Version8.3.16.0Introduced on the MXL 10/40GbE Switch IO Module.UsageInformation NOTE: Please note that Dell Networking does not recommended to use thiscommand as it has been deprecated in the current 9.4.(0.0) release. A warningmessage appears when you try to run this command indicating that you haveto use the dcb-map commands in the future.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 inputpolicy, first disable link-level flow control. PFC is then automatically enabled onthe interface because an interface is by default PFC-enabled.• PFC still allows you to configure lossless queues on a port to ensure no-drophandling 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 globallyon the switch.• You already enabled link-level flow control. PFC and link-level flow controlcannot 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 youreconfigure the dot1p-queue mapping. This situation occurs when the new dot1p-queue assignment exceeds the maximum number (2) of lossless queues supportedglobally 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 inputpolicy or reapply the policy to an interface.If the priority group to QoS policy mapping configurations in the DCB outputprofile are not complete (for example, no priorities are mapped or only some of thepriorities are mapped), all eight priorities map to a single priority group with a PGIDof 0 for DCBx negotiations.RelatedCommandsdcb-input — creates a DCB input policy.dcb-policy input stack-unit stack-ports allApply the specified DCB input policy on all ports of the switch stack or a single stacked switch.S4810Syntax dcb-policy input stack-unit {all | stack-unit-id} stack-portsall dcb-input-policy-nameTo remove all DCB input policies applied to the stacked ports and rest the PFC toits default settings, use the no dcb-policy input stack-unit all command.Data Center Bridging (DCB) 519
