Dell Command Line Reference Guide for the S4048–ON System 9.14.2.8

priority-group group-num

Enter the keyword priority-group followed by the number of an 802.1p priority group. Use the priority-pgid command to create the priority groups in a DCB map.

bandwidth percentage

Enter the keyword bandwidth followed by a bandwidth percentage allocated to the priority group. The range of valid values is 1 to 100. The sum of all allocated bandwidth percentages in priority groups in a DCB map must be 100%.

strict-priority

Configure the priority-group traffic to be handled with strict priority scheduling. Strict-priority traffic is serviced first, before bandwidth allocated to other priority groups is made available.

pfc {on | off}

Configure whether priority-based flow control is enabled (on) or disabled (off) for port traffic in the priority group.

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version

Description

9.10(0.1)

Introduced on the S6010-ON and S4048T-ON.

9.10(0.0)

Introduced on the S6100-ON.

9.8(1.0)

Introduced on the Z9100–ON.

9.8(0.0)

Introduced on the S3048-ON and S4048-ON.

9.7(0.0)

Introduced on the S6000-ON and Z9500.

9.6(0.0)

Added support to configure peak and committed rate on the S6000 platform.

9.3(0.0)

Introduced on the S4810, S6000 platforms.

Use the dcb-map command to configure priority groups with PFC and/or ETS settings and apply them to Ethernet interfaces.

Use the priority-pgid command to map 802.1p priorities to a priority group. You can assign each 802.1p priority to only one priority group. A priority group consists of 802.1p priority values that are grouped together for similar bandwidth allocation and scheduling, and that share latency and loss requirements. All 802.1p priorities mapped to the same queue must be in the same priority group.

Repeat the priority-group bandwidth pfc command to configure PFC and ETS traffic handling for each priority group in a DCB map.

You can enable PFC on a maximum of two priority queues.

If you configure more than one priority group as strict priority, the higher numbered priority queue is given preference when scheduling data traffic.

If a priority group does not use its allocated bandwidth, the unused bandwidth is made available to other priority groups.

To remove a priority-group configuration in a DCB map, enter the no priority-group bandwidth pfc command.

By default, equal bandwidth is assigned to each dot1p priority in a priority group. Use the bandwidth parameter to configure the bandwidth percentage assigned to a priority group. The sum of the bandwidth allocated to all priority groups in a DCB map must be 100% of the bandwidth on the link. You must allocate at least 1% of the total port bandwidth to each priority group.