Working with VSCs
Quality of service (QoS)
4-24
Outgoing wireless traffic on the VSC is assigned to a queue based on the selected priority
mechanism. Traffic delivery is based on strict priority (per the WMM standard). Therefore, if
excessive traffic is present on queues 1 or 2, it will reduce the flow of traffic on queues 3 and
4.
Regardless of the priority mechanism that is selected:
Traffic that cannot be classified by a priority mechanism is assigned to queue 3.
SVP (SpectraLink Voice Protocol) traffic is always assigned to queue 1, except if you
select the VSC-based priority mechanism, in which case SVP traffic is assigned to the
configured queue.
Priority mechanisms
Priority mechanisms are used to classify traffic on the VSC and assign it to the appropriate
queue. The following mechanisms are available:
802.1p
This mechanism classifies traffic based on the value of the VLAN priority field present within
the VLAN header.
VSC-based priority
This mechanism is unique to HP. It enables you to assign a single priority level to all traffic on
a VSC. If you enable the VSC-based priority mechanism, it takes precedence regardless of the
priority mechanism supported by associated client stations. For example, if you set VSC-
based low priority, then all devices that connect to the VSC have their traffic set at this
priority, including SVP clients.
Queue 802.1p (VLAN priority field value)
16,7
24,5
30,2
41,3
Queue VSC-based priority value
1 Very-based Very High
2 Very-based High
3 Very-based Normal
4 Very-based Low
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