WRR Scheduling Policy

The weighted round robin (WRR) scheduling algorithm ensures that the queues of different service levels are scheduled by turns so that each queue is served for certain time.

Navigation Path

For RTN NEs, in the NE Explorer, click the NE and choose Configuration > QoS Management > Policy Management > WRR Scheduling Policy.

Guideline

Port policies can apply the created WRR scheduling policy.

NOTICE:

If a WRR scheduling policy is applied to NEs, modifying or deleting the policy will cause configuration data loss on the U2000 Web LCT and NEs.Exercise caution when you perform this operation.

Background Information

NOTE:

Before creating a new WRR scheduling policy, check whether there are WRR scheduling policies available on NEs.
There is a default WRR scheduling policy existed on the U2000 Web LCT with the name WRR Default Scheduling and the ID 1. This default policy can not be modified or deleted.
The sum of scheduling weights for all service levels must be less than or equal to 100.
A higher scheduling weight indicates that the queue is served for a longer time and its packets enjoy higher QoS in transmission.

Parameters

**Table 1** Descriptions of WRR scheduling policy parameters
Field	Value	Description
Policy ID	1 to 128	Indicates the ID of a policy.
Assign Automatically	Checked, Unchecked	Specifies whether the ID is allocated automatically. NOTE: The automatically allocated IDs range from 1 to 128. Unused IDs are automatically allocated in ascending order.
Policy Name	Example: WRR Policy Name	Indicates the name of a policy.
CS7 Scheduling Weight	0 to 100	Indicates the scheduling weight of the CS7 service level. CS7: Indicates the highest forwarding priority for control packets on a network. Service levels in terms of forwarding priority are CS7, CS6, EF, AF4, AF3, AF2, AF1, and BE in descending order.
CS6 Scheduling Weight	0 to 100	Indicates the scheduling weight of the CS6 service level. CS6: Indicates the forwarding priority that is lower than CS7 for control packets on a network.
EF Scheduling Weight	0 to 100	Indicates the scheduling weight of the EF service level. EF: Indicates the expedited forwarding priority for low-delay services, for example, voice services.
AF4 Scheduling Weight	0 to 100	Indicates the scheduling weight of the AF4 service level. AF4: Indicates the assured forwarding priority 4.
AF3 Scheduling Weight	0 to 100	Indicates the scheduling weight of the AF3 service level. AF3: Indicates the assured forwarding priority 3.
AF2 Scheduling Weight	0 to 100	Indicates the scheduling weight of the AF2 service level. AF2: Indicates the assured forwarding priority 2.
AF1 Scheduling Weight	0 to 100	Indicates the scheduling weight of the AF1 service level. AF1: Indicates the assured forwarding priority 1.
BE Scheduling Weight	0 to 100	Indicates the scheduling weight of the BE service level. BE: Indicates the best effort forwarding priority for services without QoS guarantee on a network.