Reference Guide

The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 8.3.16.0 Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
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.
Related
Commands
dcb-input — creates a DCB input policy.
pfc no-drop queues
Configure the port queues that still function as no-drop queues for lossless traffic.
S4820T
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 2-3. The range is
from 0 to 4.
Defaults No lossless queues are configured.
Command Modes INTERFACE
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 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-input 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.
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