QoS Commands 395
cos-queue strict
Use the cos-queue strict command in either Global Configuration mode or Interface 
Configuration mode to activate the strict priority scheduler mode for each specified queue. To 
restore the default weighted scheduler mode for each specified queue, use the no form of this 
command.
Syntax
cos-queue strict {
queue-id-1
} [{
queue-id-2
} … {
queue-id-n
}]
no cos-queue strict {
queue-id-1
} [{
queue-id-2
} … {
queue-id-n
}]
•
queue-id-1
 — Specifies the queue ID for which you are activating the strict priority scheduler. 
You can specify a queue ID for as many queues as you have (queue-id 1 through queue-id-n). 
(Range: 0–6)
Default Configuration
This command has no default configuration.
Command Mode
Global Configuration mode or Interface Configuration (Ethernet, Port-channel) mode
User Guidelines
This command has no user guidelines.
Example
The following example displays how to activate the strict priority scheduler mode for two 
queues.
console(config)#cos-queue strict 1 2
The following example displays how to activate the strict priority scheduler mode for three 
queues.
console(config)#cos-queue strict 1 2 4
diffserv
Use the diffserv command in Global Configuration mode to set the DiffServ operational mode 
to active. While disabled, the DiffServ configuration is retained and can be changed, but it is 
not activated. When enabled, DiffServ services are activated. To set the DiffServ operational 
mode to inactive, use the no form of this command.