Users Guide

Command Modes DCB MAP
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.8(1.0) Introduced on the Z9100–ON.
9.7(0.0) Introduced on the S6000-ON and Z9500.
9.3(0.0) Introduced on the S4810, S6000 platforms.
Usage Information
PFC and ETS settings are not pre-congured on Ethernet ports. You must use the dcb-map command to
congure dierent groups of 802.1p priorities with PFC and ETS settings.
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 trac:
• Priority group 0 contains trac with dot1p priorities 0, 1, and 2.
• Priority group 1 contains trac with dot1p priority 3.
• Priority group 2 contains trac with dot1p priority 4.
• Priority group 4 contains trac with dot1p priority 5, 6, and 7.
To remove a priority-pgid conguration from a DCB map, enter the no priority-pgid command.
For PFC enabled priorities, it is recommended to map single priority per Priority group.
priority-group bandwidth pfc
Congure the ETS bandwidth allocation and PFC mode used to manage port trac in an 802.1p priority group.
Syntax
priority-group group-num {bandwidth percentage| strict-priority} [[committed |
peak ] | [peak | committed] {<0-10000>} [<0-10000>]] 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%.
strict-priority Congure the priority-group trac to be handled with strict priority scheduling. Strict-
priority trac is serviced rst, before bandwidth allocated to other priority groups is made
available.
pfc {on | o} Congure whether priority-based ow control is enabled (on) or disabled (o) for port
trac in the priority group.
Defaults None
Command Modes DCB MAP
496 Data Center Bridging (DCB)