Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 253
Applying a DCB Map on a Line Card, Data Center Bridging: Default Configuration
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Table 17. Configuring Lossless Queues Step Task 1 Enter INTERFACE Configuration mode. Command Command Mode interface {tengigabitEthernet slot/port CONFIGURATION | fortygigabitEthernet slot} port-number is a port number from 0 to 23. 2 Open a DCB map and enter DCB map dcb-map name configuration mode. INTERFACE 3 Disable PFC. no pfc mode on DCB MAP 4 Return to interface configuration mode. exit DCB MAP 5 Apply the DCB map, created to disable the dcb-map {name } PFC operation, on the interface INTERFACE 6 Configure the port queues that still pfc no-drop queuesqueue-range function as no-drop queues for lossless traffic. For the dot1p-queue assignments. The maximum number of lossless queues globally supported on a port is 2. You cannot configure PFC no-drop queues on an interface on which a DCB map with PFC enabled has been applied, or which is already configured for PFC using the pfc priority command. Range: 0-3. Separate queue values with a comma; specify a priority range with a dash; for example: pfc no-drop queues 1,3 or pfc no-drop queues 2-3 Default: No lossless queues are configured. INTERFACE Applying a DCB Map on a Line Card On the C9010, DCB is supported per-line card. If the traffic handled by a DCB map is transmitted on ports on different line cards, you must manually configure the DCB map on the backplane ports of the C9010 line cards on which the ports reside. • Apply a DCB map with PFC and ETS settings on the backplane ports of C9010 line cards. CONFIGURATION mode dcb-map {linecard {0-11 | all} [port-set {0-3 | all}] backplane all dcb-map-name NOTE: On the C9010, linecard 10 and linecard 11 correspond to RPM0 and RPM1 respectively. To enable DCB across C9010 line cards, apply a DCB map on all installed line cards (linecard 0-9) and RPMs (linecard 10-11). NOTE: If the DCB map you apply to the backplane ports of C9010 RPMs (linecard 10-11) configures two or more priority groups, you must increase the size of the PFC shared and total buffers (dcb pfc-shared-buffer-size and dcb pfc-total-buffer-size commands). Data Center Bridging: Default Configuration Before you configure PFC and ETS on a switch see the priority group setting taken into account the following default settings: • DCB is enabled. Data Center Bridging (DCB) 253
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