CLI Guide

%ERROR: pfc shared buffer size configured cannot accommodate
existing buffer requirement in the system.
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
Dell(conf)#dcb pfc-shared-buffer-size 5000
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
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.9(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
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.
d.
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Data Center Bridging (DCB)