Alvarion BreezeACCESS VL System Manual page 230

Chapter 4 - Operation and Administration
Each one of these classifiers can be activated/deactivated. If more than one
classifier is activated, the priority of each packet will be determined by the
highest priority given to it by the active classifiers.
The Traffic Prioritization menu enables activating/deactivating each of these
classifiers, and configuring the applicable parameters for each classifier.
The Low Priority Traffic Minimum Percent parameter can be used to prevent
starvation of low priority traffic by ensuring that a certain number of low priority
packets is transmitted even at the expense of high priority traffic.
In addition, the Wireless Link Prioritization, which is a licensable feature, enables
to configure parameters that affect the prioritization of traffic in the wireless link
for packets with high/low priority from different units.
4.2.6.6.3.1 VLAN Priority Threshold
The VLAN Priority Threshold is applicable for Trunk and Hybrid Links only. It
enables defining the value of the VLAN Priority Threshold. If the VLAN Priority
field in a tagged frame is higher than the value of the VLAN Priority Threshold
parameter, the packet will be routed to the High queue. If the VLAN Priority field
is lower than or equal to this value, the packet will be transferred to the Low
queue (unless it is assigned a High priority by another classifier).
Valid values range from 0 to 7.
The default value is 7, which means that all packets get a low priority (equivalent
to disabling the VLAN-based classifier).
4.2.6.6.3.2 ToS Prioritization
The ToS Prioritization parameters enable defining prioritization in accordance
with either the 3 IP Precedence bits in the IP header in accordance with RFC 791,
or the 6 DSCP (Differentiated Services Code Point) bits in accordance with RFC
2474. The ToS Prioritization menu includes the following parameters:
4.2.6.6.3.2.1 ToS Prioritization Option
The ToS Prioritization Option defines whether ToS-based prioritization is enabled
or disabled. The following options are available:
Disable
Enable IP Precedence (RFC791) Prioritization
Enable DSCP (RFC2474) Prioritization
The default is Disable.
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BreezeACCESS VL System Manual