Dell C9010 Modular Chassis Switch EMC Networking Command-Line Reference Guide - Page 530

Usage Information Related Commands The following is a list of the Dell Networking OS version history for this command. Version Description 9.9(0.0) 9.6(0.0) 9.0.2.0 8.3.19.0 8.3.12.0 8.3.16.0 Introduced on the C9010. Removed from the S-series. Replaced by the dcb-map commands. Introduced on the S6000. Introduced on the S4820T. Introduced on the S4810. Introduced on the MXL 10/40GbE Switch IO Module. 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. 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 map to a single priority group with a PGID of 0 for DCBx negotiations. dcb-map- to configure PFC and ETS on Ethernet ports that support converged Ethernet traffic. 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. C9000 Series Syntax Parameters Defaults dcb-policy input stack-unit {all | stack-unit-id} stack-ports all dcbinput-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. stack-unit-id Enter the stack unit identification. dcb-input-policy- Enter the policy name for the DCB input policy. name none 530 Data Center Bridging (DCB)