Connectivity Guide

Version Description
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.
scheduler
Configure the method used to schedule priority traffic in port queues.
Syntax
scheduler value
To remove the configured priority schedule, use the no scheduler command.
Parameters
value Enter schedule priority value. The range: strict: strict-priority traffic is serviced
before any other queued traffic.
Defaults Weighted Elastic Round Robin (WERR) scheduling is used to queue priority traffic.
Command Modes POLICY-MAP-OUT-ETS
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
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.8(0.0) Introduced on the S3048-ON and S4048-ON.
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
dot1p priority traffic on the switch is scheduled to the current queue mapping. dot1p priorities within the
same queue must have the same traffic properties and scheduling method.
ETS-assigned scheduling applies only to data queues, not to control queues.
The configuration of bandwidth allocation and strict-queue scheduling is not supported at the same
time for a priority group. If you configure both, the configured bandwidth allocation is ignored for priority-
group traffic when you apply the output policy on an interface.
If you enable this command for a QoS ETS output policy, no bandwidth percentage is assigned to the
policy.
Data Center Bridging (DCB) 497