3Com WX3000 QoS Configuration, Flow-based Traffic Accounting, Burst, Traffic mirroring

Table 1-7		Queue-scheduling sequence of SDWRR
	Scheduling			Queue-scheduling sequence	Description
	algorithm
	WRR		0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1		0 indicates packets in
					queue0
	SDWRR		0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0		1 indicates packets in
					queue1

Flow-based Traffic Accounting

The function of flow-based traffic accounting is to use ACL rules in traffic classification and perform traffic accounting on the packets matching the ACL rules. You can get the statistics of the packets you are interested in through this function.

Burst

The Burst function can provide better packet cache function and traffic forwarding performance. It is suitable for networks where

z

z

Large amount of broadcast/multicast packets and large burst traffic exist.

Packets of high-rate links are forwarded to low-rate links or packets of multiple links with the equal rates are forwarded to a single link that is of the same rate as that of the incoming links.

Although the burst function helps reduce the packet loss ratio and improve packet processing capability in the networks mentioned above, it may affect QoS performance. So, use this function with caution.

Traffic mirroring

Traffic mirroring identifies traffic using ACLs and duplicates the matched packets to the destination port. For information about port mirroring, refer to the Mirroring module of this manual.

QoS Configuration

QoS Configuration Task List

Complete the following tasks to configure QoS:

Task		Remarks
Configuring Priority Trust Mode		Optional
Configuring Priority Mapping		Optional
Setting the Priority of Protocol Packets		Optional
Marking Packet Priority		Optional
Configuring Traffic Policing		Optional
Configuring Traffic Shaping		Optional
Configuring Traffic Redirecting		Optional
Configuring VLAN Mapping		Optional
Configuring Queue Scheduling		Optional
Collecting/Clearing Traffic Statistics		Optional
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