Applying a DCB Map on a PortWhen you apply a DCB map with PFC enabled on a switch interface, a memory buffer for PFC-enabledpriority traffic is automatically allocated. The buffer size is allocated according to the number of PFC-enabled priorities in the assigned map.To apply a DCB map to an Ethernet port, follow these steps:Table 14. DCB Map to an Ethernet PortStep Task Command Command Mode1 Enter interface configuration mode on anEthernet port.interface{tengigabitEthernet slot/port /subport |fortygigabitEthernetslot/port}CONFIGURATION2 Apply the DCB map on the Ethernet port toconfigure it with the PFC and ETS settings inthe map; for example:Dell# interface tengigabitEthernet 1/1/1Dell(config-if-te-1/1/1)# dcb-mapSAN_A_dcb_map1 Repeat Steps 1 and 2 toapply a DCB map to more than one port.You cannot apply a DCB map on an interfacethat has been already configured for PFC usingthepfc priority command or which isalready configured for lossless queues (pfcno-drop queues command).dcb-map name INTERFACEConfiguring PFC without a DCB MapIn a network topology that uses the default ETS bandwidth allocation (assigns equal bandwidth to eachpriority), you can also enable PFC for specific dot1p-priorities on individual interfaces without using aDCB map. This type of DCB configuration is useful on interfaces that require PFC for lossless traffic, butdo not transmit converged Ethernet traffic.Table 15. Configuring PFC without a DCB MapStep Task Command Command Mode1 Enter interface configuration mode on anEthernet port.interface{tengigabitEthernet slot/port /subport |fortygigabitEthernetslot/port}CONFIGURATION2 Enable PFC on specified priorities. Range:0-7. Default: None.pfc prioritypriority-rangeINTERFACE248 Data Center Bridging (DCB)
