Version Description9.8(1.0) Introduced on the Z9100–ON.9.7(0.0) Introduced on the S6000-ON and Z9500.9.3(0.0) Introduced on the S4810 and S6000 platforms.Usage Information You can configure up to a maximum of four lossless (PFC) queues. By configuring four lossless queues, you canconfigure four different priorities and assign a particular priority to each application that your network is used toprocess. For example, you can assign a higher priority for time-sensitive applications and a lower priority for otherservices, such as file transfers. You can configure the amount of buffer space to be allocated for each priority andthe pause or resume thresholds for the buffer. This method of configuration enables you to effectively manage andadminister the behavior of lossless queues.Example Dell(conf)# dcb pfc-queues 4dcb {ets | pfc} enableEnable priority flow control or enhanced transmission selection on interface.Syntax dcb {ets | pfc} enable• To disable ETS on interface, use “no dcb ets enable” command.• To disable PFC on interface, use “no dcb pfc enable” command.Defaults EnableCommand Modes INTERFACECommand History This guide is platform-specific. For command information about other platforms, see the relevant Dell NetworkingOS Command Line Reference Guide.Version Description9.10(0.0) Introduced on the S6100.9.8(1.0) Introduced on the Z9100–ON.9.7(0.0) Introduced on the S6000-ON and Z9500.9.3 (0.1) Introduced on S6000, S4810, and S4820T.Usage Information PFC and ETS are enabled by default on the interfaces when DCB is globally enabled (refer to dcb enable). In somenetwork topology, you may want to disable PFC on an interface and apply link level flow control; Similarly you maywant to disable ETS on an interface and apply QoS bandwidth configurations.Limitations • “dcb-map” CLI on interface is mutually exclusive to “no dcb ets enable” and “no dcb pfc enable”.• “pfc priority” CLI is mutually exclusive to “no dcb pfc enable” command.508 Data Center Bridging (DCB)
