To configure a 7210, 7250 and 1830 Port Scheduler policy

Purpose

For 7210 SAS and 1830 PSS NEs, a 7210, 7250 and 1830 Port Scheduler policy defines the scheduling mode (algorithm type) used to determine the forwarding priority for egress queues. When a weighted algorithm is chosen, the policy allows the configuration of relative weights for up to eight queues.

The policy affects access egress and network (or L2 uplink) egress traffic, and is assigned to ports in any mode. For policy assignment on 7210 SAS NEs, see To assign QoS policies to a 7210 SAS Ethernet port. For policy assignment on 7250 IXR NEs, see To configure Ethernet ports.

The NFM-P provides a default 7210, 7250 and 1830 Port Scheduler policy. The default policy is applied unless a user-configured port scheduler policy is explicitly assigned. The default policy specifies the Strict scheduler mode and cannot be modified. Strict priority means that queues are serviced based on their queue ID number, with higher numbers serviced first.

The 7210, 7250 and 1830 Port Scheduler policies are identified by the policy name and description; policy ID numbers are not used.

The 7210, 7250 and 1830 Port Scheduler policy is supported on the 7210 SAS-D, 7210 SAS-Dxp, 7210 SAS-E, 7210 SAS-M, 7210 SAS-S, 7210 SAS-Sx, and 7210 SAS-T.

Support for specific parameters and features varies, depending on the chassis type. Local definitions of a policy do not necessarily support all configurations in the global policy. See the NE documentation for more information.

Note: For 7210 SAS devices that do not support 7210, 7250 and 1830 Port Scheduler policies, egress scheduling is defined by the port bandwidth, and by user-configured settings in access egress and network queue policies, port properties, and SAP configuration. See Sample QoS configuration on the 7210 SAS in Chapter 70, Service management and QoS .

The maximum bandwidth (line rate) for a port is either system-defined, or is configured using port level egress rate limiting.

Steps
 
1 

Choose Policies→QoS→SROS QoS→Scheduler→ 7210, 7250 and 1830 Port Scheduler from the NFM-P main menu. The 7210, 7250 and 1830 Port Scheduler Policies form opens.

2 

Click Create or choose a policy and click Properties. The Port Scheduler, Global Policy (Create|Edit) form opens.

3 

Configure the required parameters on the General tab.

4 

If you selected a value of Strict or RoundRobin for the Mode parameter, go to Step 6 .

5 

If you selected a value of WeightedRoundRobin or WeightedDeficitRoundRobin for the Mode parameter, assign weight values to queues.

  1. Click on the Queue Weights tab.

  2. Configure the required parameters.

  3. Go to Step 6.

6 

Click OK to save the policy and close the form, or click Apply to save the policy. See To release and distribute a policy to distribute the policy to NEs.

End of steps