwc_vnsconfiguration.fm
A31003-W1040-U101-1-7619, July 2006 DRAFT
HiPath Wireless Controller, Access Points and Convergence Software V4.0, C10/C100/C1000 User Guide
181
Virtual Network configuration
Configuring Quality of Service (QoS)
Both Layer 3 tagging (DSCP) and Layer 2 (802.11d) 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.
Table 15 Traffic prioritization
The mapping of the tagged packets to the queues in the AP are as follows:
Table 16 Tagged packets mapping – Where xxx can be either 1 or 0.
The following 6 options are available for configuring the QoS behavior of the VNS:
● Best Effort – WMM is disabled and all traffic to and from the wireless client device will be
handled as best effort traffic and will use the queue designated as best effort.
VNS type Packet type L2 L3
Tunneled Untagged No Yes
Branch VLAN tagged Yes Yes
Branch Untagged No Yes
Branch or Tunneled WMM Yes Yes
Branch or Tunneled non-WMM No Yes
DSCP bin 802.1d WMM
111xxx 7 AC_VO
110xxx 6 AC_VO
101xxx 5 AC_VI
100xxx 4 AC_VI
011xxx 3 AC_BE
010xxx 2 AC_BK
001xxx 1 AC_BK
000xxx 0 AC_BE
>
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.
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