Policy-Based Qos Commands - Dell MXL 10GbE Reference Manual

Command
Version 8.3.16.1
History
Usage
After you configure a unicast queue as strict-priority, that particular queue, on the
Information
entire chassis, is treated as a strict-priority queue. Traffic for a strict priority
is scheduled before any other queues are serviced. For example, if you send 100%
line rate traffic over the SP queue, it starves all other queues on the ports on which
this traffic is flowing. To assign the strict priority schedule type to egress queues,
use the scheduler strict command in QOS-POLICY-OUT mode. The system
OS does not support bandwidth configuration on strict priority scheduler queues.
When you enable ETS, the egress QoS features in the output QoS policy-map (such
as strict priority unicast <0-3> and scheduler strict), default
scheduler for egress queues are superseded by ETS configurations. This is to
provide compatibility with DCBX. Therefore, Dell Networking OS recommends
disabling ETS when you wish to apply these features exclusively. After you disable
ETS on an interface, the configured parameters are applied.

Policy-Based QoS Commands

Policy-based traffic classification is handled with class maps. These maps classify unicast traffic into one
of four classes. The system allows you to match multiple class maps and specify multiple match criteria.
Policy-based QoS is not supported on logical interfaces, such as port-channels, VLANs, or Loopbacks.
bandwidth-percentage
Assign a percentage of weight to the class/queue.
Syntax
bandwidth-percentage percentage
To remove the bandwidth percentage, use the no bandwidth-percentage
command.
Parameters
percentage
Defaults none
Command CONFIGURATION (conf-qos-policy-out)
Modes
Command
Version 9.2(0.0)
History
Version 8.3.16.1
1078
Introduced on the MXL 10/40GbE Switch IO Module.
Enter the percentage assignment of weight to the class/
queue. The range is from 1 to 100% (granularity 1%).
Introduced on the M I/O Aggregator. This command is
supported in Programmable-Mux (PMUX) mode only.
Introduced on the MXL 10/40GbE Switch IO Module.
Quality of Service (QoS)