J-series™ Services Router Configuration Guide

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About This Guide

Objectives
Audience
How to Use This Guide
Document Conventions
Related Juniper Networks Documentation
Documentation Feedback
Requesting Support

Using J-series Configuration Tools

Configuration Tools Terms

Configuration Tools Overview

Editing and Committing a Configuration

J-Web Configuration Options

CLI Configuration Commands

Filtering Configuration Command Output

Before You Begin

Using J-Web Quick Configuration

Using the J-Web Configuration Editor

Editing and Committing the Clickable Configuration

Editing the Clickable Configuration
Discarding Parts of a Candidate Configuration
Committing a Clickable Configuration

Viewing the Configuration Text

Editing and Committing the Configuration Text

Uploading a Configuration File

Managing Configuration Files with the J-Web Interface

Configuration Database and History Overview
Displaying Users Editing the Configuration
Comparing Configuration Files
Downloading a Configuration File
Loading a Previous Configuration File
Setting, Viewing, or Deleting the Rescue Configuration

Using the CLI Configuration Editor

Entering and Exiting Configuration Mode

Navigating the Configuration Hierarchy

Modifying the Configuration

Adding or Modifying a Statement or Identifier
Deleting a Statement or Identifier
Copying a Statement
Renaming an Identifier
Inserting an Identifier
Deactivating a Statement or Identifier

Committing a Configuration with the CLI

Verifying a Configuration
Committing a Configuration and Exiting Configuration Mode
Committing a Configuration That Requires Confirmation
Scheduling and Canceling a Commit
Loading a Previous Configuration File with the CLI
Setting or Deleting the Rescue Configuration with the CLI

Entering Operational Mode Commands During Configuration

Managing Configuration Files with the CLI

Loading a New Configuration File
Saving a Configuration File

Configuring Network Interfaces

Network Interfaces Terms

Interfaces Overview

Network Interface Types
Interfaces and Interface Naming

Before You Begin

Configuring Network Interfaces with Quick Configuration

Configuring an E1 Interface with Quick Configuration
Configuring a Fast Ethernet Interface with Quick Configuration
Configuring a T1 Interface with Quick Configuration
Configuring a T3 Interface with Quick Configuration
Configuring a Serial Interface with Quick Configuration

Configuring Network Interfaces with a Configuration Editor

Adding a Network Interface with a Configuration Editor
Adding an ATM-for-ADSL Network Interface with a Configuration Editor
Deleting a Network Interface with a Configuration Editor

Verifying Interface Configuration

Configuring Point-to-Point Protocol over Ethernet

PPPoE Terms

PPPoE Overview

PPPoE Interfaces

Fast Ethernet Interface
ATM-for-ADSL Interface

PPPoE Stages

PPPoE Discovery Stage
PPPoE Session Stage

Optional CHAP Authentication

Before You Begin

Configuring PPPoE with a Configuration Editor

Setting the Appropriate Encapsulation on the Interface (Required)

Configuring PPPoE Encapsulation on an Ethernet Interface
Configuring PPPoE Encapsulation on an ATM-for-ADSL Interface

Configuring a PPPoE Interface (Required)

Configuring CHAP (Optional)

Verifying a PPPoE Configuration

Routing Overview

Routing Terms

Routing Overview

Networks and Subnetworks
Autonomous Systems
Interior and Exterior Gateway Protocols
Routing Tables
Forwarding Tables
Dynamic and Static Routing
Route Advertisements
Route Aggregation

RIP Overview

Distance-Vector Routing Protocols
Maximizing Hop Count
RIP Packets
Split Horizon and Poison Reverse Efficiency Techniques
Limitations of Unidirectional Connectivity

OSPF Overview

Link-State Advertisements
Role of the Designated Router
Path Cost Metrics
Areas and Area Border Routers
Role of the Backbone Area
Stub Areas and Not-So-Stubby Areas

BGP Overview

Point-to-Point Connections

BGP Messages for Session Establishment

BGP Messages for Session Maintenance

Multiple Exit Discriminator

Scaling BGP for Large Networks

Route Reflectors—for Added Hierarchy
Confederations—for Subdivision

Configuring Static Routes

Static Routing Overview

Static Route Preferences

Qualified Next Hops

Control of Static Routes

Route Retention
Readvertisement Prevention
Forced Rejection of Passive Route Traffic

Default Properties

Before You Begin

Configuring Static Routes with Quick Configuration

Configuring Static Routes with a Configuration Editor

Configuring a Basic Set of Static Routes (Required)
Controlling Static Route Selection (Optional)
Controlling Static Routes in the Routing and Forwarding Tables (Optional)
Defining Default Behavior for All Static Routes (Optional)

Verifying the Static Route Configuration

Configuring a RIP Network

RIP Overview

RIP Traffic Control with Metrics
Authentication

Before You Begin

Configuring a RIP Network with Quick Configuration

Configuring a RIP Network with a Configuration Editor

Configuring a Basic RIP Network (Required)

Controlling Traffic in a RIP Network (Optional)

Controlling Traffic with the Incoming Metric
Controlling Traffic with the Outgoing Metric

Enabling Authentication for RIP Exchanges (Optional)

Enabling Authentication with Plain-Text Passwords
Enabling Authentication with MD5 Authentication

Verifying the RIP Configuration

Configuring an OSPF Network

OSPF Overview

Enabling OSPF
OSPF Areas
Path Cost Metrics

Before You Begin

Configuring an OSPF Network with Quick Configuration

Configuring an OSPF Network with a Configuration Editor

Configuring the Router Identifier (Required)

Configuring a Single-Area OSPF Network (Required)

Configuring a Multiarea OSPF Network (Optional)

Creating the Backbone Area
Creating Additional OSPF Areas
Configuring Area Border Routers

Configuring Stub and Not-So-Stubby Areas (Optional)

Tuning an OSPF Network for Efficient Operation

Controlling Route Selection in the Forwarding Table
Controlling the Cost of Individual Network Segments
Enabling Authentication for OSPF Exchanges
Controlling Designated Router Election

Verifying an OSPF Configuration

Configuring BGP Sessions

BGP Overview

BGP Peering Sessions
IBGP Full Mesh Requirement
Route Reflectors and Clusters
BGP Confederations

Before You Begin

Configuring BGP Sessions with Quick Configuration

Configuring BGP Sessions with a Configuration Editor

Configuring a Point-to-Point Peering Session (Required)
Configuring BGP Within a Network (Required)
Configuring a Route Reflector (Optional)
Configuring BGP Confederations (Optional)

Verifying a BGP Configuration

Multiprotocol Label Switching Overview

MPLS and VPN Terms

MPLS Overview

Label Switching

Label-Switched Paths

Label-Switching Routers

Labels

Label Operations

Penultimate Hop Popping

LSP Establishment

Static LSPs
Dynamic LSPs

Signaling Protocols Overview

Label Distribution Protocol

LDP Operation
LDP Messages

Resource Reservation Protocol

RSVP Fundamentals
Bandwidth Reservation Requirement
Explicit Route Objects
Constrained Shortest Path First
Link Coloring

VPN Overview

VPN Components

VPN Routing Requirements

VPN Routing Information

VRF Instances
Route Distinguishers
Route Targets to Control the VRF Table

Types of VPNs

Layer 2 VPNs
Layer 2 Circuits
Layer 3 VPNs

Configuring Signaling Protocols for Traffic Engineering

Signaling Protocol Overview

LDP Signaling Protocol
RSVP Signaling Protocol

Before You Begin

Configuring LDP and RSVP with a Configuration Editor

Configuring LDP-Signaled LSPs
Configuring RSVP-Signaled LSPs

Verifying an MPLS Configuration

Verifying an LDP-Signaled LSP
Verifying an RSVP-Signaled LSP

Configuring Virtual Private Networks

VPN Configuration Overview

Sample VPN Topology
Basic Layer 2 VPN Configuration
Basic Layer 2 Circuit Configuration
Basic Layer 3 VPN Configuration

Before You Begin

Configuring VPNs with a Configuration Editor

Configuring Interfaces Participating in a VPN

Configuring Protocols Used by a VPN

Configuring MPLS for VPNs
Configuring a BGP Session
Configuring Routing Options for VPNs
Configuring an IGP and a Signaling Protocol
Configuring LDP for Signaling
Configuring RSVP for Signaling
Configuring a Layer 2 Circuit

Configuring a VPN Routing Instance

Configuring a VPN Routing Policy

Configuring a Routing Policy for Layer 2 VPNs
Configuring a Routing Policy for Layer 3 VPNs

Verifying a VPN Configuration

Pinging a Layer 2 VPN
Pinging a Layer 3 VPN
Pinging a Layer 2 Circuit

Configuring IPSec for Secure Packet Exchange

IPSec Tunnel Overview

Security Associations
Securing Incoming Traffic
Translating Outgoing Traffic

Before You Begin

Configuring an IPSec Tunnel with Quick Configuration

Configuring an IPSec Tunnel with a Configuration Editor

Configuring IPSec Services Interfaces
Configuring IPSec Service Sets
Configuring an IPSec Stateful Firewall Filter
Configuring a NAT Pool

Verifying the IPSec Tunnel Configuration

Multicast Overview

Multicast Terms

Multicast Architecture

Upstream and Downstream Interfaces
Subnetwork Leaves and Branches
Multicast IP Address Ranges
Notation for Multicast Forwarding States

Dense and Sparse Routing Modes

Strategies for Preventing Routing Loops

Reverse-Path Forwarding for Loop Prevention
Shortest-Path Tree for Loop Prevention
Administrative Scoping for Loop Prevention

Multicast Protocol Building Blocks

Configuring a Multicast Network

Before You Begin

Configuring a Multicast Network with a Configuration Editor

Configuring SAP and SDP (Optional)
Configuring IGMP (Required)
Configuring the PIM Static RP (Optional)
Configuring a PIM RPF Routing Table (Optional)

Verifying a Multicast Configuration

Policy, Firewall Filter, and Class-of-Service Overview

Policy, Firewall Filter, and CoS Terms

Routing Policy Overview

Routing Policy Components

Routing Policy Terms
Routing Policy Match Conditions
Routing Policy Actions
Default and Final Actions

Applying Routing Policies

Firewall Filter Overview

Stateful and Stateless Firewall Filters
Process for Configuring a Stateful Firewall Filter and NAT
Summary of Stateful Firewall Filter and NAT Match Conditions and Actions
Planning a Stateless Firewall Filter
Stateless Firewall Filter Match Conditions, Actions, and Action Modifiers

Class-of-Service Overview

Benefits of DiffServ CoS

DSCPs and Forwarding Service Classes

JUNOS CoS Functions

How Forwarding Classes and Schedulers Work

Default Forwarding Class Queue Assignments
Default Scheduler Settings
Default Behavior Aggregate (BA) Classifiers
DSCP Rewrites
Sample BA Classification

Configuring Routing Policies

Before You Begin

Configuring a Routing Policy with a Configuration Editor

Configuring the Policy Name (Required)
Configuring a Policy Term (Required)
Rejecting Known Invalid Routes (Optional)
Injecting OSPF Routes into the BGP Routing Table (Optional)
Grouping Source and Destination Prefixes in a Forwarding Class (Optional)
Configuring a Policy to Prepend the AS Path (Optional)
Configuring Damping Parameters (Optional)

Configuring Firewall Filters and NAT

Before You Begin

Configuring a Stateful Firewall Filter with Quick Configuration

Configuring a Stateful Firewall Filter with a Configuration Editor

Configuring a Stateless Firewall Filter with a Configuration Editor

Stateless Firewall Filter Strategies

Strategy for a Typical Stateless Firewall Filter
Strategy for Handling Packet Fragments

Configuring a Routing Engine Firewall Filter for Services and Protocols from Trusted Sources

Configuring a Routing Engine Firewall Filter to Protect Against TCP and ICMP Floods

Configuring a Routing Engine Firewall Filter to Handle Fragments

Applying a Stateless Firewall Filter to an Interface

Verifying Firewall Filter Configuration

Configuring Class of Service with DiffServ

Before You Begin

Configuring CoS with DiffServ with a Configuration Editor

Configuring a Policer for a Firewall Filter (Required)
Configuring and Applying a Firewall Filter for a Multifield Classifier (Required)
Assigning Forwarding Classes to Output Queues (Required)
Configuring and Applying Rewrite Rules (Required)
Configuring and Applying Behavior Aggregate Classifiers (Required)
Configuring RED Drop Profiles for Assured Forwarding Congestion Control (Required)
Configuring Schedulers (Optional)
Configuring and Applying Scheduler Maps (Optional)
Configuring and Applying Virtual Channels (Optional)
Configuring and Applying Adaptive Shaping (Optional)

Verifying a DiffServ Configuration

Index

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