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J-series™ Services Router Configuration Guide Techpubs Home Report an Error Collapse TOC Show Index Entire manual as PDF		About This Guide Objectives Audience Document Conventions Related Juniper Networks Documentation Documentation Feedback Requesting Support Using Services Router 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 Disabling the CONFIG Button Entering Operational Mode Commands During Configuration Managing Configuration Files with the CLI Loading a New Configuration File Saving a Configuration File Interfaces Overview Interfaces Terms Network Interfaces Media Types Network Interface Naming J-series Interface Naming Conventions Understanding CLI Output for J-series Interfaces Data Link Layer Overview Physical Addressing Network Topology Error Notification Frame Sequencing Flow Control Data Link Sublayers MAC Addressing Ethernet Interface Overview Ethernet Access Control and Transmission Collisions and Detection Collision Detection Backoff Algorithm Collision Domains and LAN Segments Repeaters Bridges and Switches Broadcast Domains Ethernet Frames T1 and E1 Interfaces Overview T1 Overview E1 Overview T1 and E1 Signals Encoding AMI Encoding B8ZS and HDB3 Encoding T1 and E1 Framing Superframe (D4) Framing for T1 Extended Superframe (ESF) Framing for T1 T1 and E1 Loopback Signals T3 and E3 Interfaces Overview Multiplexing DS1 Signals DS2 Bit Stuffing DS3 Framing M13 Asynchronous Framing C-Bit Parity Framing Serial Interface Overview Serial Transmissions Signal Polarity Serial Clocking Modes Serial Interface Transmit Clock Inversion DTE Clock Rate Reduction Serial Line Protocols EIA-530 RS-232 RS-422/449 V.35 X.21 ADSL Interface Overview ADSL Systems ADSL2 and ADSL2+ Asynchronous Transfer Mode ISDN Interface Overview ISDN Channels ISDN Interfaces Typical ISDN Network NT Devices and S and T Interfaces U Interface ISDN Call Setup Layer 2 ISDN Connection Initialization Layer 3 ISDN Session Establishment Interface Physical Properties Bit Error Rate Testing Interface Clocking Data Stream Clocking Explicit Clocking Signal Transmission Frame Check Sequences Cyclic Redundancy Checks and Checksums Two-Dimensional Parity Physical Encapsulation on an Interface Frame Relay Virtual Circuits Switched and Permanent Virtual Circuits Data-Link Connection Identifiers Congestion Control and Discard Eligibility Point-to-Point Protocol Link Control Protocol CHAP Authentication Network Control Protocols Magic Numbers CSU/DSU Devices Point-to-Point Protocol over Ethernet PPPoE Discovery PPPoE Sessions High-Level Data Link Control HDLC Stations HDLC Operational Modes Interface Logical Properties Protocol Families Common Protocol Suites Other Protocol Suites IPv4 Addressing IPv4 Classful Addressing IPv4 Dotted Decimal Notation IPv4 Subnetting IPv4 Variable-Length Subnet Masks IPv6 Addressing IPv6 Address Representation IPv6 Address Types IPv6 Address Scope IPv6 Address Structure Virtual LANs Special Interfaces Discard Interface Loopback Interface Management Interface Services Interfaces MLPPP and MLFR MLFR Frame Relay Forum CRTP Configuring Network Interfaces Before You Begin Configuring Network Interfaces with Quick Configuration Configuring an E1 Interface with Quick Configuration Configuring an E3 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-over-ADSL Network Interface with a Configuration Editor Configuring CHAP on the ATM-over-ADSL Interface (Optional) Configuring Compressed Real-Time Transport Protocol (CRTP) 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-over-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-over-ADSL Interface Configuring a PPPoE Interface (Required) Configuring CHAP (Optional) Verifying a PPPoE Configuration Configuring ISDN ISDN Terms ISDN Overview ISDN Interfaces Before You Begin Configuring ISDN Interfaces with a Configuration Editor Adding an ISDN Interface (Required) Configuring a Dialer Interface (Required) Enabling an ISDN Interface as a Secondary Connection (Optional) Configuring Dial-on-Demand Connectivity (Optional) Configuring a Dialer Filter Applying the Dial-on-Demand Dialer Filter to the Dialer Interface Configuring Bandwidth-on-Demand (Optional) Configuring a Dialer Interface for Bandwidth-on-Demand Configuring an ISDN Interface for Bandwidth-on-Demand Configuring Dial-on-Demand Routing (Optional) Configuring the Dial-on-Demand Dialer Filter Applying the Dial-on-Demand Dialer Filter to the Dialer Interface Configuring Dialer Watch (Optional) Adding a Dialer Watch Interface on the Services Router Configuring the ISDN Interface for Dialer Watch Configuring Dial-on-Demand Routing with OSPF Support (Optional) Configuring Dialer Profiles (Optional) Verifying the ISDN 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 IBGP and EBGP Route Selection Local Preference AS Path Origin 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 OSPF Dial-on-Demand Circuits 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 CLNS VPNs CLNS Terms CLNS Overview Before You Begin Configuring CLNS with a Configuration Editor Configuring a VPN Routing Instance (Required) Configuring ES-IS Configuring IS-IS for CLNS Configuring CLNS Static Routes Configuring BGP for CLNS Verifying CLNS VPN Configuration Configuring IPSec for Secure Packet Exchange IPSec Tunnel Overview Security Associations 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 Rule 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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