Users Guide

pfc no-drop queues
Configure the port queues that still function as no-drop queues for lossless traffic.
Syntax
pfc no-drop queues queue-range
To remove the no-drop port queues, use the no pfc no-drop queues command.
Parameters
queue-range Enter the queue range. Separate the queue values with a comma; specify a priority
range with a dash; for example, pfc no-drop queues 1,3 or pfc no-drop
queues 7 or pfc no-drop queues 0,7. The range is from 0 to 3.
Defaults No lossless queues are configured.
Command Modes INTERFACE
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(0.0) Introduced on the S6100–ON.
9.8(1.0) Introduced on the Z9100–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
● When you configure lossless queues on an interface, PFC priority configuration is not allowed on the
dcb-map profile applied on the interface.
● The maximum number of lossless queues globally supported on the switch is two.
The following lists the dot1p priority-queue assignments.
dot1p Value in
the Incoming
Frame
Description heading
0 1
1 0
2 2
3 3
4 4
5 5
6 6
7 7
● Before configuring the port queues to function as no-drop queues, you must first apply the dcb-map
map with pfc mode off. To apply the dcb-map with pfc mode off, use the following commands: dcb-
map pfcoff and no pfc mode on.
pfc priority
Configure the CoS traffic to be stopped for the specified delay.
Syntax
pfc priority priority-range
392 Data Center Bridging (DCB)