•  Junos OS Class of Service Configuration Guide
  •  Copyright and Trademark Information
  •  Table of Contents
  •   About This Guide
    •  J Series and SRX Series Documentation and Release Notes
    •  Objectives
    •  Audience
    •  Supported Routing Platforms
    •  Document Conventions
    •  Documentation Feedback
    •  Requesting Technical Support
  •   Configuring Class of Service
    •   Class of Service Overview
      •  CoS Terms
      •  Benefits of CoS
      •  CoS Across the Network
      •   Junos OS CoS Components
        •  Code-Point Aliases
        •   Classifiers
          •   Behavior Aggregate Classifiers
            •  Default IP Precedence Classifier
          •  Multifield Classifiers
        •  Forwarding Classes
        •  Loss Priorities
        •  Forwarding Policy Options
        •  Transmission Queues
        •   Schedulers
          •  Transmit Rate
          •  Delay Buffer Size
          •  Scheduling Priority
          •  Shaping Rate
          •  RED Drop Profiles
          •  Default Drop Profiles
        •  Virtual Channels
        •  Policers for Traffic Classes
        •  Rewrite Rules
      •   How CoS Components Work
        •  CoS Process on Incoming Packets
        •  CoS Process on Outgoing Packets
      •   Default CoS Settings
        •  Default CoS Values and Aliases
        •  Forwarding Class Queue Assignments
        •  Scheduler Settings
        •   Default Behavior Aggregate Classifiers
          •  Defining BA Classifiers
          •  Applying a BA Classifier to a Logical Interface
        •  CoS Value Rewrites
        •  Sample Behavior Aggregate Classification
      •  Transmission Scheduling
      •   CoS Queuing for Tunnels
        •  Benefits of CoS Queuing on Tunnel Interfaces
        •  How CoS Queuing Works
        •  Limitations on CoS Shapers for Tunnel Interfaces
    •   Configuring Class of Service
      •  Before You Begin
      •   Configuring CoS (J-Web Procedure)
        •  Defining CoS Value Aliases
        •  Defining Forwarding Classes
        •  Defining Classifiers
        •  Defining Rewrite Rules
        •  Defining Schedulers
        •  Defining Scheduler Maps
        •  Defining Drop Profiles
        •  Defining Virtual Channel Groups
        •  Assigning CoS Components to Interfaces
      •   Configuring CoS Components with a Configuration Editor
        •  Configuring a Policer for a Firewall Filter
        •  Configuring and Applying a Firewall Filter for a Multifield Classifier
        •   Assigning Forwarding Classes to Output Queues
          •  Configuring Forwarding Classes
          •  Assigning a Forwarding Class to an Interface
        •  Example: Configuring Up to Eight Forwarding Classes
        •  Configuring and Applying Rewrite Rules
        •   Configuring and Applying Behavior Aggregate Classifiers
          •  Example: Defining Aliases for Bits
        •   Configuring RED Drop Profiles for Congestion Control
          •  Example: Configuring RED Drop Profiles
        •  Configuring Schedulers
        •  Configuring and Applying Scheduler Maps
        •  Scheduler Maps: Sample Configuration
        •  Schedulers: Sample Configuration
        •  Configuring and Applying Virtual Channels
        •  Configuring and Applying an Adaptive Shaper
      •   Configuring Virtual Channels
        •  Configuring CoS Virtual Channels
        •  Creating a List of Virtual Channel Names
        •  Defining a Virtual Channel Group
        •  Applying a Virtual Channel Group to a Logical Interface
        •  Selecting Traffic to Be Transmitted from a Particular Virtual Channel
        •  Example: Configuring Virtual Channels
      •   Configuring Adaptive Shaping for Frame Relay
        •  Configuring an Adaptive Shaper
        •  Applying an Adaptive Shaper to a Logical Interface
      •   Classifying Frame Relay Traffic
        •  Assigning the Default Frame Relay Loss Priority Map to an Interface
        •   Defining a Custom Frame Relay Loss Priority Map
          •  Applying the Map to a Logical Interface
        •  Verifying Your Configuration
      •   Rewriting Frame Relay Headers
        •  Assigning the Default Frame Relay Rewrite Rule to an Interface
        •   Defining a Custom Frame Relay Rewrite Rule
          •  Applying the Rule to a Logical Interface
      •   Configuring Strict-High Priority
        •  Example: Configuring Strict High Priority Using the CLI
        •  Example: Configuring Priority Scheduling
      •   Configuring CoS for Tunnels
        •   Configuring CoS Queuing for Tunnels with a Configuration Editor
        •   Preserving the ToS Value of a Tunneled Packet
        •  Example: Configuring CoS for GRE/IPIP tunnels
        •  Restrictions on CoS Shapers
      •  Configuring Strict High Priority for Queuing with a Configuration Editor
      •   Configuring Large Delay Buffers with a Configuration Editor
        •  Maximum Delay Buffer Sizes Available to Channelized T1/E1 Interfaces
        •  Delay Buffer Size Allocation Methods
        •  Specifying Delay Buffer Sizes for Queues
        •  Configuring a Large Delay Buffer on a non-Channelized Ti Interface
        •  Configuring a Large Delay Buffer on a Channelized T1 Interface
      •  Applying an Ingress Interface Policer
      •   Configuring Simple Filters and Policers
        •  Configuring a Simple Filter
        •  Applying a Simple Filter
        •   Configuring Policers
          •  Example: Applying a Two-Rate Tricolor Marking Policer to a Firewall Filter
      •   Configuring CoS Hierarchical Schedulers
        •  Hierarchical Scheduler Terminology
        •  SRX3400 and SRX3600 Device Hardware Capabilities and Limitations
        •  Configuring an Interface Set
        •  Applying an Interface Set
        •  Interface Set Caveats
        •  Introduction to Hierarchical Schedulers
        •   Scheduler Hierarchy Example
          •  Interface Sets for the Hierarchical Example
          •  Interfaces for the Hierarchical Example
          •  Traffic Control Profiles for the Hierarchical Example
          •  Schedulers for the Hierarchical Example
          •  Drop Profiles for the Hierarchical Example
          •  Scheduler Maps for the Hierarchical Example
          •  Applying Traffic Control Profiles for the Hierarchical Example
        •  Controlling Remaining Traffic
        •  Internal Scheduler Nodes
        •  PIR-only and CIR Mode
        •  Priority Propagation
        •  IOC Hardware Properties
        •  WRED on the IOC
        •  MDRR on the IOC
        •   Configuring Excess Bandwidth Sharing
          •  Excess Bandwidth Sharing and Minimum Logical Interface Shaping
          •  Selecting Excess Bandwidth Sharing Proportional Rates
          •  Mapping Calculated Weights to Hardware Weights
          •  Allocating Weight with Only Shaping Rates or Unshaped Logical Interfaces
          •  Sharing Bandwidth Among Logical Interfaces
      •   Verifying a CoS Configuration
        •  Verifying Multicast Session Announcements
        •  Verifying a Virtual Channel Configuration
        •  Verifying a Virtual Channel Group Configuration
        •  Verifying an Adaptive Shaper Configuration
        •  Displaying CoS Tunnel Configurations
        •  Verifying a CoS GRE Tunnel Queuing Configuration
        •  Verifying a CoS IP-IP Tunnel Configuration
      •   Configuring Class of Service for IPv6 Traffic
        •  Overview of Class-of-Service Functions for IPv6 Traffic
        •  Configuring and Applying a DSCP IPv6 BA Classifier
        •  Configuring DSCP IPv6 Rewrite Rules
  •   Index
    •  Index

Symbols

#, comments in configuration statements    1

( ), in syntax descriptions    1

< >, in syntax descriptions    1

[ ], in configuration statements    1

{ }, in configuration statements    1

| (pipe), in syntax descriptions    1

A

adaptive shaping    

applying CoS rules to logical interfaces    1

verifying    1

adaptive-shaper statement    

usage guidelines    1

adaptive-shapers statement    

usage guidelines    1

AF forwarding class     See assured forwarding forwarding class    

aliases, CoS     See CoS value aliases    

applying a simple filter    1

applying a two-rate tricolor marker    1

applying an interface set    1

applying CoS shaping and scheduling    

SRX5600 and SRX5800 devices    1

applying traffic control for hierarchical example    1

assigning a forwarding class to an interface    1

assured forwarding (AF) forwarding class    1,  See also CoS; forwarding classes    

RED drop profiles for    1

B

BA classifiers     See classifiers    

BE forwarding class     See best-effort forwarding class    

behavior aggregate classifiers     See classifiers    

best-effort (BE) forwarding class    

default assignment    1,  See also CoS; forwarding classes    

typical usage    1

braces, in configuration statements    1

brackets    

angle, in syntax descriptions    1

square, in configuration statements    1

building a scheduler hierarchy    1

C

channelized Nxds0 interface, maximum delay buffer time    1

channelized T1/E1 interfaces, larger delay buffer    

configuration editor    1

overview    1

class of service     See Class of Service pages; CoS    

Class of Service    

applying an interface set    1

configuring an interface set    1

interface set caveats    1

IOC hardware properties    1

IPv6    1

Class of Service classifiers page    1

Class of Service Cos value aliases page    1

Class of Service forwarding classes page    1

Class of Service Interfaces page    1

Class of Service RED drop profiles page    1

Class of Service rewrite rules page    1

Class of Service scheduler maps page    1

Class of Service schedulers page    1

Class of Service virtual channel groups page    1

field summary    1

classification    

for Frame Relay traffic    1, 2

classifiers    

applying behavior aggregate classifiers    1, 2

assigning to logical interfaces (Quick Configuration)    1

behavior aggregate    1

default behavior aggregate classifiers    1

defining (Quick Configuration)    1

description    1

IPv6    1

multifield classifiers    1

sample behavior aggregate classification    1

sample behavior aggregate classifier assignments    1, 2

sample, for firewall filter    1

strict high-priority queuing (configuration editor)    1

strict high-priority queuing, applying classifier to interface (configuration editor)    1

clear-channel interfaces, maximum delay buffer time    1

CLI configuration editor    

CoS    1

CoS, large delay buffers    1

CoS, strict high priority for queuing    1

comments, in configuration statements    1

configuring CoS queuing    1

configuring excess bandwidth sharing    1

configuring forwarding classes    1

configuring policers    1

configuring priority scheduling example    1

configuring red drop profiles example    1

configuring simple filters    1

configuring up to eight forwarding classes    1

congestion control    

with CoS schedulers (Quick Configuration)    1

with DiffServ assured forwarding (configuration editor)    1

controlling remaining traffic    1

conventions    

notice icons    1

text and syntax    1

copy-tos-to-outer-ip-header statement    

usage guidelines    1

CoS    

for Frame Relay    1

for tunnels    

GRE ToS bits    1

for virtual channels    1

example configuration    1

scheduling    

example configuration    1

CoS (class of service)    

adaptive shaping for rules    1

aliases     See CoS value aliases    

assigning components to interfaces (Quick Configuration)    1

assigning forwarding classes to output queues    1

behavior aggregate classifiers     See classifiers    

benefits    1

classifiers     See classifiers    

configuration tasks (configuration editor)    1

configuration tasks (Quick Configuration)    1

CoS process (Junos OS implementation)    1

CoS value aliases     See CoS value aliases    

CoS value rewrites    1

CoS values     See CoS value aliases    

default scheduler settings     See schedulers    

default settings    1

firewall filter for a multifield classifier    1

forwarding classes     See forwarding classes    

interfaces, assigning components to (Quick Configuration)    1

IPv6    1

Junos OS components    1

Junos OS implementation    1

large delay buffers (configuration editor)    1

overview    1,  See also Class of Service pages    

policer for firewall filter    1

preparation    1

Quick Configuration    1

RED drop profiles     See RED drop profiles    

rewrite rules     See rewrite rules    

sample behavior aggregate classification    1

scheduler maps     See scheduler maps    

schedulers     See schedulers    

slower interfaces, enlarging delay buffers for (configuration editor)    1

starvation prevention for queues (configuration editor)    1

strict high priority for queuing (configuration editor)    1

traffic flow    1

transmission scheduling    1

uses    1

verifying adaptive shaper configuration    1

verifying GRE tunnel configuration    1

verifying multicast session announcements    1

verifying virtual channel configuration    1

verifying virtual channel group configuration    1

virtual channel groups (Quick Configuration)    1,  See also virtual channels    

virtual channels for rules     See virtual channels    

CoS components    

classifiers    1

code-point alias    1

forwarding classes    1

forwarding policies    1

loss priorities    1

policers    1

RED drop profiles    1

rewrite rules    1

schedulers    1

shaping rate    1

transmission queues    1

virtual channels    1

CoS hierarchical schedulers    

configuring    1

CoS process    

incoming packets    1

outgoing packets    1

overview (Junos OS implementation)    1

CoS queuing for tunnels    1

CoS value aliases    

default values    1

rewrite rules    1

CoS values     See CoS value aliases    

CoS, configuring tunnels    1

CoS-based Forwarding (CBF)    1

curly braces, in configuration statements    1

customer support    1

contacting JTAC    1

D

default statement    

usage guidelines    1

defaults    

behavior aggregate classifiers    1, 2

CoS forwarding class assignments    1, 2

defining aliases for bits example    1

defining behavior aggregate classifiers    1

delay buffer size    

allocation methods    1

calculation    1

description    1

enlarging    1

enlarging (configuration editor)    1

maximum available    1

device    

CoS overview    1

diagnosis    

verifying adaptive shaper configuration    1

verifying CoS tunnel configuration    1

verifying multicast session announcements    1

verifying virtual channel configuration    1, 2

Differentiated Services     See DiffServ    

DiffServ (Differentiated Services)    

assigning forwarding classes to output queues    1

assured forwarding    1

behavior aggregate classifiers    1

configuration tasks (configuration editor)    1

firewall filter for a multifield classifier    1

interoperability    1

Junos OS implementation    1

policer for firewall filter    1

RED drop profiles    1

rewrite rules    1

scheduler maps    1

schedulers    1

virtual channels for rules    1

documentation    

comments on    1

drop profiles     See CoS; RED drop profiles    

drop profiles for hierarchical example    1

DS0 interfaces, maximum delay buffer time    1

DSCP IPv6     See CoS; DSCPs    

DSCPs (DiffServ code points)    

default behavior aggregate classifiers    1

DSCP aliases and values    1,  See also CoS    

replacing with rewrite rules    1

rewrites    1

sample behavior aggregate classification    1

E

EF forwarding class    1,  See also CoS; forwarding classes    

excess bandwidth sharing    1

expedited-forwarding (EF) forwarding class    1,  See also CoS; forwarding classes    

F

firewall filters    

applying CoS rules to logical interfaces    1

multifield classifier filter terms    1

policer for    1

sample classifier terms    1

font conventions    1

forwarding classes    

assigning to an interface    1

assigning to logical interfaces (Quick Configuration)    1

assigning to output queues (configuration editor)    1

assigning to output queues (Quick Configuration)    1

configuring    1

configuring up to eight    1

default assignments    1

default values    1

defining (Quick Configuration)    1

description    1

mapping to schedulers (configuration editor)    1

queue assignments, default    1

sample behavior aggregate classification    1

sample mappings    1

forwarding policy options    1

Frame Relay    

CoS classification of traffic    1, 2

Frame Relay, CoS adaptive shaping for    1

frame-relay-de statement    

usage guidelines    1, 2, 3

G

glossary    

CoS    1

GRE tunnels, configuring CoS queuing    1

H

hardware    

supported platforms    1

hardware capabilities and limitations    

SRX3400 and SRX3600 devices    1

hierarchical schedulers    

controlling remaining traffic    1

example    1

introduction    1

nodes    1

priority propagation    1

terminology    1

high-priority CoS queuing    1

I

IEEE 802.1 CoS value type, aliases and values    1,  See also CoS    

interface set caveats    1

internal scheduler nodes    1

introduction to hierarchical schedulers    1

IOC hardware properties    1

IP precedence CoS value type, aliases and values    1,  See also CoS    

IPv6    

BA classifier    1

Class of Service    1

J

J-Web configuration editor    

CoS    1

CoS, large delay buffers    1

CoS, strict high priority for queuing    1

Junos OS    

CoS components    1

CoS implementation    1

L

logical interfaces    

adaptive shaping for    1

assigning CoS components to (Quick Configuration)    1

CoS rules for    1, 2

virtual channels for    1

loss priorities    1

loss-priority-maps statement    

usage guidelines    1

M

manuals    

comments on    1

mapping calculated weights    1

mapping, CoS forwarding classes to schedulers    1, 2

MDRR on the IOC    1

MF classifier    1

MPLS EXP CoS value type, aliases and values    1,  See also CoS    

multifield classifier    1

N

NC forwarding class    1,  See also CoS; forwarding classes    

network control (NC) forwarding class    1,  See also CoS; forwarding classes    

network interfaces    

assigning CoS components to (Quick Configuration)    1

nodes    

hierarchical schedulers    1

notice icons    1

O

output queues    

assigning forwarding classes (configuration editor)    1

sample assignments    1

P

packets    

applying CoS scheduling rules    1

parentheses, in syntax descriptions    1

physical interfaces    

assigning CoS components to (Quick Configuration)    1

PIR-only and CIR mode    1

policers    

configuring    1

for CoS traffic classes    1

for firewall filter    1

strict high-priority queuing (configuration editor)    1

priority propagation    1

priority scheduling    

configuration example    1

Q

queues    1,  See also CoS; output queues; queuing    

queuing    

CoS rules    1

starvation prevention (configuration editor)    1

strict high priority (configuration editor)    1

Quick Configuration    

Class of Service Interfaces page    1

CoS classifiers page    1

CoS forwarding classes page    1

CoS RED drop profiles page    1

CoS scheduler maps page    1

CoS schedulers page    1

CoS value aliases page    1

rewrite rules page    1

virtual channel groups page    1

R

random early detection     See RED drop profiles    

RED (random early detection) drop profiles    

defining (configuration editor)    1

defining (Quick Configuration)    1

description    1

sample configurations    1

red drop profiles    

configuration example    1

rewrite rules    

assigning to logical interfaces (configuration editor)    1

assigning to logical interfaces (Quick Configuration)    1

defining (configuration editor)    1

defining (Quick Configuration)    1

description    1

replacing DSCPs (configuration editor)    1

sample rules    1

when applied    1

rewrite-rules statement    

usage guidelines    1

routing    

overriding default packet forwarding with CoS    1

routing solutions    

CoS    1, 2

S

sample configuration    

scheduler maps    1

sample configurations    

CoS behavior aggregate classification forwarding classes and queues    1

scheduler hierarchy example    1

applying traffic control profiles    1

drop profiles    1

interface sets    1

interfaces    1

scheduler maps    1

schedulers    1

traffic control profiles    1

scheduler maps    

assigning (configuration editor)    1

assigning to logical interfaces (Quick Configuration)    1

assigning to physical interfaces (Quick Configuration)    1

defining (configuration editor)    1

defining (Quick Configuration)    1

sample configuration    1

strict high-priority queuing (configuration editor)    1

strict high-priority queuing, applying scheduler map to interface (configuration editor)    1

scheduler maps for hierarchical example    1

scheduler-map statement    

usage guidelines    1

schedulers    1,  See also transmission scheduling    

assigning resources (configuration editor)    1

buffer size    1

default settings    1

defining (configuration editor)    1

defining (Quick Configuration)    1

description    1

mapping to forwarding classes (configuration editor)    1

mapping to forwarding classes (Quick Configuration)    1

RED drop profiles    1

sample mappings    1

sample schedulers    1

scheduler maps     See scheduler maps    

shaping rate    1

transmission priority    1

transmit rate    1

voice and data for strict high-priority queuing (configuration editor)    1

voice, for strict high-priority queuing (configuration editor)    1

schedulers for hierarchical example    1

scheduling    

strict-high priority    

example configuration    1

scheduling priority    1,  See also CoS; scheduler maps; schedulers    

Services Router    

CoS    1

shaping rate    1,  See also CoS; scheduler maps; schedulers    

shaping-rate statement    

usage guidelines    1, 2

show class-of-service adaptive-shaper command    1

show class-of-service interface command    1

show class-of-service virtual-channel command    1

show class-of-service virtual-channel-group command    1

show interfaces queue command    1, 2

explanation    1, 2

show sap listen command    1

explanation    1

simple filters    

applying    1

configuring    1

SRX3400 and SRX3600 devices    1

SRX3400 and SRX3600 device hardware capabilities and limitations    1

starvation prevention, on CoS queues    1

stateless firewall filters    

strict high-priority queuing (configuration editor)    1

strict high-priority queuing, CoS    

applying a scheduler map to interface (configuration editor)    1

applying classifier to interface (configuration editor)    1

assigning queues    1

classifying traffic    1

configuring a scheduler map and schedulers (configuration editor)    1

configuring policiers (configuration editor)    1

creating a stateless firewall filter (configuration editor)    1

defining voice and data schedulers (configuration editor)    1

overview    1

strict-high priority, explained    

example configuration    1

support, technical     See technical support    

syntax conventions    1

T

technical support    

contacting JTAC    1

terminology    

CoS    1

hierarchical schedulers    1

terms    

firewall filter, for multifield classifier    1

traffic control profiles for hierarchical example    1

transmission priority    1,  See also CoS; scheduler maps; schedulers    

transmission scheduling    1

transmit rate    

description    1,  See also CoS; schedulers; transmission scheduling    

trigger statement    

usage guidelines    1

tunnels    

CoS queuing    1

two-rate tricolor marking policer    

applying to a firewall    1

V

verification    

adaptive shaping    1

CoS adaptive shaping    1

CoS configuration    1

CoS virtual channel groups    1

CoS virtual channels    1

multicast session announcements    1

virtual channel groups    1

virtual channels    1

virtual channel groups    

adding and editing (Quick Configuration)    1

assigning to logical interfaces (Quick Configuration)    1

summary (Quick Configuration)    1

verifying    1

virtual channels    1

adding and editing (Quick Configuration)    1

applying CoS rules to logical interfaces    1

applying to an interface    1, 2

defining a group    1

defining groups (Quick Configuration)    1

defining names    1

example configuration    1

groups     See virtual channel groups    

verifying    1

virtual-channel statement    

usage guidelines    1

virtual-channel-group statement    

usage guidelines    1

virtual-channel-groups statement    

usage guidelines    1

virtual-channels statement    

usage guidelines    1

voice traffic, prioritizing packets for, in CoS queues    1

W

WRED on the IOC    1