Addendum
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 remove a DCB input policy, including the PFC configuration it contains, enter
the no dcb-input policy-name command in Interface Configuration mode.
Related
Commands
dcb-policy input — applies the input policy with the PFC configuration.
dcb-policy input
Apply the input policy with the PFC configuration to an ingress interface.
Syntax
dcb-policy input policy-name
To delete the input 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 9.3.0.0 Introduced on the FC Flex IO module installed in the M I/O
Aggregator and MXL 10/40GbE Switch
Usage
Information
If you apply an input policy with PFC disabled (no pfc mode on):
• 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 is displayed if:
• The PFC dot1p priorities result in more than two lossless port queues globally
on the switch.
• You already enabled link-level flow control. PFC and link-level flow control
cannot be enabled 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.
Data Center Bridging (DCB) for FC Flex IO Modules
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