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strict-priority 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.
pfc {on | off} Configure whether priority-based flow control is enabled (on) or disabled (off) for
port traffic in the priority group.
Committed/Peak Enter the bandwidth percentage for the priority group.
Defaults None
Command Modes DCB MAP
Command
History
Version Description
9.7(0.0) Introduced on the Z9500.
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.
dcb-map linecard all backplane all
Apply the specified DCB map on all ports of the switch linecard.
Syntax
dcb-map linecard <0-2/all> port-set <0-3/all> backplane all <dcb-map-name>
To remove the PFC and ETS settings in a DCB map from all linecard units, use theno dcb-map
linecard <0-2/all> port-set <0-3/all>backplane all <dcb-map-name> command.
Parameters
dcb-map-name Enter the name of the DCB map.
Defaults None
Command Modes CONFIGURATION
Command
History
Version Description
9.7(0.0) Introduced on the Z9500.
Usage
Information
The dcb-map linecard all backplane all command overwrites any previous DCB maps applied
to backplane
Data Center Bridging (DCB) 515