Dell Force10 S4820T FTOS Command Reference Guide - Page 471
dcb-policy input stack-unit stack-ports all
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Command History Version 8.3.12.0 Version 8.3.16.0 Introduced on the S4810. Introduced on MXL 10/40GbE Switch IO Module Usage Information If you apply an input policy with PFC disabled (no pfc mode on): • Link-level flow control can be enabled on the interface. To delete the input policy, you must first disable link-level flow control. PFC is then enabled automatically 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. • Link-level flow control is already enabled. PFC and link-level flow control cannot be enabled at the same time on an interface. In a switch stack, you must configure all stacked ports with the same PFC configuration. A DCB input policy for PFC applied to an interface may become invalid if the dot1p-queue mapping is reconfigured. 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 re-synchronized with the peer devices. Traffic may be interrupted when you reconfigure PFC no-drop priorities in an input policy or re-apply the policy to an interface. Related Commands dcb-input Create a DCB input policy. dcb-policy input stack-unit stack-ports all Apply the specified DCB input policy on all ports of the switch stack or a single stacked switch. Syntax dcb-policy input stack-unit {all | stack-unit-id} stack-ports all dcb-input-policy-name To remove all DCB input policies applied to the stacked ports and rest the PFC to its default 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 no dcb-policy input stack-unit command. Parameters stack-unit-id Enter the stack unit identification. dcb-input-policy-name Enter the policy name for the DCB input policy. Defaults None Command Modes CONFIGURATION Data Center Bridging | 471