3Com 10014298 manual Entering QoS View, Configuring the Traffic Limit

164CHAPTER 7: QOS/ OPERATION

Configuring the Priority for Queue Scheduling

You can use the following command to configure which priority is used for queue scheduling.

Perform the following configuration in system view.

Table 175 Configuring the Priority for Queue Scheduling

Operation	Command
Configure the priority for queue scheduling	priority-trust { dscp ip-precedence cos
	local-precedence }

By default, the switch chooses the local preference as the basic priority.

Entering QoS View

You should run most QoS configurations in QoS view.

Perform the following configuration in Ethernet interface view.

Table 176 Entering QoS View

Operation	Command
Enter QoS view	qos

Different I/O modules may support different QoS functions and you can view the

QoS configuration items available for the current interface unit by keying in “?” in

QoS view.

Only the 20-Port 10/100/1000BASE-T and 20-Port 1000BASE-X-SFP I/O modules support setting of line rate and packet redirection.

Configuring the Traffic Limit

Traffic limiting establishes actions to deal with the traffic flow that exceeds the threshold. These actions can include discarding packets or lowering priority.

You must define the corresponding ACL before performing this configuration task.

Perform the following configuration in QoS view.

Table 177 Configuring the Traffic Limit

Operation	Command
Configure the flow-based rate limit	traffic-limit { inbound outbound } {
	ip-group{ acl-number acl-name } [ rule rule
	] link-group{ acl-number acl-name } [ rule
	rule ] } target-rate [ exceed action ]

Cancel the configuration of the flow-based rate limit

undo traffic-limit { inbound outbound } { ip-group { acl-numberacl-name} [ rule rule ] link-group { acl-numberacl-name} [ rule rule ] }

For details about the command, see the Switch 7750 Command Reference Guide.