Users Guide

Important Points to Remember
• If you remove a dot1p priority-to-priority group mapping from a DCB map (the no priority pgid
command), the PFC and ETS parameters revert to their default values on the interfaces on which the
DCB map is applied. By default, PFC is not applied on specific 802.1p priorities; ETS assigns equal
bandwidth to each 802.1p priority.
As a result, PFC and lossless port queues are disabled on 802.1p priorities, and all priorities are mapped
to the same priority queue and equally share port bandwidth.
• To change the ETS bandwidth allocation configured for a priority group in a DCB map, do not modify
the existing DCB map configuration. Instead, first create DCB map with the desired PFC and ETS settings
and apply the new map to the interfaces to override the previous DCB map settings. Then delete the
original dot1p priority-priority group mapping.
If you delete the dot1p priority-priority group mapping (the no priority pgid command) before you
apply the new DCB map, the default PFC and ETS parameters are applied on the interfaces. This change
may create a DCB mismatch with peer DCB devices and interrupt network operation.
Applying a DCB Map on Server-Facing Ethernet
Ports
You can apply a DCB map only on a physical Ethernet interface and can apply only one DCB map per
interface.
1 Enter the interface Configuration mode on a server-facing port or port channel to apply a DCB map.
CONFIGURATION mode
interface {tengigabitEthernet slot/port | fortygigabitEthernet slot/port}
NOTE: You cannot apply a DCB map on a port channel. However, you can apply a DCB map on the
ports that are members of the port channel.
2 Apply the DCB map on an Ethernet port or port channel.
INTERFACE mode
dcb-map name
The port is configured with the PFC and ETS settings in the DCB map.
For example:
Dell# interface tengigabitEthernet 0/0
Dell(config-if-te-0/0)# dcb-map SAN_DCB1
To apply a DCB map to more than one port or port channel, repeat this step.
NPIV Proxy Gateway 708