Administrator Guide

Using the priority-pgid command, you assign each 802.1p priority to 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. For example, the priority-pgid 0 0 0 1 2 4 4 4 command creates the following groups
of 802.1p priority traffic:
• Priority group 0 contains traffic with dot1p priorities 0, 1, and 2.
• Priority group 1 contains traffic with dot1p priority 3.
• Priority group 2 contains traffic with dot1p priority 4.
• Priority group 4 contains traffic with dot1p priority 5, 6, and 7.
To remove a priority-pgid configuration from a DCB map, enter the no priority-pgid command.
For PFC enabled priorities, it is recommended to map single priority per Priority group.
pfc mode on
Enable the PFC configuration on the port so that the priorities are included in DCBX negotiation with peer PFC devices.
Syntax
pfc mode on
To disable the PFC configuration, use the no pfc mode on command.
Defaults PFC mode is on.
Command Modes DCB MAP
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.8(0.0) Introduced on the S3048-ON and S4048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the MXL 10/40GbE Switch with the FC Flex IO module.
Usage Information
By applying a DCB input policy with PFC enabled, you enable PFC operation on ingress port traffic. To achieve
complete lossless handling of traffic, also enable PFC on all DCB egress ports or configure the dot1p priority-
queue assignment of PFC priorities to lossless queues (refer to pfc no-drop queues).
To disable PFC operation on an interface, enter the no pfc mode on command in DCB Input Policy
Configuration mode. PFC is enabled and disabled as global DCB operation is enabled (dcb-enable) or disabled
(
no dcb-enable).
You cannot enable PFC and link-level flow control at the same time on an interface.
NOTE: We do not recommended to use this command as it has been deprecated in the current
9.4(0.0) release. A warning message appears when you try to run this command indicating that
you have to use the dcb-map commands in the future.
priority-group bandwidth pfc
Configure the ETS bandwidth allocation and PFC mode used to manage port traffic in an 802.1p priority group.
Syntax
priority-group group-num {bandwidth percentage| strict-priority} pfc {on | off}
Parameters
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%.
502 Data Center Bridging (DCB)