Allied Telesis AT-FS970M Series - Manual (Page 1632)

Chapter 98: Quality of Service (QoS)
1632
Adding a CoS Value to a Class Map
Choosing the CoS value allows you to add the user priority level to a class
map as a matching criterion. You assign a CoS value according to the
type of traffic that you want to filter, such as voice traffic. Then you add the
CoS value to a class map with the MATCH COS command. For more
information about this command, see “MATCH COS” on page 1609.
Table 195 provides a summary of guidelines from the IEEE Standard
802.1d on applying priorities to traffic types.
The following example creates a class map, “cmap7,” which matches all
traffic with a user-priority level equal to 5:
Table 195. CoS Traffic Mapping Guidelines
User
Priority
Traffic Types
1 Background
2 Spare
0 Best Effort
3 Excellent Effort
4 Controlled Load
5 Video < 100 latency
and jitter
6 Voice < 10 latency and
jitter
7 Network Control
Table 196. Adding a CoS Value to a Class Map
Command Description
awplus> enable Enters the Privileged Executive mode from the
User Executive mode.
awplus# configure terminal Enters the Global Configuration mode.
awplus(config)# class-map cmap7 Creates a class map called cmap7 and enters the
Class Map mode.
awplus(config-cmap)# match cos 5 Adds the CoS value of 5 as a matching criteria to
class map “cmap7.”