• 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-enabledpeers 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 output profile arenot complete (for example, no priorities are mapped or only some of the priorities aremapped), all eight priorities map to a single priority group with a PGID of 0 for DCBxnegotiations.RelatedCommandsdcb-map— to configure PFC and ETS on Ethernet ports that support convergedEthernet traffic.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.C9000 SeriesSyntax dcb-policy input stack-unit {all | stack-unit-id} stack-ports alldcb-input-policy-nameTo remove all DCB input policies applied to the stacked ports and rest the PFC to itsdefault settings, use the no dcb-policy input stack-unit all command.To remove only the DCB input policies applied to the specified switch, use the nodcb-policy input stack-unit command.Parameters stack-unit-id Enter the stack unit identification.dcb-input-policy-nameEnter the policy name for the DCB input policy.Defaults noneCommand Modes CONFIGURATIONCommand History This guide is platform-specific. For command information about other platforms, referto the relevant Dell Networking OS Command Line Reference Guide.Data Center Bridging (DCB) 685
