Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module FTOS Command Line Referen - Page 158

www.dell.com | support.dell.com Usage Information Create a DCB output policy to associate a priority group with an ETS output policy with scheduling and bandwidth configuration. You can apply a DCB output policy on multiple egress ports. When you apply an ETS output policy on an interface, ETS-configured scheduling and bandwidth allocation take precedence over any configured settings in QoS output policies. The ETS configuration associated with 802.1 priority traffic in a DCB output policy is used in DCBX negotiation with ETS peers. Related Commands dcb-policy output Apply the output policy. 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 Usage Information Version 8.3.16.1 Introduced on MXL 10/40GbE Switch IO Module 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 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. • 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. 158 | Data Center Bridging