DES-1218/DES-1226 10/100/1000 Mbps Ethernet Switch User’s Guide
18
Priority Queues
This feature allows you to customize packet traffic handling to the particular needs of
your network. Configure this setting for packets passing through the port, using IEEE
802.1p priority tagging. These settings are universal, that is, they are for all ports on
the Switch. Four priority levels may be assigned with Queue 3 being the highest
priority queue, and Queue 0 being the lowest priority queue.
Note:
The settings you assign to the queues, numbers 0-7, represent the IEEE 802.1p
priority tag number. Do not confuse these settings with port numbers.
The highest
priority queue, Queue 3, should reserved for data in which latency can have
adverse affects on the function of an application, such as video or audio data, where
latency can produce distorted sounds and images.
Packets in the
lower priority queues
will be processed with less urgency.
See the discussion on
IEEE 802.1p
Priority
and
management of priority queues in Chapter 6.
Figure 5-2 shows how priority queues might be assigned. Access the Priority Queue
settings on the second page of the console management screen
Figure 5-2 Example of Priority Queue Assignments
