JUNOS 9.4 Routing Protocols Configuration Guide DVD Home Techpubs Home Report an Error Collapse TOC List of Figures List of Tables Index Index of Statements and Commands Entire manual as PDF		About This Guide Objectives Audience Supported Platforms Using the Indexes Using the Examples in This Manual Documentation Conventions List of Technical Publications Documentation Feedback Requesting Technical Support Routing Protocols Concepts Routing Databases Routing Protocol Databases JUNOS Routing Tables Forwarding Tables How the Routing and Forwarding Tables Are Synchronized Configuring Interfaces Route Preferences Alternate and Tiebreaker Preferences How the Active Route Is Determined Multiple Active Routes Default Route Preference Values Equal-Cost Paths and Load Sharing IPv6 IPv6 Standards IPv6 Packet Headers Header Structure Extension Headers IPv6 Addressing Address Representation Address Types Address Scope Address Structure Complete Routing and Routing Protocol Configuration Statements [edit logical-systems] Hierarchy Level [edit protocols] Hierarchy Level [edit routing-instances] Hierarchy Level [edit routing-options] Hierarchy Level Protocol-Independent Routing Properties Overview Protocol-Independent Routing Properties Configuration Statements Minimum Protocol-Independent Routing Properties Configuration Configuring Routing Tables and Routes Creating Routing Tables Example: Creating Routing Tables Configuring Static Routes Specifying the Destination of the Static Route Specifying the Next Hop of the Static Route Specifying an Independent Preference for a Static Route Example: Configuring Independent Preferences for an IPv4 Static Route Example: Configuring Independent Preferences for an IPv6 Static Route Example: Configuring Independent Preferences for an Unnumbered Ethernet Interface Specifying an LSP as the Next Hop for a Static Route Installing a Static Route into More than One Routing Table Examples: Installing a Static Route into More than One Routing Table Configuring a Connectionless Network Services Static Route Example: Configuring a Static CLNS Route Specifying Static Route Options Specifying the Route Metric Specifying the Route Preference Specifying Community Information Specifying the AS Path Specifying the OSPF Tag Specifying Whether a Route Is Installed in the Forwarding Table Specifying Whether the Route Is Permanently Installed in the Forwarding Table Specifying Whether Inactive Routes Are Removed from the Routing or Forwarding Table Specifying When the Route Can Be Readvertised Specifying When the Route Can Be Resolved to a Prefix That Is Not Directly Connected Configuring Bidirectional Forwarding Detection Configuring a Default Route Propagating Static Routes into Routing Protocols Examples: Configuring Static Routes Configuring Aggregate Routes Specifying the Destination of the Aggregate Route Specifying Aggregate Route Options Specifying the Route Metric Specifying the Route Preference Specifying a Next Hop for a Route Specifying Community Information Specifying the AS Path Specifying Which AS Numbers to Include in the Aggregate Route Specifying the OSPF Tag Specifying Whether Inactive Routes Are Removed from the Routing or Forwarding Table Specifying Policy with Aggregate Routes Advertising Aggregate Routes Configuring Generated Routes Specifying the Destination of a Generated Route Specifying Generated Route Options Specifying the Route Metric Specifying the Route Preference Specifying a Next Hop for a Route Specifying Community Information Specifying the AS Path Specifying the OSPF Tag Specifying Which AS Numbers to Include in the Generated Route Specifying Whether Inactive Routes Are Removed from the Routing or Forwarding Table Specifying Policy with Generated Routes Configuring Martian Addresses Adding Martian Addresses Deleting Martian Addresses Configuring a Flow Route Configuring the Match Condition Configuring the Action Validating Flow Routes Applying a Filter to a Forwarding Table Configuring Other Protocol-Independent Routing Properties Configuring the AS Number Configuring the Router Identifier Configuring AS Confederation Members Configuring Route Recording for Flow Aggregation Creating Routing Table Groups Examples: Creating Routing Table Groups Configuring How Interface Routes Are Imported into Routing Tables Configuring Multicast Scoping Example: Configuring Multicast Scoping Enabling Multicast on an Interface Configuring Additional Source-Specific Multicast Groups Configuring Multicast Forwarding Cache Limits Configuring Per-Packet Load Balancing Examples: Configuring Per-Packet Load Balancing Configuring Unicast Reverse-Path-Forwarding Check Example: Configuring Unicast RPF Configuring Graceful Restart Configuring a Route Distinguisher Configuring a Dynamic Tunnel Configuring Logging for the Routing Protocol Process Examples: Configuring Logging for the Routing Protocol Process Configuring Route Resolution Enabling an Indirect Next Hop Enabling Nonstop Routing Tracing Global Routing Protocol Operations Examples: Tracing Global Routing Protocol Operations Disabling Distributed Periodic Packet Management on the Packet Forwarding Engine Enabling Source Routing Configuring a Timer to Delay Multiple Exit Discriminator IGP Updates Logical System Overview Overview Logical Systems and Virtual Routers Logical System Configuration Statements Minimum Logical System Configuration Logical System Configuration Guidelines Configuring a Logical System Logical Systems Configuration Statement logical-systems Summary of Protocol-Independent Routing Properties Configuration Statements active aggregate as-path auto-export autonomous-system bfd-liveness-detection brief color community confederation destination-networks disable discard dynamic-tunnels export export-rib fate-sharing filter flow forwarding-cache forwarding-table full generate graceful-restart import import-policy import-rib independent-domain indirect-next-hop input install instance-export instance-import interface interface (Multicast via Static Routes) interface (Multicast Scoping) interface-routes lsp-next-hop martians maximum-paths maximum-prefixes med-igp-update-interval metric metric (Aggregate, Generated, or Static Route) metric (Qualified Next Hop on Static Route) multicast no-install no-readvertise no-retain nonstop-routing options p2mp-lsp-next-hop passive policy ppm preference prefix qualified-next-hop readvertise resolution resolution-ribs resolve restart-duration retain rib rib (General) rib (Route Resolution) rib-group rib-groups route-distinguisher-id route-record router-id routing-options scope source-address source-routing ssm-groups static tag threshold traceoptions tunnel-type unicast-reverse-path Routing Instances Overview Routing Instances Configuration Guidelines Configuring Routing Instances Routing Instances Minimum Configuration BGP IS-IS Layer 2 VPN LDP MSDP Multiprotocol BGP-Based Multicast VPNs OSPF OSPFv3 PIM RIP VPLS Configuring Multiple Instances of BGP Example: Configuring Multiple Instances of BGP Configuring Multiple Instances of IS-IS Example: Configuring Multiple Routing Instances of IS-IS Configuring Multiple Instances of LDP Configuring Multiple Instances of MSDP Configuring Multiple Instances of OSPF Example: Configuring Multiple Routing Instances of OSPF Configuring Multiple Instances of PIM Configuring Multiple Instances of RIP Configuring an Instance Configuring VPNs Configuring a Virtual Switch Configuring an Instance Type Configuring a VRF Routing Instance Configuring a Non-VPN VRF Routing Instance Configuring a VPLS Routing Instance Configuring a Route Distinguisher Configuring Filter-Based Forwarding Configuring Class-of-Service-Based Forwarding Configuring Secondary VRF Import and Export Policy Configuring Policy-Based Export for Routing Instances Example: Configuring Policy-Based Export for an Overlapping VPN Example: Configuring Policy-Based Export for a Nonforwarding Instance Configuring a VRF Table Label Configuring a VRF Target Configuring an OSPF Domain ID Examples: Configuring an OSPF Domain ID Configuring Route Limits for Routing Tables Configuring an Independent AS Domain Summary of Routing Instances Configuration Statements description forwarding-options instance-type interface no-vrf-advertise protocols route-distinguisher routing-instances routing-options vrf-export vrf-import vrf-table-label vrf-target Multitopology Routing Overview Routing Table Naming Conventions for Multitopology Routing Routing Protocol Support for Multitopology Routing Filter-Based Forwarding Support Multitopology Routing Standards Configuring Multitopology Routing Configuring Topologies Configuring Multitopology Routing in OSPF Configuring Topologies and SPF Options for MT-OSPF Configuring a Prefix Export Limit for MT-OSPF Configuring a Topology to Appear Overloaded Configuring Interface Properties for MT-OSPF Disabling MT-OSPF on an OSPF Interface Disabling MT-OSPF on a Virtual Link Advertising MPLS Label-Switched Paths into MT-OSPF Configuring Other MT-OSPF Properties Configuring Multitopology Routing in Static Routes Configuring Multitopology Routing in BGP BGP Route Resolution in Multitopology Routing Configuring Filter-Based Forwarding for Multitopology Routing Summary of Multitopology Routing Configuration Statements community rib topologies topology topology (Filter-Based Forwarding) topology (Multitopology Routing) topology (OSPF) topology (OSPF Interface) topology-id IS-IS Overview IS-IS Standards IS-IS Terminology ISO Network Addresses IS-IS Packets Persistent Route Reachability IS-IS Extensions to Support Traffic Engineering Configuring IS-IS IGP Shortcuts IS-IS Extensions to Support Route Tagging IS-IS Configuration Guidelines Minimum IS-IS Configuration Configuring IS-IS Authentication Configuring Interface-Specific Properties Enabling Checksum Configuring the CSNP Interval Configuring Mesh Groups Modifying the Interface Metric Modifying the Maximum Number of Areas Advertised Enabling Wide Metrics for Traffic Engineering Configuring Route Preferences Configuring a Prefix Export Limit Configuring IS-IS Levels on an Interface Disabling IS-IS on a Level Example: Disabling IS-IS on a Level Advertising Interface Addresses Without Running IS-IS Configuring Authentication for Hello Packets Modifying the Hello Interval Modifying the Hold-Time Value Modifying the IS-IS Metric Modifying the Traffic Engineering Metric Configuring the Priority for Becoming the Designated Router Configuring the Router to Advertise Without Running IS-IS Modifying the LSP Interval Configuring Label Distribution Protocol Synchronization Modifying the LSP Lifetime Advertising Label-Switched Paths into IS-IS Configuring the Router to Appear Overloaded Configuring SPF Options for IS-IS Configuring Graceful Restart IS-IS and Multipoint Configurations Configuring Point-to-Point Interfaces Configuring IS-IS Traffic Engineering Attributes Configuring IS-IS to Use IGP Shortcuts Configuring IS-IS to Ignore the Metric of RSVP Label-Switched Paths Disabling IS-IS Support for Traffic Engineering Installing IPv4 Routes into the Multicast Routing Table Configuring the BFD Protocol Configuring Loose Authentication Check Disabling Adjacency Hold-Down Timers Configuring Hello Packet Padding Configuring Support for Connectionless Network Services Example: Configuring CLNS for IS-IS Disabling IS-IS Disabling IPv4 Routing Disabling IPv6 Routing Configuring IS-IS Routing Policy Examples: Configuring IS-IS Routing Policy Configuring IS-IS Multicast Topologies Example: Configuring IS-IS Multicast Topologies Configuring IS-IS IPv6 Unicast Topologies Installing a Default Route to the Nearest Level 1/Level 2 Router Tracing IS-IS Protocol Traffic Examples: Tracing IS-IS Protocol Traffic Summary of IS-IS Configuration Statements authentication-key authentication-type bfd-liveness-detection checksum clns-routing csnp-interval disable disable (IS-IS) disable (LDP Synchronization) export external-preference family graceful-restart hello-authentication-key hello-authentication-type hello-interval hello-padding hold-time hold-time (IS-IS) hold-time (LDP Synchronization) ignore-attached-bit ignore-lsp-metrics interface ipv4-multicast ipv4-multicast-metric ipv6-multicast ipv6-multicast-metric ipv6-unicast ipv6-unicast-metric isis label-switched-path ldp-synchronization level level (Global IS-IS) level (IS-IS Interfaces) loose-authentication-check lsp-interval lsp-lifetime max-areas mesh-group metric multicast-rpf-routes no-adjacency-holddown no-authentication-check no-csnp-authentication no-hello-authentication no-ipv4-multicast no-ipv4-routing no-ipv6-multicast no-ipv6-routing no-ipv6-unicast no-psnp-authentication no-unicast-topology overload passive point-to-point preference prefix-export-limit priority reference-bandwidth rib-group shortcuts spf-options te-metric topologies traceoptions traffic-engineering wide-metrics-only ES-IS Overview Overview ES-IS Configuration Guidelines Minimum ES-IS Configuration Configuring ES-IS on an Interface Configuring the Hello Interval Configuring the End System Configuration Timer Configuring Graceful Restart for ES-IS Configuring the Preference Value for ES-IS Tracing ES-IS Protocol Traffic Summary of ES-IS Configuration Statements disable end-system-configuration-timer esis graceful-restart hello-interval interface preference traceoptions OSPF Overview OSPF Protocol Overview OSPF Version 3 OSPF Standards OSPF Area Terminology Areas Area Border Routers Backbone Areas AS Boundary Routers Stub Areas Not-So-Stubby Areas Transit Areas OSPF Routing Algorithm OSPF Packets OSPF Packet Header Hello Packets Database Description Packets Link-State Request Packets Link-State Update Packets Link-State Acknowledgment Packets Link-State Advertisement Packet Types External Metrics Designated Router OSPF Extensions to Support Traffic Engineering Configuring OSPF IGP Shortcuts OSPF Configuration Guidelines Minimum OSPF Configuration Configuring the Backbone Area and Other Areas Configuring the Backbone Area Configuring a Nonbackbone Area Configuring a Stub Area Configuring a Not-So-Stubby Area Configuring an OSPF Virtual Link Example: Configuring an OSPF Virtual Link Disabling NSSA Support on an ASBR ABR Disabling Compatibility with RFC 1583 Configuring OSPF on Router Interfaces Configuring an Interface on a Broadcast or Point-to-Point Network Configuring an Interface on a Point-to-Multipoint Network Configuring an Interface on a Nonbroadcast, Multiaccess Network Configuring an OSPF Demand Circuit Interface Configuring Multiarea Adjacency in OSPFv2 Configuring Multiple Address Families for OSPFv3 Configuring Authentication for OSPFv2 Example: Configuring IPsec Authentication for an OSPFv2 Interface Example: Configuring a Transition of MD5 Keys Example: Configuring MD5 Authentication Configuring Authentication for OSPFv3 Configuring a Prefix Export Limit Configuring the Priority for Becoming the Designated Router Configuring Route Summarization Modifying the Interface Metric Configuring Route Preferences Configuring OSPF Timers Modifying the Hello Interval Controlling the LSA Retransmission Interval Modifying the Router Dead Interval Specifying the Transit Delay Configuring the BFD Protocol Configuring Label Distribution Protocol Synchronization with the IGP Configuring Graceful Restart Configuring SPF Options for OSPF Advertising Interface Addresses Without Running OSPF Configuring OSPF Passive Traffic Engineering Mode Advertising Label-Switched Paths into OSPF Configuring the Router to Appear Overloaded Enabling OSPF Traffic Engineering Support Example: Enabling OSPF Traffic Engineering Support Modifying the Traffic Engineering Metric Configuring OSPF Routing Policy Configuring Import and Export Policies for Network Summaries Configuring Priority for Prefixes in Import Policy Example: Configuring a Route Filter Policy to Specify Priority for Prefixes Learned Through OSPF Configuring OSPF Routing Table Groups Configuring a Sham Link Configuring a Peer Interface Tracing OSPF Protocol Traffic Examples: Tracing OSPF Protocol Traffic Summary of OSPF Configuration Statements area area-range authentication bfd-liveness-detection dead-interval default-lsa default-metric demand-circuit disable disable (LDP Synchronization) disable (OSPF) domain-id domain-vpn-tag export external-preference graceful-restart hello-interval hold-time ignore-lsp-metrics import inter-area-prefix-export inter-area-prefix-import interface interface-type ipsec-sa label-switched-path ldp-synchronization lsp-metric-into-summary md5 metric metric-type neighbor network-summary-export network-summary-import no-nssa-abr no-rfc-1583 no-summaries nssa ospf ospf3 overload passive peer-interface poll-interval preference prefix-export-limit priority realm reference-bandwidth retransmit-interval rib-group route-type-community secondary sham-link sham-link-remote shortcuts simple-password spf-options stub summaries te-metric traceoptions traffic-engineering traffic-engineering (OSPF) traffic-engineering (Passive TE Mode) transit-delay transmit-interval type-7 virtual-link RIP Overview Protocol Overview RIP Standards RIP Packets RIP Configuration Guidelines Minimum RIP Configuration Defining RIP Global Properties Defining RIP Neighbor Properties Configuring Authentication Modifying the Incoming Metric Configuring RIP Timers Configuring the Number of Route Entries in an Update Message Accepting Packets Whose Reserved Fields Are Nonzero Configuring Update Messages Configuring Routing Table Groups Applying Import Policy Configuring Group-Specific Properties Applying Export Policy Controlling Route Preference Modifying the Outgoing Metric Configuring Graceful Restart Configuring the BFD Protocol Disabling Strict Address Check Tracing RIP Protocol Traffic Example: Tracing RIP Protocol Traffic Example: Configuring RIP Summary of RIP Configuration Statements any-sender authentication-key authentication-type bfd-liveness-detection check-zero export graceful-restart group holddown import message-size metric-in metric-out neighbor no-check-zero preference receive rib-group rip route-timeout send traceoptions update-interval RIPng Overview RIPng Overview RIPng Standards RIPng Packets RIPng Configuration Guidelines Minimum RIPng Configuration Defining RIPng Global Properties Defining RIPng Neighbor Properties Modifying the Incoming Metric Configuring RIPng Timers Configuring Update Messages Applying Import Policy Configuring Group-Specific Properties Applying Export Policy Controlling Route Preference Modifying the Outgoing Metric Configuring Graceful Restart Tracing RIPng Protocol Traffic Example: Configuring RIPng Summary of RIPng Configuration Statements export graceful-restart group holddown import metric-in metric-out neighbor preference receive ripng route-timeout send traceoptions update-interval ICMP Router Discovery Overview ICMP Router Discovery Standards Operation of a Router Discovery Server Router Advertisement Messages ICMP Router Discovery Configuration Guidelines Minimum Router Discovery Server Configuration Configuring the Addresses to Include in Router Advertisements Configuring the Frequency of Router Advertisements Modifying the Router Advertisement Lifetime Tracing ICMP Protocol Traffic Example: Tracing ICMP Protocol Traffic Summary of ICMP Router Discovery Configuration Statements address advertise broadcast disable ignore ineligible interface lifetime max-advertisement-interval min-advertisement-interval multicast priority router-discovery traceoptions Neighbor Discovery Overview Neighbor Discovery Standards Router Discovery Address Resolution Redirect Neighbor Discovery Configuration Guidelines Minimum Neighbor Discovery Configuration Configuring Router Advertisement on an Interface Configuring the Hop Limit Modifying the Default Router Lifetime Enabling Stateful Autoconfiguration Configuring the Frequency of Router Advertisements Modifying the Reachable Time Limit Modifying the Frequency of Neighbor Solicitation Messages Configuring Prefix Information Setting the Prefix for Onlink Determination Setting the Prefix for Stateless Address Autoconfiguration Configuring the Preferred Lifetime Configuring the Valid Lifetime Tracing Router Advertisement Traffic Summary of Neighbor Discovery Router Advertisement Configuration Statements autonomous current-hop-limit default-lifetime interface managed-configuration max-advertisement-interval min-advertisement-interval no-autonomous no-managed-configuration no-on-link no-other-stateful-configuration on-link other-stateful-configuration preferred-lifetime prefix reachable-time retransmit-timer router-advertisement traceoptions valid-lifetime Secure Neighbor Discovery Configuration Guidelines Enabling Secure Neighbor Discovery Configuring Cryptographic Address Parameters Specifying the Pathname for the Key File Specifying the RSA Key Length Configuring Timestamp Parameters Tracing Secure Neighbor Discovery Traffic Summary of Secure Neighbor Discovery Configuration Statements cryptographic-address key-length key-pair neighbor-discovery secure security-level timestamp traceoptions BGP Overview BGP Standards Autonomous Systems AS Paths and Attributes External and Internal BGP BGP Routes BGP Messages Open Messages Update Messages Keepalive Messages Notification Messages BGP Configuration Guidelines Minimum BGP Configuration Enabling BGP Specifying the Local Router’s AS Number Defining an AS Confederation and Its Members Assigning a BGP Identifier Defining BGP Global Properties Defining BGP Groups and Peers Defining a Group with Static Peers Example: Defining a Large Number of Groups with Static Peers Example: Defining a Small Number of Groups with Static Peers for Better Scalability Defining a Group with Dynamic Peers Defining the Group Type Specifying the Peer’s AS Number Defining Group Properties Defining Peer Properties Examples: Enabling BGP Modifying the Hold-Time Value Configuring MTU Discovery Configuring Graceful Restart Advertising an Explicit Null Label Configuring Aggregate Labels for VPNs Configuring Authentication Applying IPsec Security Association Opening a Peer Connection Passively Configuring the Local IP Address Configuring the Multiple Exit Discriminator Metric Defining a MED Metric Directly Using Routing Policy to Define a MED Metric Examples: Configuring the MED Metric Controlling the Aggregator Path Attribute Configuring an EBGP Multihop Session Configuring a Single-Hop EBGP Peer to Accept a Remote Next Hop Example: Configure an Import Routing Policy for an EBGP Peer to Accept a Remote Next Hop Configuring the BGP Local Preference Controlling Route Preference Examples: Controlling Route Preference Configuring Routing Table Path Selection Example: Always Comparing MEDs Configuring BGP to Select Multiple BGP Paths Configuring a Local AS Examples: Configuring a Local AS Removing Private AS Numbers from AS Paths Configuring Route Reflection Examples: Configuring Route Reflection Enabling Route Flap Damping Enabling Multiprotocol BGP Limiting the Number of Prefixes Received on a BGP Peering Session Limiting the Number of Prefixes Accepted on a BGP Peering Session Configuring BGP Routing Table Groups Resolving Routes to PE Routers Located in Other ASs Allowing Labeled and Unlabeled Routes Enabling BGP to Carry Flow-Specification Routes Configuring Flow-Specification Routes for IPv4 Unicast Configuring Flow-Specification Routes for Layer 3 VPNs Enabling BGP to Carry Connectionless Network Services Routes Example: Enabling CLNS Between Two Routers Example: Configuring CLNS Within a VPN Enabling Route Target Filtering Configuring Prefix-Based Outbound Route Filtering Enabling Layer 2 VPN and VPLS Signaling Configuring BGP Routing Policy Applying Routing Policy Applying Policies to Routes Being Imported into the Routing Table from BGP Applying Policies to Routes Being Exported from the Routing Table into BGP Setting BGP to Advertise Inactive Routes Configuring BGP to Advertise the Best External Route to Internal Peers Configuring How Often BGP Exchanges Routes with the Routing Table Disabling Suppression of Route Advertisements Configuring EBGP Peering Using IPv6 Link-Local Address Configuring IPv6 BGP Routes over IPv4 Transport Example: Configuring IPv6 BGP Routes over IPv4 Transport Configuring BGP to Log System Log Messages Describing BGP Router Configuration Blocking Nonpeer TCP Connection Attempts Applying BGP Export Policy to VRF Routes Enabling Next-Hop Reachability Information Configuring the BFD Protocol Configuring the Segment Size for TCP Tracing BGP Protocol Traffic Examples: Tracing BGP Protocol Traffic Summary of BGP Configuration Statements accept-remote-nexthop accepted-prefix-limit advertise-external advertise-inactive advertise-peer-as aggregate-label allow as-override authentication-algorithm authentication-key authentication-key-chain authentication-key-chains bfd-liveness-detection bgp bgp-orf-cisco-mode cluster damping description disable explicit-null export family flow graceful-restart group hold-time import include-mp-next-hop ipsec-sa iso-vpn keep labeled-unicast local-address local-as local-interface local-preference log-updown metric-out mtu-discovery multihop multipath neighbor no-advertise-peer-as no-aggregator-id no-client-reflect no-validate out-delay outbound-route-filter passive path-selection peer-as preference prefix-limit remove-private resolve-vpn rib rib-group route-target tcp-mss traceoptions type vpn-apply-export Indexes Index Index of Statements and Commands