Reference Guide

Command
History
Version Description
9.7(0.0) Introduced on the Z9500.
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. You must configure the shared buffer size to
be less than the total PFC buffer size. If the buffer size and DCB buffer threshold settings are applied on
one or more ports, a validation is performed to determine whether following condition is satisfied:
Shared-pfc-buffer-size <= (Total-pfc-buffer-size - Σpfc priority <> buffer-size on each port, priority).
If the preceding condition is not satisfied by the shared PFC buffer size value, the configuration is not
saved and a system logging message is generated as follows:
Dell(conf)#dcb pfc-shared-buffer-size 2000
%ERROR: pfc shared buffer size configured cannot accommodate existing
buffer requirement in the system.
Example
Dell(conf)#dcb pfc-shared-buffer-size 5000
dcb pfc-shared-buffer-size sfm all
Configure the maximum amount of shared buffer size for PFC packets on all sfm ports in kilobytes.
Syntax
dcb pfc-shared-buffer-size <value> sfm all
Parameters
KB Enter a number in the range from 0 to 11210.
Defaults The default is 3328KB for Z9500 platform.
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.7(0.0) Introduced on the Z9500.
Usage
Information
NOTE: Please note that the existing "dcb pfc-shared-total-size / pfc-shared-buffer-size <value>"
without any options is still applicable for Z9500. When executed, it configures the value to both
backplane and sfm units.
Example
dcb pfc-shared-buffer-size 3000 sfm all
dcb-buffer-threshold
Configure the profile name for the DCB buffer threshold.
Syntax
dcb buffer—threshold profile-name
Parameters
profile-name Enter the name of the profile, which can be a string of up to 32 characters in
length.
Default None
Command Modes CONFIGURATION mode
Data Center Bridging (DCB) 465