Administrator Guide

Command Modes CONFIGURATION
Supported Modes Programmable-Mux (PMUX)
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
9.2(0.0) Introduced on the M I/O Aggregator.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
A priority group consists of 802.1p priority values that are grouped 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.
You must configure 802.1p priorities in priority groups associated with an ETS output policy. You can
assign each dot1p priority to only one priority group.
The maximum number of priority groups supported in ETS output policies on an interface is equal to the
number of data queues (4) on the port. The 802.1p priorities in a priority group can map to multiple
queues.
If you configure more than one priority queue as strict priority or more than one priority group as strict
priority, the higher numbered priority queue is given preference when scheduling data traffic.
priority-group bandwidth pfc
Configure the ETS bandwidth allocation and PFC mode used to manage port traffic in an 802.1p priority group.
Syntax
priority-group group-num {bandwidth percentage| strict-priority} pfc {on |
off}
Parameters
priority-group
group-num
Enter the keyword priority-group followed by the number of an 802.1p priority
group. Use the priority-pgid command to create the priority groups in a DCB
map.
bandwidth
percentage
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%.
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.
Defaults None
Command Modes DCB MAP
Supported Modes Programmable-Mux (PMUX)
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
9.3(0.0) Introduced on the FC Flex IO module installed in the M I/O Aggregator.
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.
Data Center Bridging (DCB) 99