Users Guide

dcb pfc-total-buffer-size
Configure the total buffer size for PFC in kilobytes.
Syntax
dcb pfc-total—buffer—size KB
Parameters
KB Enter a number in the range of 0 to 7787.
Default The default is 6592KB.
Command Modes CONFIGURATION mode
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(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048–ON.
9.7(0.0) Introduced on the S6000-ON.
9.6(0.0) Introduced on the S5000.
9.3(0.0) Introduced on the S6000, S4810, and S4820T.
Usage
Information
Configure the maximum buffer available for PFC traffic. You can choose to increase or decrease the
buffer size that is allocated in the system by default. However, if you modify the PFC buffer size lower
than the previously configured size, the system determines whether this reduction in size is valid without
disrupting the existing configuration. In such a scenario, disable and re-enable DCB. For example, if you
modify the total buffer size as 4000 KB from the previous size of 5000 KB, an error message is displayed
that this reduction cannot be performed owing to existing system configuration because of queues that
are being currently in process.
The lossless queue limit per port is validated based on the dcb pfc-queues command. PFC queue
configuration identifies the maximum number of queues a port can support. Although the queue limit per
port is a baseline when dynamic buffering is enabled, the limit per port for queues depends on the
availability of the buffer.
Example
Dell(conf)# dcb pfc-total-buffer-size 5000
Dell(conf)# dcb pfc-total-buffer-size 4000
%ERROR: Total pfc buffer size configured cannot accommodate existing
buffer requirement in the system.
show running-config dcb-buffer-threshold
Displays the DCB buffer threshold details in the running configuration.
Syntax
show running—config dcb-buffer-threshold
Command Modes
EXEC
EXEC Privilege
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(1.0) Introduced on the Z9100–ON.
Data Center Bridging (DCB) 419