C
ONFIGURING
THE
S
WITCH
3-174Mapping CoS Values to Egress Queues
This switch processes Class of Service (CoS) priority tagged traffic by
using eight priority queues for each port, with service schedules based on
strict or Weighted Round Robin (WRR). Up to eight separate traffic
priorities are defined in IEEE 802.1p. The default priority levels are
assigned according to recommendations in the IEEE 802.1p standard as
shown in the following table.
The priority levels recommended in the IEEE 802.1p standard for various
network applications are shown in the following table. However, you can
map the priority levels to the switch’s output queues in any way that
benefits application traffic for your own network.
Command Attributes
•Priority – CoS value. (Range: 0-7, where 7 is the highest priority)
•Traffic Class* – Output queue buffer. (Range: 0-7, where 7 is the
highest CoS priority queue)
* CLI shows Queue ID.
Web – Click Priority, Traffic Classes. Mark an interface and click Select to
display the current mapping of CoS values to output queues. Assign
Queue 01234567
Priority 20134567
Priority Level Traffic Type
1Background
2(Spare)
0 (default) Best Effort
3 Excellent Effort
4 Controlled Load
5 Video, less than 100 milliseconds latency and jitter
6 Voice, less than 10 milliseconds latency and jitter
7 Network Control