Users Guide

pfc priority 3 buffer-size 50
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.7(0.0) Introduced on the S6000-ON and Z9500.
9.3(0.0) Introduced on the S6000 platform.
dcb pfc-total-buer-size
Congure the total buer size for PFC in kilobytes.
Syntax
dcb pfc-total—buffer—size buffer-size
Parameters
buer-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-specic. 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
Congure the maximum buer available for PFC trac. You can choose to increase or decrease the buer size that
is allocated in the system by default. However, if you modify the PFC buer size lower than the previously
congured size, the system determines whether this reduction in size is valid without disrupting the existing
conguration. 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 conguration
identies the maximum number of queues a port can support. Although the queue limit per port is a baseline when
dynamic buering is enabled, the limit per port for queues depends on the availability of the buer.
Example
DellEMC(conf)#dcb pfc-total-buffer-size 2800
DellEMC(conf)#
DellEMC#show dcb
DCB Status: Enabled, PFC Queue Count: 2
Data Center Bridging (DCB) 593