Dell MX9116n EMC SmartFabric OS10 User Guide - Page 1227

• PFC configuration and application-priority configuration • ETS configuration and ETS recommendation This sample DCBX topology shows two 40GbE ports on a switch that are configured as DCBX auto-upstream ports and used as uplinks to top-of-rack (ToR) switches. The ToR switches are part of a fiber channel storage network. DCBX configuration notes • To exchange link-level configurations in a converged network, DCBX is a prerequisite for using DCB features, such as PFC and ETS. DCBX is also deployed in topologies that support lossless operation for FCoE or iSCSI traffic. In these scenarios, all network devices must be DCBX-enabled so that DCBX is enabled end-to-end. • DCBX uses LLDP to advertise and automatically negotiate the administrative state and PFC/ETS configuration with directly connected DCB peers. If you disable LLDP on an interface, DCBX cannot run. Enable LLDP on all DCBX ports, • DCBX is disabled at a global level by default. Enable DCBX globally on a switch to activate the exchange of DCBX TLV messages with PFC, ETS, and iSCSI configurations. • DCBX is enabled by default on OS10 interfaces. You can manually reconfigure DCBX settings on a per-interface basis. For example, you can disable DCBX on an interface using the no lldp tlv-select dcbxp command or change the DCBX version using the dcbx version command. • For DCBX to be operational, DCBX must be enabled at both the global and interface levels. If the show lldp dcbx interface command returns the message DCBX feature not enabled, DCBX is not enabled at both levels. • OS10 supports DCBX versions CEE and IEEE2.5. • By default, DCBX advertises all TLVs-PFC, ETS Recommendation, ETS Configuration, DCBXP, and basic TLVs. • A DCBX-enabled port operates in a manual role by default. The port operates only with user-configured settings and does not autoconfigure with DCB settings that are received from a DCBX peer. When you enable DCBX, the port advertises its PFC and ETS configurations to peer devices but does not accept external, or propagate internal, DCB configurations. • DCBX detects misconfiguration on a peer device when DCB features are not compatibly configured with the local switch. Misconfiguration detection is feature-specific because some DCB features support asymmetric (nonidentical) configurations. Configure DCBX DCBX allows data center devices to advertise and exchange configuration settings with directly connected peers using LLDP. LLDP is enabled by default. To ensure the consistent and efficient operation of a converged data center network, DCBX detects peer misconfiguration. DCBX is disabled at a global level and enabled at an interface level by default. For DCBX to be operational, DCBX must be enabled at both the global and interface levels. You can manually reconfigure DCBX settings or disable DCBX on a per-interface basis. Converged data center services 1227