Deployment Guide

by default. Traffic may be interrupted due to an interface flap (going down and coming up) when you
reconfigure the lossless queues for no-drop priorities.
The default number of lossless queues supported on the switch is two. The maximum number of lossless
queues supported on the system is 4.
A PFC peer must support the configured priority traffic (as DCBX detects) to apply PFC.
show dcb
Displays the data center bridging status, the number of PFC-enabled ports, and the number of PFC-enabled queues.
Syntax
show dcb
Command Modes EXEC Privilege
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
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S6100-ON.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0) Introduced on the S3048-ON and S4048-ON.
9.7(0.0) Introduced on the S6000-ON and Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.3.16.0 Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
Specify a stack-unit number on the Master switch in a stack.
Example
DellEMC# show dcb
stack-unit 1 port-set 0
DCB Status : Enabled
PFC Port Count : 56 (current), 56 (configured)
PFC Queue Count : 2 (current), 2 (configured)
DellEMC#
show hardware pfc-nodrop-priority
View the packets drop count corresponding to the priority.
Syntax
show hardware pfc-nodrop-priority l2-dlf drops stack-unit stack-unit-number
port-set port-pipe
Parameters
stack-unit stack-
unit-number
Enter the keywords stack-unit and the stack unit number.
port-set port-
pipe
Enter the keywords port-set and port-pipe number. The port-pipe number is 0.
Command Modes
EXEC
EXEC Privilege
Data Center Bridging (DCB) 477