Dell S4810 Reference Manual page 575

bandwidth
percentage
strict-priority
pfc {on | off}
Defaults None
Command DCB MAP
Modes
Command
Version 9.3(0.0)
History
Usage
Use the dcb-map command to configure priority groups with PFC and/or ETS
Information
settings and apply them to Ethernet interfaces.
Use the priority-pgid command to map 802.1p priorities to a priority group.
You can assign each 802.1p priority to only one priority group. A priority group
consists of 802.1p priority values that are grouped together for similar bandwidth
allocation and scheduling, and that share latency and loss requirements. All 802.1p
priorities mapped to the same queue must be in the same priority group.
Repeat the priority-group bandwidth pfc command to configure PFC and
ETS traffic handling for each priority group in a DCB map.
You can enable PFC on a maximum of two priority queues.
If you configure more than one priority group as strict priority, the higher
numbered priority queue is given preference when scheduling data traffic.
If a priority group does not use its allocated bandwidth, the unused bandwidth is
made available to other priority groups.
To remove a priority-group configuration in a DCB map, enter the no priority-
group bandwidth pfc command.
By default, equal bandwidth is assigned to each dot1p priority in a priority group.
Use the bandwidth parameter to configure the bandwidth percentage assigned to
a priority group. The sum of the bandwidth allocated to all priority groups in a DCB
map must be 100% of the bandwidth on the link. You must allocate at least 1% of
the total port bandwidth to each priority group.
Data Center Bridging (DCB)
Enter the keyword bandwidth followed by a bandwidth
percentage allocated to the priority group. The range of valid
values is 1 to 100. The sum of all allocated bandwidth
percentages in priority groups in a DCB map must be 100%.
Configure the priority-group traffic to be handled with strict
priority scheduling. Strict-priority traffic is serviced first,
before bandwidth allocated to other priority groups is made
available.
Configure whether priority-based flow control is enabled
(on) or disabled (off) for port traffic in the priority group.
Introduced on the S4810, S6000 platforms.
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