DELL 9.8(0.0) User Manual

Command
History

Version

Description

9.7(0.0)

Introduced on the S6000-ON.

9.3(0.0)

Introduced on the S6000 platform.

Usage
Information

Configure the maximum buffer available for PFC traffic. You can choose to
increase or decrease the buffer size that is currently allocated in the system by
default. However, if you modify the PFC buffer size to be lower than the previously
configured PFC buffer size, the system determines whether this reduction in size is
valid without disrupting the existing configuration. In such a scenario, you must
disable and re-enable DCB. For example, if you modify the total buffer size to be
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 processed.

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 buffer-threshold

Command
Modes

EXEC

EXEC Privilege