priority scheduling (strict-priority command). The priority group for strict-priority scheduling(scheduler strict command.Configure a DCBx OperationDCB devices use data center bridging exchange protocol (DCBx) to exchange configuration information withdirectly connected peers using the link layer discovery protocol (LLDP) protocol.DCBx can detect the misconfiguration of a peer DCB device, and optionally, configure peer DCB devices withDCB feature settings to ensure consistent operation in a data center network.DCBx is a prerequisite for using DCB features, such as priority-based flow control (PFC) and enhanced trafficselection (ETS), to exchange link-level configurations in a converged Ethernet environment. DCBx is alsodeployed in topologies that support lossless operation for FCoE or iSCSI traffic. In these scenarios, all networkdevices are DCBx-enabled (DCBx is enabled end-to-end).• Configure Enhanced Transmission SelectionDCBx supports the following versions: CIN, CEE, and IEEE2.5.DCBx is not supported on PE ports and C9010 cascade ports (member ports in the C9010 LAG created toconnect to an attached C1048P).Prerequisite: For DCBx, enable LLDP on all DCB devices.DCBx OperationDCBx performs the following operations:• Discovers DCB configuration (such as PFC and ETS) in a peer device.• Detects DCB mis-configuration in a peer device; that is, when DCB features are not compatiblyconfigured on a peer device and the local switch. Mis-configuration detection is feature-specificbecause some DCB features support asymmetric configuration.• Reconfigures a peer device with the DCB configuration from its configuration source if the peer deviceis willing to accept configuration.• Accepts the DCB configuration from a peer if a DCBx port is in “willing” mode to accept a peer’s DCBsettings and then internally propagates the received DCB configuration to its peer ports.DCBx Port RolesTo enable the auto-configuration of DCBx-enabled ports and propagate DCB configurations learned frompeer DCBx devices internally to other switch ports, use the following DCBx port roles.Auto-upstream The port advertises its own configuration to DCBx peers and is willing to receive peerconfiguration. The port also propagates its configuration to other ports on the switch.The first auto-upstream that is capable of receiving a peer configuration is elected asthe configuration source. The elected configuration source then internally propagatesData Center Bridging (DCB) 310
