Users Guide

Version Description
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
You can enable any number of 802.1p priorities for PFC. Queues to which PFC priority trac is mapped are lossless
by default. Trac may be interrupted due to an interface ap (going down and coming up) when you recongure
the lossless queues for no-drop priorities in a PFC input policy and reapply the policy to an interface.
The maximum number of lossless queues supported on the I/O Aggregator switch is four.
A PFC peer must support the congured priority trac (as DCBX detects) to apply PFC.
priority-group
To use with an ETS output policy, create an ETS priority group.
Syntax
priority-group group-name
To remove the priority group, use the no priority-group command.
Parameters
group-name Enter the name of the ETS priority group. The maximum is 32 characters.
Defaults none
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 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}
Data Center Bridging (DCB) 113