Administrator Guide

Interworking of DCB Map With DCB Buffer Threshold
Settings
DCB map functionality is supported on the Aggregator.
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
dcb-map
Create a DCB map to configure priority flow control (PFC) and enhanced transmission selection (ETS) on
Ethernet ports that support converged Ethernet traffic. Apply the DCB map to an Ethernet interface.
Syntax
dcb-map map-name
FC Flex IO Modules
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