Deployment Guide

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.
Defaults None
Command Modes DCB MAP
Command
History
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.
Usage
Information
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.
dcb pfc-shared-buffer-size
Configure the maximum amount of shared buffer size for PFC packets in kilobytes.
Syntax
dcb pfc-shared—buffer—size buffer-size
Parameters
buffer-size Enter a number in the range of 0 to 3399.
494 Data Center Bridging (DCB)