Administrator Guide
dcb-policy input
To apply the input policy with the PFC configuration to an ingress interface.
Syntax
dcb-policy input policy-name
To delete the DCB policy, use the no dcb-policy input command.
Parameters
policy-name Enter the input policy name with the PFC configuration to an
ingress interface.
Defaults None
Command
Modes
• INTERFACE
Command
History
Version 9.2(0.0) Supported on the M I/O Aggregator.
Usage
Information
This command is supported in Programmable-Mux (PMUX) mode only.
If you apply an input policy with PFC disabled (no pfc mode):
• You can enable link-level flow control on the interface. To delete the input
policy, first disable link-level flow control. PFC is then automatically enabled on
the interface because an interface is by default PFC-enabled.
• PFC still allows you to configure lossless queues on a port to ensure no-drop
handling of lossless traffic.
When you apply an input policy to an interface, an error message displays if:
• The PFC dot1p priorities result in more than two lossless port queues globally
on the switch.
• You already enabled link-level flow control. You cannot enable PFC and link-
level flow control at the same time on an interface.
In a switch stack, configure all stacked ports with the same PFC configuration.
A DCB input policy for PFC applied to an interface may become invalid if you
reconfigure the dot1p-queue mapping. This situation occurs when the new dot1p-
queue assignment exceeds the maximum number (2) of lossless queues supported
globally on the switch. In this case, all PFC configurations received from PFC-
enabled peers are removed and resynchronized with the peer devices.
Traffic may be interrupted when you reconfigure PFC no-drop priorities in an input
policy or reapply the policy to an interface.
If the priority group to QoS policy mapping configurations in the DCB output
profile are not complete (for example, no priorities are mapped or only some of the
priorities are mapped), all eight priorities are mapped to a single priority group with
a PGID of 0 for DCBx negotiations.
Data Center Bridging (DCB)
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