Board Shaping Management

This topic describes the parameters of the board shaping management.

Navigation Path

In the NE Explorer, select an EMS4 board and then choose Configuration > QoS Management > Board Shaping Management from the Function Tree.

Parameters

Field	Value	Description
Board	Slot-board	Displays the board information.
Queue Scheduling Mode	SP, WRR Default value: WRR	SP indicates the absolute priority grooming mode. In this mode, the service with higher priority preempts the resources of the service with lower priority. In a network congestion, no packet loss occurs in the service with higher priority, but the service with lower priority may be interrupted. Compared with the SP mode, the weight is added in the WRR mode. The weight can be 8, 4, 2, or 1. Four priorities are supported at the board level. In a descending sequence, they are 8, 4, 2, and 1. The bandwidth resources are allocated to services according to their priorities, that is, the weights 8:4:2:1. In a network congestion, the service with higher priority occupies most bandwidth resources, and the service with lower priority is not interrupted. For example, 8/9 of the bandwidth resources are allocated to the service with highest priority and 1/9 of the bandwidth resources are allocated to the service with lowest priority. NOTE: The weight is applicable to boards. That is, all egress queues are groomed according to the weights.

Field

Value

Description

Board

Slot-board

Displays the board information.

Queue Scheduling Mode

SP, WRR

Default value: WRR

SP indicates the absolute priority grooming mode.
In this mode, the service with higher priority preempts the resources of the service with lower priority.

In a network congestion, no packet loss occurs in the service with higher priority, but the service with lower priority may be interrupted.
Compared with the SP mode, the weight is added in the WRR mode. The weight can be 8, 4, 2, or 1.
Four priorities are supported at the board level. In a descending sequence, they are 8, 4, 2, and 1. The bandwidth resources are allocated to services according to their priorities, that is, the weights 8:4:2:1.

In a network congestion, the service with higher priority occupies most bandwidth resources, and the service with lower priority is not interrupted.

For example, 8/9 of the bandwidth resources are allocated to the service with highest priority and 1/9 of the bandwidth resources are allocated to the service with lowest priority.

NOTE:
The weight is applicable to boards. That is, all egress queues are groomed according to the weights.