Allied Telesis AT-2931SX - Manual (Page 55)

AT-29xxSX Series Gigabit Ethernet Network Adapters Installation Guide
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Figure 13. Advanced Tab
4. Change the operating properties as needed.
To change adapter operating property, click a property in the Property
list and then select a setting from Value list. See the following sections
for a description of the properties.
802.1p QOS
The 802.1p QOS property is a standard that enables Quality of Service
(QOS). It is responsible for the QOS provisions on the local segment, and
the avoidance of the "all packets are treated equally" issue, which falls
onto the hub or switch servicing segment. 802.1p QOS provides
prioritization of packets traversing a subnet. Thus, when the local segment
becomes congested and the hub or switch workload results in the delay
(dropping) of packets, those packets with flags that correspond to higher
priorities receive preferential treatment and are serviced before packets
with lower priorities.
To enable or disable the 802.1p QOS property, perform the following
procedure:
1. Start either a Windows Server 2003 system or a Windows XP system