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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.
You must fully define the priority-group profile with a PGID and priorities before mapping it to a QoS
policy because the PGID and priorities are unique keys of the traffic class group (TCG) that define the
QoS policy.
You must disable the DCB output policy before changing the PGID or priorities of a priority group assigned
to that DCB output policy.
NOTE: Please note that Dell Networking does not recommended to use this command as it has been
deprecated in the current 9.4.(0.0) release. A warning message appears when you try to run this
command indicating that you have to use the dcb-map commands in the future.
Related
Commands
● priority-list — configures the 802.1p priorities for an ETS output policy.
● set-pgid — configures the priority-group.
qos-policy-output ets
To configure the ETS bandwidth allocation and scheduling for priority traffic, create a QoS output policy.
Syntax
qos-policy-output policy-name ets
To remove the QoS output policy, use the no qos-policy-output ets command.
Parameters
policy-name Enter the policy name. The maximum is 32 characters.
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
Version Description
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.3.16.0 Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
If an error occurs in an ETS output-policy configuration, the configuration is ignored and the scheduler
and bandwidth allocation settings are reset to the ETS default values (all priorities are in the same ETS
priority group and bandwidth is allocated equally to each priority).
If an error occurs when a port receives a peer’s ETS configuration, the port’s configuration is reset to the
previously configured ETS output policy. If no ETS output policy was previously applied, the port is reset
to the default ETS parameters.
You can only associate output QoS policy profiles with the priority groups in the DCB output profile
context; output QoS policy profiles are not permitted on output policy-maps.
WRED, ECN, rate shaping, and rate limiting are not supported in output policies because DCBx does not
negotiate these parameters with peer devices. You can apply a QoS output policy with WRED and/or rate
shaping on a DCBx CIN-enabled interface.
If you enable the scheduler command for a QoS ETS output policy, no bandwidth percentage is
assigned to the policy.
Related
Commands
● scheduler — schedule the priority traffic in port queues.
● bandwidth-percentage — bandwidth percentage allocated to the priority traffic in port queues.
488 Data Center Bridging (DCB)