Administrator Guide
Version Description
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
NOTE: Please note that Dell Networking does not recommended to use this command as it has
been deprecated in the current 9.4.(0.0) release. A warning message appears when you try to run
this command indicating that you have to use the dcb-map commands in the future.
By applying a DCB input policy with PFC enabled, you enable PFC operation on ingress port traffic. To achieve
complete lossless handling of traffic, also enable PFC on all DCB egress ports or configure the dot1p priority-
queue assignment of PFC priorities to lossless queues (refer to pfc no-drop queues).
To disable PFC operation on an interface, enter the no pfc mode on command in DCB Input Policy
Configuration mode. PFC is enabled and disabled as global DCB operation is enabled (dcb-enable) or disabled
(no dcb-enable).
You cannot enable PFC and link-level flow control at the same time on an interface.
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 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
• 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.
478 Data Center Bridging (DCB)