Dell C9000 Series Reference Manual page 720

strict-priority
pfc {on | off}
Defaults None
Command Modes DCB MAP
Command History
Version
9.9(0.0)
9.7(0.1)
9.7(0.0)
9.6(0.0)
9.3(0.0)
Usage Information Use the dcb-map command to configure priority groups with PFC and/or ETS 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.
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.
Description
Introduced on the C9010.
Introduced on the S3048-ON and S4048-ON..
Introduced on the S6000-ON.
Added support to configure peak and committed rate on the
S6000 platform.
Introduced on the S4810, S6000 platforms.
Data Center Bridging (DCB) 720