Dcb Pfc-Total-Buffer-Size - Dell Z9500 Reference Manual

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shared threshold weight

dcb pfc-total-buffer-size

Configure the total buffer size for PFC in kilobytes.

dcb pfc-total-buffer-size <value> linecard <0-2/all> port-set

<0-3/all>[no] dcb pfc-total-buffer-size <value> linecard <0-2/

all> port-set <0-3/all>

CONFIGURATION mode

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

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.

Data Center Bridging (DCB)

Weightage of the priorities on the

shared buffer size in the system.

Configure on all linecards.

Introduced on the Z9500.