Users 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
Use the dcb-map command to congure 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 congure PFC and ETS trac handling for each
priority group in a DCB map.
You can enable PFC on a maximum of two priority queues.
If you congure more than one priority group as strict priority, the higher numbered priority queue is given
preference when scheduling data trac.
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 conguration 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 congure 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-buer-size
Congure the maximum amount of shared buer size for PFC packets in kilobytes.
Syntax
dcb pfc-shared—buffer—size KB
Parameters
KB Enter a number in the range of 0 to4096.
Default The default is 208KB.
Command Modes CONFIGURATION mode
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.
9.8(0.0) Introduced on the S4048-ON.
9.7(0.0) Introduced on the S6000-ON and Z9500.
Data Center Bridging (DCB) 443