Users Guide

Table Of Contents
48 Contents
44 Class-of-Service . . . . . . . . . . . . . . . . . 1559
CoS Overview . . . . . . . . . . . . . . . . . . . . . 1559
What Are Trusted and Untrusted Port
Modes?
. . . . . . . . . . . . . . . . . . . . . . 1560
How Is Traffic Shaping Used on Egress
Traffic?
. . . . . . . . . . . . . . . . . . . . . . 1560
How Are Traffic Queues Defined?
. . . . . . . . 1561
Which Queue Management Methods Are
Supported? . . . . . . . . . . . . . . . . . . . . 1561
CoS Queue Usage
. . . . . . . . . . . . . . . . . 1563
Default CoS Values
. . . . . . . . . . . . . . . . . . . 1563
Configuring CoS (Web)
. . . . . . . . . . . . . . . . . 1565
Mapping Table Configuration
. . . . . . . . . . . 1565
Interface Configuration
. . . . . . . . . . . . . . 1567
Interface Queue Configuration
. . . . . . . . . . 1568
Interface Queue Drop Precedence
Configuration . . . . . . . . . . . . . . . . . . . 1569
Configuring CoS (CLI)
. . . . . . . . . . . . . . . . . 1571
Mapping Table Configuration
. . . . . . . . . . . 1571
CoS Interface Configuration Commands
. . . . . 1572
Interface Queue Configuration
. . . . . . . . . . 1572
Configuring Interface Queue Drop
Probability. . . . . . . . . . . . . . . . . . . . . 1574
CoS Configuration Example
. . . . . . . . . . . . . . 1575
Explicit Congestion Notification
. . . . . . . . . . . . 1578
Enabling ECN in Microsoft Windows
. . . . . . . 1579
Example 1: SLA Configuration
. . . . . . . . . . 1580
Example 2: Long-Lived Congestion
. . . . . . . . 1584
Example 3: Data Center TCP (DCTCP)
Configuration . . . . . . . . . . . . . . . . . . . 1584