close
keyboard_arrow_left
Table of Contents
- play_arrow Overview
- play_arrow Understanding How Class of Service Manages Congestion and Defines Traffic Forwarding Behavior
- Understanding How Class of Service Manages Congestion and Controls Service Levels in the Network
- How CoS Applies to Packet Flow Across a Network
- The Junos OS CoS Components Used to Manage Congestion and Control Service Levels
- Mapping CoS Component Inputs to Outputs
- Default Junos OS CoS Settings
- Packet Flow Through the Junos OS CoS Process Overview
- Configuring Basic Packet Flow Through the Junos OS CoS Process
- Example: Classifying All Traffic from a Remote Device by Configuring Fixed Interface-Based Classification
- Interface Types That Do Not Support Junos OS CoS
-
- play_arrow Configuring Platform-Specific Functionality
- play_arrow Configuring Class of Service on ACX Series Universal Metro Routers
- CoS on ACX Series Routers Features Overview
- Understanding CoS CLI Configuration Statements on ACX Series Routers
- DSCP Propagation and Default CoS on ACX Series Routers
- Configuring CoS on ACX Series Routers
- Classifiers and Rewrite Rules at the Global, Physical, and Logical Interface Levels Overview
- Configuring Classifiers and Rewrite Rules at the Global and Physical Interface Levels
- Applying DSCP and DSCP IPv6 Classifiers on ACX Series Routers
- Schedulers Overview for ACX Series Routers
- Shared and Dedicated Buffer Memory Pools on ACX Series Routers
- CoS for PPP and MLPPP Interfaces on ACX Series Routers
- CoS for NAT Services on ACX Series Routers
- Hierarchical Class of Service in ACX Series Routers
- Storm Control on ACX Series Routers Overview
- play_arrow Configuring Class of Service on MX Series 5G Universal Routing Platforms
- Junos CoS on MX Series 5G Universal Routing Platforms Overview
- CoS Features and Limitations on MX Series Routers
- Configuring and Applying IEEE 802.1ad Classifiers
- Scheduling and Shaping in Hierarchical CoS Queues for Traffic Routed to GRE Tunnels
- Example: Performing Output Scheduling and Shaping in Hierarchical CoS Queues for Traffic Routed to GRE Tunnels
- CoS-Based Interface Counters for IPv4 or IPv6 Aggregate on Layer 2
- Enabling a Timestamp for Ingress and Egress Queue Packets
- play_arrow Configuring Class of Service on PTX Series Packet Transport Routers
- CoS Features and Limitations on PTX Series Routers
- CoS Feature Differences Between PTX Series Packet Transport Routers and T Series Routers
- Understanding Scheduling on PTX Series Routers
- Virtual Output Queues on PTX Series Packet Transport Routers
- Example: Configuring Excess Rate for PTX Series Packet Transport Routers
- Identifying the Source of RED Dropped Packets on PTX Series Routers
- Configuring Queuing and Shaping on Logical Interfaces on PTX Series Routers
- Example: Configuring Queuing and Shaping on Logical Interfaces in PTX Series Packet Transport Routers
- Example: Configuring Strict-Priority Scheduling on a PTX Series Router
- CoS Support on EVPN VXLANs
- Understanding CoS CLI Configuration Statements on PTX Series Routers
- Classification Based on Outer Header of Decapsulation Tunnel
-
- play_arrow Configuring Line Card-Specific and Interface-Specific Functionality
- play_arrow Feature Support of Line Cards and Interfaces
- play_arrow Configuring Class of Service for Tunnels
- play_arrow Configuring Class of Service on Services PICs
- CoS on Services PICs Overview
- Configuring CoS Rules on Services PICs
- Configuring CoS Rule Sets on Services PICs
- Example: Configuring CoS Rules on Services PICs
- Packet Rewriting on Services Interfaces
- Multiservices PIC ToS Translation
- Fragmentation by Forwarding Class Overview
- Configuring Fragmentation by Forwarding Class
- Configuring Drop Timeout Interval for Fragmentation by Forwarding Class
- Example: Configuring Fragmentation by Forwarding Class
- Allocating Excess Bandwidth Among Frame Relay DLCIs on Multiservices PICs
- Configuring Rate Limiting and Sharing of Excess Bandwidth on Multiservices PICs
- play_arrow Configuring Class of Service on IQ and Enhanced IQ (IQE) PICs
- CoS on Enhanced IQ PICs Overview
- Calculation of Expected Traffic on IQE PIC Queues
- Configuring the Junos OS to Support Eight Queues on IQ Interfaces for T Series and M320 Routers
- BA Classifiers and ToS Translation Tables
- Configuring ToS Translation Tables
- Configuring Hierarchical Layer 2 Policers on IQE PICs
- Configuring Excess Bandwidth Sharing on IQE PICs
- Configuring Rate-Limiting Policers for High Priority Low-Latency Queues on IQE PICs
- Applying Scheduler Maps and Shaping Rate to Physical Interfaces on IQ PICs
- Applying Scheduler Maps to Chassis-Level Queues
- play_arrow Configuring Class of Service on Ethernet IQ2 and Enhanced IQ2 PICs
- CoS on Enhanced IQ2 PICs Overview
- CoS Features and Limitations on IQ2 and IQ2E PICs (M Series and T Series)
- Differences Between Gigabit Ethernet IQ and Gigabit Ethernet IQ2 PICs
- Shaping Granularity Values for Enhanced Queuing Hardware
- Ethernet IQ2 PIC RTT Delay Buffer Values
- Configuring BA Classifiers for Bridged Ethernet
- Setting the Number of Egress Queues on IQ2 and Enhanced IQ2 PICs
- Configuring the Number of Schedulers per Port for Ethernet IQ2 PICs
- Applying Scheduler Maps to Chassis-Level Queues
- CoS for L2TP Tunnels on Ethernet Interface Overview
- Configuring CoS for L2TP Tunnels on Ethernet Interfaces
- Configuring LNS CoS for Link Redundancy
- Example: Configuring L2TP LNS CoS Support for Link Redundancy
- Configuring Shaping on 10-Gigabit Ethernet IQ2 PICs
- Configuring Per-Unit Scheduling for GRE Tunnels Using IQ2 and IQ2E PICs
- Understanding Burst Size Configuration on IQ2 and IQ2E Interfaces
- Configuring Burst Size for Shapers on IQ2 and IQ2E Interfaces
- Configuring a CIR and a PIR on Ethernet IQ2 Interfaces
- Example: Configuring Shared Resources on Ethernet IQ2 Interfaces
- Configuring and Applying IEEE 802.1ad Classifiers
- Configuring Rate Limits to Protect Lower Queues on IQ2 and Enhanced IQ2 PICs
- Simple Filters Overview
- Configuring a Simple Filter
- play_arrow Configuring Class of Service on 10-Gigabit Ethernet LAN/WAN PICs with SFP+
- CoS on 10-Gigabit Ethernet LAN/WAN PIC with SFP+ Overview
- BA and Fixed Classification on 10-Gigabit Ethernet LAN/WAN PIC with SFP+ Overview
- DSCP Rewrite for the 10-Gigabit Ethernet LAN/WAN PIC with SFP+
- Configuring DSCP Rewrite for the 10-Gigabit Ethernet LAN/WAN PIC
- Queuing on 10-Gigabit Ethernet LAN/WAN PICs Properties
- Mapping Forwarding Classes to CoS Queues on 10-Gigabit Ethernet LAN/WAN PICs
- Scheduling and Shaping on 10-Gigabit Ethernet LAN/WAN PICs Overview
- Example: Configuring Shaping Overhead on 10-Gigabit Ethernet LAN/WAN PICs
- play_arrow Configuring Class of Service on Enhanced Queuing DPCs
- Enhanced Queuing DPC CoS Properties
- Configuring Rate Limits on Enhanced Queuing DPCs
- Configuring WRED on Enhanced Queuing DPCs
- Configuring MDRR on Enhanced Queuing DPCs
- Configuring Excess Bandwidth Sharing
- Configuring Customer VLAN (Level 3) Shaping on Enhanced Queuing DPCs
- Simple Filters Overview
- Configuring Simple Filters on Enhanced Queuing DPCs
- Configuring a Simple Filter
- play_arrow Configuring Class of Service on MICs, MPCs, and MLCs
- CoS Features and Limitations on MIC and MPC Interfaces
- Dedicated Queue Scaling for CoS Configurations on MIC and MPC Interfaces Overview
- Verifying the Number of Dedicated Queues Configured on MIC and MPC Interfaces
- Scaling of Per-VLAN Queuing on Non-Queuing MPCs
- Increasing Available Bandwidth on Rich-Queuing MPCs by Bypassing the Queuing Chip
- Flexible Queuing Mode
- Multifield Classifier for Ingress Queuing on MX Series Routers with MPC
- Example: Configuring a Filter for Use as an Ingress Queuing Filter
- Ingress Queuing Filter with Policing Functionality
- Ingress Rate Limiting on MX Series Routers with MPCs
- Rate Shaping on MIC and MPC Interfaces
- Per-Priority Shaping on MIC and MPC Interfaces Overview
- Example: Configuring Per-Priority Shaping on MIC and MPC Interfaces
- Configuring Static Shaping Parameters to Account for Overhead in Downstream Traffic Rates
- Example: Configuring Static Shaping Parameters to Account for Overhead in Downstream Traffic Rates
- Traffic Burst Management on MIC and MPC Interfaces Overview
- Understanding Hierarchical Scheduling for MIC and MPC Interfaces
- Configuring Ingress Hierarchical CoS on MIC and MPC Interfaces
- Configuring a CoS Scheduling Policy on Logical Tunnel Interfaces
- Per-Unit Scheduling and Hierarchical Scheduling for MPC Interfaces
- Managing Dedicated and Remaining Queues for Static CoS Configurations on MIC and MPC Interfaces
- Excess Bandwidth Distribution on MIC and MPC Interfaces Overview
- Bandwidth Management for Downstream Traffic in Edge Networks Overview
- Scheduler Delay Buffering on MIC and MPC Interfaces
- Managing Excess Bandwidth Distribution on Static Interfaces on MICs and MPCs
- Drop Profiles on MIC and MPC Interfaces
- Intelligent Oversubscription on MIC and MPC Interfaces Overview
- Jitter Reduction in Hierarchical CoS Queues
- Example: Reducing Jitter in Hierarchical CoS Queues
- CoS on Ethernet Pseudowires in Universal Edge Networks Overview
- CoS Scheduling Policy on Logical Tunnel Interfaces Overview
- Configuring CoS on an Ethernet Pseudowire for Multiservice Edge Networks
- CoS for L2TP LNS Inline Services Overview
- Configuring Static CoS for an L2TP LNS Inline Service
- CoS on Circuit Emulation ATM MICs Overview
- Configuring CoS on Circuit Emulation ATM MICs
- Understanding IEEE 802.1p Inheritance push and swap from a Transparent Tag
- Configuring IEEE 802.1p Inheritance push and swap from the Transparent Tag
- CoS on Application Services Modular Line Card Overview
- play_arrow Configuring Class of Service on Aggregated, Channelized, and Gigabit Ethernet Interfaces
- Limitations on CoS for Aggregated Interfaces
- Policer Support for Aggregated Ethernet Interfaces Overview
- Understanding Schedulers on Aggregated Interfaces
- Examples: Configuring CoS on Aggregated Interfaces
- Hierarchical Schedulers on Aggregated Ethernet Interfaces Overview
- Configuring Hierarchical Schedulers on Aggregated Ethernet Interfaces
- Example: Configuring Scheduling Modes on Aggregated Interfaces
- Enabling VLAN Shaping and Scheduling on Aggregated Interfaces
- Class of Service on demux Interfaces
- Example: Configuring Per-Unit Schedulers for Channelized Interfaces
- Applying Layer 2 Policers to Gigabit Ethernet Interfaces
-
- play_arrow Configuration Statements and Operational Commands
list Table of Contents
ON THIS PAGE
Example: Applying Scheduler Maps and Shaping Rate to DLCIs
date_range
29-Nov-23
This example shows how to apply scheduler maps and shaping rates to individual logical interfaces.
Requirements
This example uses the following hardware and software components:
Junos OS Release 7.4 or later running on router line cards that support Intelligent Queuing (IQ).
Junos OS Release 13.2 or later running on MX Series routers containing 16x10GE MPC or MPC3E line cards.
Junos OS Release 13.3 or later running on MX Series routers containing MPC4E line cards.
Junos OS Release 15.1 or later running on MX Series routers containing MPC6E line cards.
Overview
By default, output scheduling is not enabled on logical interfaces. Logical interfaces without shaping configured share a default scheduler. Logical interface scheduling (also called per-unit scheduling) allows you to enable multiple output queues on a logical interface and associate customized scheduling and shaping for each queue.
This example shows how to define schedulers for logical interfaces through the direct use of scheduler maps and shaping rates.
In this example, we associate the scheduler sched-map-logical-0 with logical interface unit 0 on physical interface t3-1/0/0, and allocate 10 Mbps of transmission bandwidth
to the logical interface. We also associate the scheduler sched-map-logical-1 with logical interface unit 1 on the same physical
interface, t3-1/0/0, and allocate 20 Mbps of transmission
bandwidth to the logical interface.
The allocated bandwidth is shared among the individual forwarding classes in the scheduler map. Although these schedulers are configured on a single physical interface, they are independent from each other. Traffic on one logical interface unit does not affect the transmission priority, bandwidth allocation, or drop behavior on the other logical interface unit.
For a similar example, see Example: Applying Scheduling and Shaping to VLANs.
Configuration
CLI Quick Configuration
To quickly configure this example, copy the
following commands, paste them into a text file, remove any line breaks,
change any details necessary to match your network configuration,
and then copy and paste the commands into the CLI at the [edit] hierarchy level.
content_copy zoom_out_map
set interfaces t3-1/0/0:1 per-unit-scheduler set interfaces t3-1/0/0:1 encapsulation frame-relay set interfaces t3-1/0/0:1 unit 0 dlci 100 set interfaces t3-1/0/0:1 unit 0 family inet address 10.1.1.0/24 set interfaces t3-1/0/0:1 unit 1 dlci 101 set interfaces t3-1/0/0:1 unit 1 family inet address 10.1.1.1/24 set class-of-service interfaces t3-1/0/0:1 unit 0 scheduler-map sched-map-logical-0 set class-of-service interfaces t3-1/0/0:1 unit 0 shaping-rate 10m set class-of-service interfaces t3-1/0/0:1 unit 1 scheduler-map sched-map-logical-1 set class-of-service interfaces t3-1/0/0:1 unit 1 shaping-rate 20m set class-of-service scheduler-maps sched-map-logical-0 forwarding-class best-effort scheduler sched-best-effort-0 set class-of-service scheduler-maps sched-map-logical-0 forwarding-class assured-forwarding scheduler sched-bronze-0 set class-of-service scheduler-maps sched-map-logical-0 forwarding-class expedited-forwarding scheduler sched-silver-0 set class-of-service scheduler-maps sched-map-logical-0 forwarding-class network-control scheduler sched-gold-0 set class-of-service scheduler-maps sched-map-logical-1 forwarding-class best-effort scheduler sched-best-effort-1 set class-of-service scheduler-maps sched-map-logical-1 forwarding-class assured-forwarding scheduler sched-bronze-1 set class-of-service scheduler-maps sched-map-logical-1 forwarding-class expedited-forwarding scheduler sched-silver-1 set class-of-service scheduler-maps sched-map-logical-1 forwarding-class network-control scheduler sched-gold-1 set class-of-service schedulers sched-best-effort-0 transmit-rate 4m set class-of-service schedulers sched-bronze-0 transmit-rate 3m set class-of-service schedulers sched-silver-0 transmit-rate 2m set class-of-service schedulers sched-gold-0 transmit-rate 1m set class-of-service schedulers sched-best-effort-1 transmit-rate 8m set class-of-service schedulers sched-bronze-1 transmit-rate 6m set class-of-service schedulers sched-silver-1 transmit-rate 4m set class-of-service schedulers sched-gold-1 transmit-rate 2m
Procedure
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see the Junos OS CLI User Guide.
Configure the device interfaces.
content_copy zoom_out_map[edit interfaces]user@PE1# set t3-1/0/0:1 per-unit-scheduler user@PE1# set t3-1/0/0:1 encapsulation frame-relay user@PE1# set t3-1/0/0:1 unit 0 dlci 100 user@PE1# set t3-1/0/0:1 unit 0 family inet address 10.1.1.0/24 user@PE1# set t3-1/0/0:1 unit 1 dlci 101 user@PE1# set t3-1/0/0:1 unit 1 family inet address 10.1.1.1/24Define the schedulers.
content_copy zoom_out_map[edit class-of-service]user@PE1# set schedulers sched-best-effort-0 transmit-rate 4m user@PE1# set schedulers sched-bronze-0 transmit-rate 3m user@PE1# set schedulers sched-silver-0 transmit-rate 2m user@PE1# set schedulers sched-gold-0 transmit-rate 1m user@PE1# set schedulers sched-best-effort-1 transmit-rate 8m user@PE1# set schedulers sched-bronze-1 transmit-rate 6m user@PE1# set schedulers sched-silver-1 transmit-rate 4m user@PE1# set schedulers sched-gold-1 transmit-rate 2mDefine the scheduler maps.
content_copy zoom_out_map[edit class-of-service]user@PE1# set scheduler-maps sched-map-logical-0 forwarding-class best-effort scheduler sched-best-effort-0 user@PE1# set scheduler-maps sched-map-logical-0 forwarding-class assured-forwarding scheduler sched-bronze-0 user@PE1# set scheduler-maps sched-map-logical-0 forwarding-class expedited-forwarding scheduler sched-silver-0 user@PE1# set scheduler-maps sched-map-logical-0 forwarding-class network-control scheduler sched-gold-0 user@PE1# set scheduler-maps sched-map-logical-1 forwarding-class best-effort scheduler sched-best-effort-1 user@PE1# set scheduler-maps sched-map-logical-1 forwarding-class assured-forwarding scheduler sched-bronze-1 user@PE1# set scheduler-maps sched-map-logical-1 forwarding-class expedited-forwarding scheduler sched-silver-1 user@PE1# set scheduler-maps sched-map-logical-1 forwarding-class network-control scheduler sched-gold-1Apply the scheduler maps and shaping rates to the logical interfaces.
content_copy zoom_out_map[edit class-of-service]user@PE1# set interfaces t3-1/0/0:1 unit 0 scheduler-map sched-map-logical-0 user@PE1# set interfaces t3-1/0/0:1 unit 0 shaping-rate 10m user@PE1# set interfaces t3-1/0/0:1 unit 1 scheduler-map sched-map-logical-1 user@PE1# set interfaces t3-1/0/0:1 unit 1 shaping-rate 20m
Results
From configuration mode, confirm your configuration
by entering the show interfaces and show class-of-service commands. If the output does not display the intended configuration,
repeat the instructions in this example to correct the configuration.
content_copy zoom_out_map
[edit interfaces]
user@PE1# show
t3-1/0/0:1 {
encapsulation frame-relay;
per-unit-scheduler;
}
[edit class-of-service]
user@PE1# show
interfaces {
t3-1/0/0:1 {
unit 0 {
scheduler-map sched-map-logical-0;
shaping-rate 10m;
}
unit 1 {
scheduler-map sched-map-logical-1;
shaping-rate 20m;
}
}
}
scheduler-maps {
sched-map-logical-0 {
forwarding-class best-effort scheduler sched-best-effort-0;
forwarding-class assured-forwarding scheduler sched-bronze-0;
forwarding-class expedited-forwarding scheduler sched-silver-0;
forwarding-class network-control scheduler sched-gold-0;
}
sched-map-logical-1 {
forwarding-class best-effort scheduler sched-best-effort-1;
forwarding-class assured-forwarding scheduler sched-bronze-1;
forwarding-class expedited-forwarding scheduler sched-silver-1;
forwarding-class network-control scheduler sched-gold-1;
}
}
schedulers {
sched-best-effort-0 {
transmit-rate 4m;
}
sched-bronze-0 {
transmit-rate 3m;
}
sched-silver-0 {
transmit-rate 2m;
}
sched-gold-0 {
transmit-rate 1m;
}
sched-best-effort-1 {
transmit-rate 8m;
}
sched-bronze-1 {
transmit-rate 6m;
}
sched-silver-1 {
transmit-rate 4m;
}
sched-gold-1 {
transmit-rate 2m;
}
}
If you are done configuring the device, enter commit from configuration mode.
