- play_arrow CoS Overview
- play_arrow Basic Concepts
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- play_arrow Scheduling Traffic
- play_arrow Using Schedulers
- Understanding CoS Scheduling Behavior and Configuration Considerations
- Defining CoS Queue Schedulers for Port Scheduling
- Defining CoS Queue Scheduling Priority
- Example: Configuring Queue Scheduling Priority
- Monitoring CoS Scheduler Maps
- Understanding CoS Traffic Control Profiles
- Understanding CoS Priority Group Scheduling
- Defining CoS Traffic Control Profiles (Priority Group Scheduling)
- Example: Configuring Traffic Control Profiles (Priority Group Scheduling)
- Understanding CoS Priority Group and Queue Guaranteed Minimum Bandwidth
- Example: Configuring Minimum Guaranteed Output Bandwidth
- Understanding CoS Priority Group Shaping and Queue Shaping (Maximum Bandwidth)
- Example: Configuring Maximum Output Bandwidth
- Understanding CoS Explicit Congestion Notification
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- play_arrow Configuration Statements and Operational Commands
Defining CoS BA Classifiers (DSCP, DSCP IPv6, IEEE 802.1p)
Overview
Packet classification associates incoming packets with a particular CoS servicing level. Behavior aggregate (BA) classifiers examine the Differentiated Services code point (DSCP or DSCP IPv6) value, the IEEE 802.1p CoS value, or the MPLS EXP value in the packet header to determine the CoS settings applied to the packet. (See Configuring a Global MPLS EXP Classifier to learn how to define EXP classifiers for MPLS traffic.) BA classifiers allow you to set the forwarding class and loss priority of a packet based on the incoming CoS value.
One most devices, unicast traffic uses different classifiers than multidestination (mulitcast,
broadcast, and destination lookup fail) traffic. You use the multi-destination
statement at the [edit class-of-service] hierarhcy level to configure a
multidestination BA classifier.
Multidestination classifiers apply to all of the switch interfaces and handle multicast, broadcast, and destination lookup fail (DLF) traffic. You cannot apply a multidestination classifier to a single interface or to a range of interfaces.
Platform-specific Information
OCX Series switches do not support MPLS EXP classifiers.
On QFX10000 switches and NFX Series devices, unicast and multidestination traffic use the same classifiers and forwarding classes.
QFX5130, QFX5700 & QFX5220 switches do not support DSCP IPv6 classifiers and rewrite rules. However, you can apply DSCP classifiers and rewrite rules for IPV6 traffic as well.
To configure a DSCP, DSCP IPv6, or IEEE 802.1p BA classifier using the CLI:
