Reference Guide

474 | Data Center Bridging
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Command
History
Usage
Information
If you configure PFC on a 40GbE port, count the 40GbE port as four PFC-enabled ports in the pfc-port
number you enter in the command syntax.
To achieve lossless PFC operation, the PFC port count and queue number used for the reserved buffer
size that is created must be greater than or equal to the buffer size required for PFC-enabled ports and
lossless queues on the switch.
You must reload the stack or a specified stack unit (use the
reload command in EXEC Privilege mode)
for the PFC buffer configuration to take effect.
Related
Commands
dcb stack-unit pfc-buffering pfc-port pfc-queues
Configure the PFC buffer for all port pipes in a specified stack unit by specifying the port-pipe number,
number of PFC-enabled ports, and number of configured lossless queues.
Syntax
dcb stack-unit stack-unit-id [port-set port-set-id] pfc-buffering pfc-ports {1-64} pfc-queues {1-2}
To remove the configuration for the PFC buffer on all port pipes in a specified stack unit, use the no
dcb stack-unit stack-unit-id [port-set port-set-id] pfc-buffering pfc-ports pfc-queues
command.
Parameters
Command Modes
CONFIGURATION
Command
History
Usage
Information
If you configure PFC on a 40GbE port, count the 40GbE port as four PFC-enabled ports in the pfc-port
number you enter in the command syntax.
To achieve lossless PFC operation, the PFC port count and queue number used for the reserved buffer
size that is created must be greater than or equal to the buffer size required for PFC-enabled ports and
lossless queues on the switch.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 8.3.16.0 Introduced on MXL 10/40GbE Switch IO Module
dcb stack-unit pfc-buffering pfc-port
pfc-queues
Configure the PFC buffer for all port pipes in a specified stack
unit.
stack-unit-id
Enter the stack-unit identification.
Range:0 to 5.
port-set
Enter the port-set identification.
pfc-ports {1-65}
Enter the pfc-ports.
Range:1 to 64.
pfc-queues {1-2}
Enter the pfc-queue number.
Range:1 to 2.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 8.3.16.0 Introduced on MXL 10/40GbE Switch IO Module