Glossary

Field Description
Name Name of the DCB buffer threshold profile
Buffer threshold
parameters
Buffer size allocated for the PFC priority queue and the priority of the queue
Example
Dell# show qos dcb buffer-threshold
Name : test1
Buffer threshold parameters:
pfc priority 0 buffer-size 40
pfc priority 3 buffer-size 50
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
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.7(0.0) Introduced on the S6000-ON and Z9500.
9.3(0.0) Introduced on the S6000 platform.
dcb pfc-total-buffer-size
Configure the total buffer size for PFC in kilobytes.
Syntax
dcb pfc-total—buffer—size buffer-size
Parameters
buffer-size 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 EMC
Networking OS Command Line Reference Guide.
Version Description
9.11(2.0P0) Default value is changed from 3088 KB to 2656 KB in the Z9100-ON and S6100-ON.
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S6100.
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.
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.
Data Center Bridging (DCB) 525