Table of Contents - JUNOS 9.3 MPLS Applications Configuration Guide

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About This Guide

Objectives

Audience

Supported Routing Platforms

Using the Indexes

Using the Examples in This Manual

Documentation Conventions

List of Technical Publications

Documentation Feedback

Requesting Technical Support

Overview

Traffic Engineering Overview

Components of Traffic Engineering

Packet Forwarding Component

Packet Forwarding Based on Label Swapping
How a Packet Traverses an MPLS Backbone

Information Distribution Component

Path Selection Component

Offline Planning and Analysis

Signaling Component

Flexible LSP Calculation and Configuration

Complete MPLS Applications Configuration Mode Statements

[edit logical-systems] Hierarchy Level
[edit protocols connections] Hierarchy Level
[edit protocols ldp] Hierarchy Level
[edit protocols link-management] Hierarchy Level
[edit protocols mpls] Hierarchy Level
[edit protocols rsvp] Hierarchy Level

MPLS

MPLS Overview

MPLS Standards

Link-Layer Support

MPLS and Traffic Engineering

Label Description

Special Labels

Label Allocation

Operations on Labels

Routers in an LSP

How a Packet Travels Along an LSP

Types of LSPs

Scope of LSPs

Constrained-Path LSP Computation

How CSPF Selects a Path
Path Selection Tie-Breaking
Computing Paths Offline

LSPs on an Overloaded Router

Fate Sharing

IGP Shortcuts

Enabling IGP Shortcuts
LSPs Qualified in Shortcut Computations
IGP Shortcut Applications
IGP Shortcuts and Routing Table
Router Requirements
IGP Shortcuts and VPN Environments

Advertising LSPs into IGPs

IP and MPLS Packets on Aggregated Interfaces

MPLS Applications

BGP Destinations
IGP and BGP Destinations
Selecting a Forwarding LSP Next Hop

MPLS and Routing Tables

MPLS and Traffic Protection

Fast Reroute

Fast Reroute Overview
Detour Merging Process
Detour Computations
Fast Reroute Path Optimization

Automatic Bandwidth Allocation

Point-to-Multipoint LSPs

MPLS Load Balancing Based on the IP Header and MPLS Labels

MPLS Configuration Statements

MPLS Configuration Statements
Minimum MPLS Configuration

MPLS-Signaled LSPs Configuration Guidelines

Configuring the Ingress Router for Signaled LSPs

Creating a Named Path

Examples: Creating a Named Path

Configuring Alternate Backup Paths Using Fate Sharing

Configuring Fate Sharing
Implications for CSPF
Example: Configuring Fate Sharing

Configuring All Other MPLS Routers for Signaled LSPs

Configuring an LSP

Configuring the Address of the Egress and Ingress Routers

Configuring the Address of the Egress Router
Preventing the Addition of Egress Router Addresses to Routing Tables
Configuring the Address of the Ingress Router

Configuring the Primary and Secondary LSPs

Configuring Primary and Secondary Paths for an LSP
Configuring the Revert Timer
Specifying Path Selection

Configuring the Description

Configuring Fast Reroute

Configuring the Optimization Interval for Fast Reroute Paths

Configuring Addresses to Associate with the LSP

Configuring Path Connection Retry Information

Configuring the LSP Metric

Configuring a Dynamic LSP Metric
Configuring a Static LSP Metric

Configuring CSPF Tie Breaking

Configuring Load Balancing for MPLS LSPs

Using the First MPLS Label in the Hash Key
Using the Second MPLS Label in the Hash Key
Using the Third MPLS Label in the Hash Key
Using the IP Payload in the Hash Key
Using the First Two Labels and the IP Payload in the Hash Key
Configuring Load Balancing for MPLS LSPs Without CSPF

Disabling Normal TTL Decrementing

Configuring MPLS Soft Preemption

Configuring Automatic Bandwidth Allocation

Configuring MPLS Statistics for Automatic Bandwidth Allocation

Configuring Automatic Bandwidth Allocation on an LSP

Configuring the Automatic Bandwidth Allocation Interval
Configuring the Maximum and Minimum Bounds of the LSP’s Bandwidth
Configuring Automatic Bandwidth Adjustment Threshold
Configuring a Limit on Bandwidth Overflow Samples
Configuring Passive Bandwidth Utilization Monitoring

Requesting an Automatic Bandwidth Allocation Adjustment

Disabling Constrained-Path LSP Computation

Configuring Administrative Groups

Configuring the LSP Preference

Configuring Path Route Recording

Configuring Class of Service for MPLS

Class of Service for MPLS Overview
Configuring the MPLS CoS Bits
Rewriting IEEE 802.1p Packet Headers with the MPLS CoS Value

Configuring Adaptive LSPs

Configuring Priority and Preemption for LSPs

Optimizing Signaled LSPs

Configuring the Smart Optimize Timer

Configuring the Maximum Path Length

Configuring the Path Bandwidth

Configuring the Standby State

Configuring LSP Hold Time

Configuring LDP Tunneling

Enabling RSVP

Configuring MPLS Exception Monitoring

Improving TED Accuracy with RSVP PathErr Messages

PathErr Messages
Identifying the Problem Link
Configuring the Router to Improve TED Accuracy

Examples: Configuring Signaled LSPs

Example: Constrained-Path LSP, JUNOS Makes All Forwarding Decisions
Example: Explicit-Path LSP
Example: Constrained-Path LSP, JUNOS Makes Most Forwarding Decisions, Hop Constraints Accounted For
Example: Constrained-Path LSP, JUNOS Makes Most Forwarding Decisions, Secondary Path Is Explicit

Configuring MPLS over GRE Tunnels

Example: Configuring MPLS over GRE Tunnels

Configuring IPv6 Tunnels over MPLS

IPv6 over MPLS Standards

Configuring an IPv4 MPLS Tunnel to Carry IPv6 Traffic

Configuring IPv6 on Both Core-Facing and CE Router–Facing Interfaces
Configuring MPLS and RSVP Between PE Routers
Enabling IPv6 Tunneling in MPLS
Configuring Multiprotocol BGP to Carry IPv6 Traffic

Configuring ICMP Message Tunneling

LSP Attributes for GMPLS

DiffServ-Aware Traffic Engineering Configuration Guidelines

DiffServ-Aware Traffic Engineering Standards

DiffServ-Aware Traffic Engineering Terminology

DiffServ-Aware Traffic Engineering Overview

DiffServ-Aware Traffic Engineering Features

DiffServ-Aware Traffic Engineered LSPs

DiffServ-Aware Traffic Engineered LSPs Overview
DiffServ-Aware Traffic Engineered LSPs Operation

Multiclass LSPs

Multiclass LSP Overview
Establishing a Multiclass LSP on the Differentiated Services Domain

Configuring DiffServ-Aware Traffic Engineering

Configuring the Bandwidth Model

Configuring Traffic Engineering Classes

Requirements and Limitations for the Traffic Engineering Class Matrix

Configuring Class of Service

Bandwidth Oversubscription Overview

LSP Size Oversubscription

Link Size Oversubscription

Class Type Oversubscription and Local Oversubscription Multipliers

Class Type Bandwidth and the LOM
LOM Calculation for the MAM and Extended MAM Bandwidth Models
LOM Calculation for the Russian Dolls Bandwidth Model
Example: LOM Calculation

Configuring the Bandwidth Subscription Percentage for LSPs

Bandwidth Subscription Troubleshooting

Configuring DiffServ-Aware Traffic Engineering for LSPs

Configuring Class of Service for the Interfaces
Configuring IGP
Configuring a Traffic Engineered LSP
Configuring Policing for LSPs
Configuring Fast Reroute for Traffic Engineered LSPs

Configuring Multiclass LSPs

Configuring Class of Service for the Interfaces
Configuring the IGP
Configuring a Multiclass LSP
Configuring Policing for Multiclass LSPs
Configuring Fast Reroute for Multiclass LSPs

Static and Explicit-Path LSP Configuration Guidelines

Configuring Static LSPs

Configuring the Ingress Router for Static LSPs

Example: Configuring the Ingress Router

Configuring the Intermediate and Egress Routers for Static LSPs

Example: Configuring an Intermediate Router
Example: Configuring an Egress Router

Configuring Static Unicast Routes for Point-to-Multipoint LSPs

Configuring Explicit-Path LSPs

Point-to-Multipoint LSP Configuration Guidelines

Configuring Primary and Branch LSPs

Configuring the Primary Point-to-Multipoint LSP

Configuring a Branch LSP for the Point-to-Multipoint LSP

Configuring the Branch LSP as a Dynamic Path
Configuring the Branch LSP as a Static Path

Example: Configuring Point-to-Multipoint LSPs

Configuring Link Protection for Point-to-Multipoint LSPs

Configuring Graceful Restart for Point-to-Multipoint LSPs

Configuring a Multicast RPF Check Policy for Point-to-Multipoint LSPs

Example: Multicast RPF Check Policy for Point-to-Multipoint LSPs

Configuring Ingress PE Router Redundancy for Point-to-Multipoint LSPs

Binding Point-to-Point LSPs to PE Routers and Backup PE Router Groups

Ensuring Compatibility with JUNOS 9.1 and Earlier Releases for P2MP LSPs

Miscellaneous MPLS Properties Configuration Guidelines

Configuring MPLS to Pop the Label on the Ultimate-Hop Router

Configuring Traffic Engineering for LSPs

Using RSVP and LDP Routes for Traffic Forwarding
Using RSVP and LDP Routes for Forwarding in VPNs
Using RSVP and LDP Routes for Forwarding But Not Route Selection
Advertising the LSP Metric in Summary LSAs

Enabling Interarea Traffic Engineering

Enabling Inter-AS Traffic Engineering for LSPs

Inter-AS Traffic Engineering Requirements
Inter-AS Traffic Engineering Limitations
Configuring OSPF Passive TE Mode

Configuring MPLS to Gather Statistics

Controlling MPLS System Log Messages and SNMP Traps

Configuring MPLS Firewall Filters and Policers

Configuring MPLS Firewall Filters

Examples: Configuring MPLS Firewall Filters

Configuring Policers for LSPs

LSP Policer Limitations

Example: Configuring an LSP Policer

Configuring Automatic Policers

Configuring Automatic Policers for LSPs
Configuring Automatic Policers for DiffServ-Traffic Engineering LSPs
Disabling Automatic Policing on an LSP
Example: Configuring Automatic Policers for LSPs

Writing Different DSCP and EXP Values in MPLS-Tagged IP Packets

Configuring MPLS Rewrite Rules

Rewriting the EXP Bits of All Three Labels of an Outgoing Packet
Rewriting MPLS and IPv4 Packet Headers

Configuring BFD for MPLS LSPs

Configuring BFD for RSVP LSPs

Pinging LSPs

Pinging an MPLS LSP
Pinging a P2MP LSP
Pinging an MPLS LSP Endpoint
Pinging a CCC LSP
Pinging a Layer 3 VPN
LSP Ping and Traceroute Based on RFC 4379

Tracing MPLS and LSP Packets and Operations

Summary of MPLS Configuration Statements

adaptive

adjust-interval

adjust-threshold

adjust-threshold-overflow-limit

admin-down

admin-group

admin-group (for Interfaces)
admin-group (for LSPs)

admin-groups

advertisement-hold-time

allow-fragmentation

associate-backup-pe-groups

bandwidth-percent

bfd-liveness-detection

exclude (for Administrative Groups)
exclude (for Fast Reroute)

include-all (for Administrative Groups)
include-all (for Fast Reroute)

include-any

include-any (for Administrative Groups)
include-any (for Fast Reroute)

label-switched-path

maximum-bandwidth

metric

minimum-bandwidth

monitor-bandwidth

no-install-to-address

optimize-aggressive

optimize-timer

p2mp

p2mp-lsp-next-hop

rsvp-error-hold-time

secondary

select

signal-bandwidth

smart-optimize-timer

traffic-engineering

JUNOS Software RSVP Protocol Implementation

RSVP Operation

RSVP Operation Overview
RSVP Authentication
RSVP and IGP Hello Packets and Timers

RSVP Message Types

Path Messages
Resv Messages
PathTear Messages
ResvTear Messages
PathErr Messages
ResvErr Messages
ResvConfirm Messages

RSVP Reservation Styles

RSVP Refresh Reduction

MTU Signaling in RSVP

How the Correct MTU Is Signaled in RSVP
Determining an Outgoing MTU Value
MTU Signaling in RSVP Limitations

Link Protection

Fast Reroute, Node Protection, and Link Protection
Multiple Bypass LSPs

Node Protection

RSVP Graceful Restart

RSVP Graceful Restart Standard
RSVP Graceful Restart Terminology
RSVP Graceful Restart Operation
Processing the Restart Cap Object

RSVP Configuration Guidelines

Minimum RSVP Configuration

Configuring RSVP and MPLS

Example: Configuring RSVP and MPLS

Configuring RSVP Interface Properties

Configuring RSVP Refresh Reduction

Determining the Refresh Reduction Capability of RSVP Neighbors

Configuring the RSVP Hello Interval

Configuring RSVP Authentication

Configuring the Bandwidth Subscription for Class Types

Configuring the RSVP Update Threshold on an Interface

Configuring RSVP for Unnumbered Interfaces

Configuring Node Protection or Link Protection

Configuring Node Protection or Link Protection on an LSP

Configuring Link Protection on the Interfaces Used by the LSPs

Configuring Bypass LSPs

Configuring the Next-Hop or Next-Next-Hop Node Address for Bypass LSPs

Configuring Administrative Groups for Bypass LSPs

Configuring the Bandwidth for Bypass LSPs

Configuring the Class of Service for Bypass LSPs

Configuring the Hop Limit for Bypass LSPs

Configuring the Maximum Number of Bypass LSPs

Disabling CSPF for Bypass LSPs

Disabling Node Protection for Bypass LSPs

Configuring the Optimization Interval for Bypass LSPs

Configuring an Explicit Path for Bypass LSPs

Configuring the Amount of Bandwidth Subscribed for Bypass LSPs

Configuring Priority and Preemption for Bypass LSPs

Configuring RSVP Graceful Restart

Enabling Graceful Restart on the Router
Disabling Graceful Restart for RSVP
Disabling RSVP Helper Mode
Configuring the Maximum Helper Recovery Time
Configuring the Maximum Helper Restart Time

Configuring RSVP LSP Load Balancing

Configuring RSVP Timers

Preempting RSVP Sessions

Configuring MTU Signaling in RSVP

Enabling MTU Signaling in RSVP
Enabling Packet Fragmentation

Configuring RSVP to Pop the Label on the Ultimate-Hop Router

Disabling Adjacency Down and Neighbor Down Notification in IS-IS and OSPF

Enabling Ultimate-Hop Popping on Point-to-Multipoint LSPs

Tracing RSVP Protocol Traffic

Examples: Tracing RSVP Protocol Traffic

Summary of RSVP Configuration Statements

admin-group

aggregate

authentication-key

fast-reroute optimize-timer

graceful-deletion-timeout

link-protection (MPLS)
link-protection (RSVP)

load-balance

max-bypasses

no-adjacency-down-notification

no-aggregate

no-cspf

no-neighbor-down-notification

no-p2mp-sublsp

no-reliable

node-link-protection

JUNOS Software LDP Protocol Implementation

LDP Operation

LDP Label Filtering

Tunneling LDP LSPs in RSVP LSPs

Tunneling LDP LSPs in RSVP LSPs Overview
Label Operations

LDP Message Types

Discovery Messages
Session Messages
Advertisement Messages
Notification Messages

LDP Graceful Restart

LDP Configuration Guidelines

Minimum LDP Configuration

Enabling and Disabling LDP

Configuring the LDP Hello Interval

Configuring the LDP Hold Time

Configuring the LDP Keepalive Interval

Configuring the LDP Keepalive Timeout

Configuring LDP Route Preferences

Configuring LDP Graceful Restart

Enabling Graceful Restart
Disabling LDP Graceful Restart or Helper Mode
Configuring Recovery Time and Maximum Recovery Time

Configuring LDP Received-Label Filtering

Examples: Configuring Received-Label Filtering

Configuring LDP Outbound-Label Filtering

Examples: Configuring Outbound-Label Filtering

Configuring LDP Transport Address Control

Configuring the LDP Egress Policy

Example: Configuring the LDP Egress Policy

Configuring FEC Deaggregation

Configuring Policers for LDP FECs

Configuring LDP IPv4 FEC Filtering

Configuring BFD for LDP LSPs

Configuring ECMP-Aware BFD for RSVP LSPs

Configuring LDP LSP Traceroute

Collecting LDP Statistics

LDP Statistics Output
Disabling LDP Statistics on the Penultimate-Hop Router
LDP Statistics Limitations

Tracing LDP Protocol Traffic

Tracing LDP Protocol Traffic at the Protocol and Routing Instance Levels
Tracing LDP Protocol Traffic Within FEC
Examples: Tracing LDP Protocol Traffic

Configuring Miscellaneous LDP Properties

Configuring LDP to Use the IGP Route Metric
Preventing Ingress Routes from Being Added to inet.0
Multiple-Instance LDP and Carrier-of-Carriers VPNs
Configuring MPLS and LDP to Pop the Label on the Ultimate-Hop Router
Enabling LDP over RSVP-Established LSPs
Enabling LDP over RSVP-Established LSPs in Heterogeneous Networks
Configuring the TCP MD5 Signature for an LDP Session
Disabling SNMP Traps for LDP
Enabling Strict Targeted Hellos
Configuring LDP Synchronization with the IGP
Configuring the Label Withdrawal Timer
Ignoring the LDP Subnet Check

Summary of LDP Configuration Statements

allow-subnet-mismatch
authentication-key
bfd-liveness-detection
deaggregate
disable
ecmp
egress-policy
explicit-null
export
graceful-restart
hello-interval
helper-disable
hold-time
ignore-lsp-metrics
import
interface
keepalive-interval
keepalive-timeout
l2-smart-policy
label-withdrawal-delay
ldp
ldp-synchronization
log-updown
maximum-neighbor-recovery-time
no-deaggregate
no-forwarding
oam
periodic-traceroute
policing
preference
recovery-time
session
strict-targeted-hellos
traceoptions
track-igp-metric
traffic-statistics
transport-address

CCC and TCC

CCC and TCC Overview

CCC Overview
TCC Overview
CCC and TCC Graceful Restart

CCC and TCC Configuration Guidelines

Configuring CCC

Configuring Layer 2 Switching Cross-Connects

Defining the Encapsulation for Layer 2 Switching Cross-Connects

ATM Encapsulation for Layer 2 Switching Cross-Connects
Ethernet Encapsulation for Layer 2 Switching Cross-Connects
Ethernet VLAN Encapsulation for Layer 2 Switching Cross-Connects
Aggregated Ethernet Encapsulation for Layer 2 Switching Cross-Connects
Frame Relay Encapsulation for Layer 2 Switching Cross-Connects
PPP and Cisco HDLC Encapsulation for Layer 2 Switching Cross-Connects

Defining the CCC Connection for Layer 2 Switching Cross-Connects

Configuring MPLS

Example: Configuring Layer 2 Switching Cross-Connects

Configuring MPLS LSP Tunnel Cross-Connects

Defining the CCC Encapsulation for LSP Tunnel Cross-Connects
Defining the CCC Connection for LSP Tunnel Cross-Connects
Example: Configuring LSP Tunnel Cross-Connects

Configuring LSP Stitching Cross-Connects

Example: Configuring LSP Stitching Cross-Connects

Transmitting Nonstandard BPDUs

Configuring TCC

Defining the Encapsulation for the Layer 2 Switching TCCs

PPP and Cisco HDLC Encapsulation for Layer 2 Switching TCCs
ATM Encapsulation for Layer 2 Switching TCCs
Frame Relay Encapsulation for Layer 2 Switching TCCs
Ethernet Encapsulation for Layer 2 Switching TCCs
Ethernet Extended VLAN Encapsulation for Layer 2 Switching TCCs
ARP Configuration for Ethernet TCC Encapsulations

Defining the Connection for the Layer 2 Switching TCC

Configuring MPLS

Configuring CCC and TCC Graceful Restart

Configuring CCC Switching for Point-to-Multipoint LSPs

Configuring the Point-to-Multipoint LSP Switch on the Ingress PE Router
Configuring the Point-to-Multipoint LSP Switch on the Egress PE Router

Summary of CCC and TCC Configuration Statements

connections

encapsulation

encapsulation (Logical Interface)
encapsulation (Physical Interface)

interface-switch

lsp-switch

p2mp-receive-switch

p2mp-transmit-switch

remote-interface-switch

GMPLS

GMPLS Overview

GMPLS Standards
Terms and Acronyms
Overview
GMPLS Operation
GMPLS and OSPF
GMPLS and CSPF
GMPLS Features

GMPLS Configuration Guidelines

Configuring LMP

Configuring LMP Traffic Engineering Links

Configuring the Local IP Address for the Traffic Engineering Link
Configuring the Remote IP Address for the Traffic Engineering Link
Configuring the Remote ID for the Traffic Engineering Link

Configuring LMP Peers

Configuring the LMP Peer ID
Configuring the Control Channel Interface
Configuring the LMP Control Channel Interface for the Peer
Configuring the Remote IP Address for the LMP Control Channel
Configuring the Hello Message Attributes for the LMP Control Channel
Configuring Message Attributes for the LMP Control Channel
Configuring the Local Peer to Wait for the Remote Peer
Configuring the Traffic Engineering Link for the LMP Peer
Disabling the Traffic Engineering Link for the LMP Peer

Configuring Peer Interfaces in RSVP and OSPF

Configuring Peer Interfaces in RSVP
Configuring Peer Interfaces in OSPF
Configuring the Hello Interval for Peer Interfaces

Configuring MPLS Paths for GMPLS

Tracing LMP Traffic

Configuring MPLS LSPs for GMPLS

Configuring the Encoding Type
Configuring the GPID
Configuring the Signal Bandwidth Type
Configuring GMPLS Bidirectional LSPs
Allowing Non-Packet GMPLS LSPs to Establish Paths Through a JUNOS-based Router

Gracefully Tearing Down GMPLS LSPs

Temporarily Deleting a GMPLS LSP
Permanently Deleting a GMPLS LSP
Configuring the Graceful Deletion Timeout Interval

RSVP LSP Hierarchy Configuration Guidelines

RSVP LSP Hierarchy Standard

RSVP LSP Hierarchy Terminology

RSVP LSP Hierarchy Overview

RSVP LSP Hierarchy
Advertising the Forwarding Adjacency with OSPF

Configuring the RSVP LSP Hierarchy

Configuring an RSVP LSP

Configuring a Forwarding Adjacency

Configuring the Local IP Address for the Forwarding Adjacency
Configuring the Remote IP Address for the Forwarding Adjacency
Configuring the LSP for the Forwarding Adjacency

Configuring RSVP for a Forwarding Adjacency

Advertising a Forwarding Adjacency Using OSPF

Summary of GMPLS Configuration Statements

disable (for GMPLS)
disable (for OSPF)

hello-dead-interval

hello-interval

hello-interval (for LMP)
hello-interval (for OSPF)

interface

label-switched-path

link-management

lmp-control-channel

peer-interface (for OSPF)
peer-interface (for RSVP)

remote-address

remote-address (for LMP Control Channel)
remote-address (for LMP Traffic Engineering)

remote-id

retransmission-interval

retransmit-interval

Index
Index of Statements and Commands

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