3Com 10014298 manual Relabeling the Priority Level, Configuring the RED Operation

166CHAPTER 7: QOS/ OPERATION

Only the 20-Port 10/100/1000BASE-T and 20-Port 1000BASE-X-SFP I/O modules support this configuration.

Relabeling the Priority Level

Relabeling the priority level creates a policy to tag the priority of the packets so they match the ACL. The new priority can be filled in the priority field of the packet header.

Perform the following configuration in QoS view.

Table 181 Relabeling the Priority Level

Operation	Command
Relabel traffic priority	traffic-priority { inbound outbound } {
	ip-group{ acl-number acl-name } [ rule rule
	] link-group{ acl-number acl-name } [ rule
	rule ] } { { dscp dscp-valueip-precedence
	pre-value ] [ local-precedencepre-value }* }
Cancel the traffic priority marking	undo traffic-priority { inbound outbound
	} { ip-group{ acl-number acl-name } [ rule
	rule ] link-group{ acl-number acl-name } [
	rule rule ] }

The Switch 7750 tags the packets with IP precedence (specified by ip-precedencein the traffic-prioritycommand), or DSCP (specified by dscp in the traffic-prioritycommand). You can tag the packets with different priorities as required on QoS policy.

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

Configuring the RED Operation

The RED operation monitors and processes, packet forwarding to prevent network congestion.

The 20-Port 10/100/1000BASE-T and 20-Port 1000BASE-X-SFP I/O modules do not support this configuration.

Perform the following configuration in QoS view.

Table 182 Configure RED Operation

Operation	Command
Configure RED Operation	traffic-red outbound { ip-group {
	acl-number acl-name } [ rule rule ]
	link-group{ acl-number acl-name } [ rule
	rule ] } qstart qstop probability
Cancel the configuration of RED Operation	undo traffic-red outbound { ip-group {
	acl-number acl-name } [ rule rule ]
	link-group{ acl-number acl-name } [ rule
	rule ] }

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