Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

The dcb-input and dcb-output configuration commands are deprecated. You must use the dcp-map command to create a DCB map to configure priority flow control (PFC) and enhanced transmission selection (ETS) on Ethernet ports that support converged Ethernet traffic.

Configure the dcb-buffer-threshold command and its related parameters only on ports with either auto configuration or dcb-map configuration. This command is not supported on existing front-panel interfaces or stack ports that are configured with the dcb-input or dcb-output commands. Similarly, if the dcb-buffer-threshold configuration is present on a stack port or any interface, the dcb-input or dcb-ouput policies cannot be applied on those interfaces.

Example: When the dcb-buffer-threshold policy is applied on interfaces or stack ports with the dcb-input or dcb-output policies, the following error message is displayed:

%Error: dcb-buffer-threshold not supported on interfaces with deprecated commands

Example: When the dcb-input or dcb-output policy is configured on interfaces or stack ports with the dcb-buffer threshold policy, the following error message is displayed:

%Error: Deprecated command is not supported on interfaces with dcb-buffer-threshold configured

You must not modify the service-class dot1p mappings when any buffer-threshold-policy is configured on the system.

Dell(conf)#service-class dot1p-mapping dot1p0 3

% Error: PFC buffer-threshold policies conflict with dot1p mappings. Please remove all dcb-buffer-threshold policies to change mappings.

The show dcb command has been enhanced to display the following additional buffer-related information:

 Dell(conf)#do show dcb 
                                 dcb Status :  Enabled
                                 PFC Queue Count :  2 --Indicate the PFC queue configured.	
                                 Total buffer (lossy + lossless)(in KB): 7787--Total buffer space for lossy and lossless queues
                                 PFC total buffer (in KB): 6526 --Indicates the total buffer (configured or default)
                                 PFC shared buffer (in KB): 832--Indicates the shared buffer (Configured or default)
                                 PFC available buffer ( in KB): 5694--Indicates remaining available buffers for PFC that are free to be allocated