Users Guide

Version Description
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 congure 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 congure 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 trac.
priority-group bandwidth pfc
Congure the ETS bandwidth allocation and PFC mode used to manage port trac 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 Congure the priority-group trac to be handled with strict priority scheduling. Strict-
priority trac is serviced rst, before bandwidth allocated to other priority groups is made
available.
pfc {on | o} Congure whether priority-based ow control is enabled (on) or disabled (o) for port
trac in the priority group.
Defaults None
Command Modes DCB MAP
Supported Modes Programmable-Mux (PMUX)
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
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 congure priority groups with PFC and/or ETS settings and apply them to
Ethernet interfaces.
120 Data Center Bridging (DCB)