CLI Guide

Usage
Information
The dcb-map stack-unit all stack-ports all command overwrites any previous DCB maps
applied to stack ports.
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.
Default The default is 1040KB.
Command Modes CONFIGURATION mode
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
9.11(2.0P0) The default value is changed to 1040 KB for the Z9100–ON and S6100–ON.
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S6100.
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.
9.6(0.0) Introduced on the S5000.
9.3(0.0) Introduced on the S4810, S4820T, and S6000 platforms.
Usage
Information
Configure the maximum shared buffer available for PFC traffic. You can choose to increase or decrease
the shared buffer that is allocated in the system by default. Configure the shared buffer size less than
the total PFC buffer size. If the shared buffer size is more than the total PFC buffer size value, the
configuration is not saved and a system logging message is generated.
DellEMC(conf)#dcb pfc-shared-buffer-size 3000
% Error: Shared buffer size cannot be greater than the the available
buffer in the system
DellEMC(conf)#
Enter a smaller value for the shared buffer size or increase the total buffer size appropriately by using the
dcb pfc-total- buffer-size command.
Example
DellEMC(conf)#dcb pfc-shared-buffer-size 800
dcb pfc-headroom-buffer-size
Configure a shared head room pool limit, which is the threshold value for the shared head room pool size.
Syntax
dcb pfc-headroom-buffer-size buffer-size
To undo the shared head room pool limit configuration, use the no dcb pfc-headroom-buffer-
size buffer-size command.
Parameters
buffer-size Enter the maximum buffer value that you want to allocate for the shared head
room pool. Each lossless Priority or Priority Group can use up to the peak head
room configured for that particular priority from the shared head room configured.
The range is from 0 to 3399.
Data Center Bridging (DCB) 497