Cisco Systems IOS XR manual Message-digest-key key-idmd5 key clear key encrypted key, RC-156

Page 172

Implementing OSPF on Cisco IOS XR Software

How to Implement OSPF on Cisco IOS XR Software

5.message-digest-key key-idmd5 {key clear key encrypted key}

6.area area-id

7.interface type instance

8.Repeat Step 7 for each interface that must communicate, using the same authentication.

9.exit

10.area area-id

11.authentication [message-digest null]

12.interface type instance

13.Repeat Step 7 for each interface that must communicate, using the same authentication.

14.interface type instance

15.authentication [message-digest null]

16.end or commit

DETAILED STEPS

 

Command or Action

Purpose

Step 1

 

 

configure

Enters global configuration mode.

 

Example:

 

 

 

RP/0/RP0/CPU0:router# configure

 

 

Step 2

 

 

router ospf process-name

Enables OSPF routing for the specified routing process, and

 

 

places the router in router configuration mode.

 

Example:

Note

The process-nameargument is any alphanumeric

 

RP/0/RP0/CPU0:router(config)# router ospf 1

 

string no longer than 40 characters.

Step 3

 

 

router-id{ipv4-address interface-type

Configures a router ID for the OSPF process.

 

interface-instance}

 

 

 

Example:

 

 

 

RP/0/RP0/CPU0:router(config-ospf)# router-id

 

 

 

192.168.4.3

 

 

Step 4

 

 

authentication [message-digest null]

Enables MD5 authentication for the OSPF process.

 

 

This authentication type applies to the entire router

 

Example:

 

process unless overridden by a lower hierarchical level

 

RP/0/RP0/CPU0:router(config-ospf)#

 

such as the area or interface.

 

authentication message-digest

 

 

Step 5

 

 

message-digest-key key-idmd5 {key clear key

Specifies the MD5 authentication key for the OSPF process.

 

encrypted key}

The neighbor routers must have the same key identifier.

 

 

 

Example:

 

 

 

RP/0/RP0/CPU0:router(config-ospf)#

 

 

 

message-digest-key 4 md5 yourkey

 

 

 

 

 

 

Cisco IOS XR Routing Configuration Guide

RC-156

Image 172
Contents Cisco IOS XR Routing Configuration Guide Corporate HeadquartersCisco IOS XR Routing Configuration Guide N T E N T S Enabling BGP Routing RC-ivStandards RC-80 MIBs MIBs Cisco IOS XR for Ospf Version 2 Configuration Example RC-viiOutput of show route backup Command Example RC-201 RC-viiiRecursive Static Routes RC-249 RC-ixRC-x Document Revision History Revision Date Change SummaryObtaining Documentation Cisco.comProduct Documentation DVD Ordering DocumentationReporting Security Problems in Cisco Products Documentation FeedbackCisco Product Security Overview XiiiCisco Technical Support & Documentation Website Obtaining Technical AssistanceXiv Definitions of Service Request Severity Submitting a Service RequestObtaining Additional Publications and Information Xvi Contents Implementing BGP on Cisco IOS XR SoftwareBGP Functional Overview RC-2BGP Router Identifier BGP Default LimitsRC-3 BGP Configuration Configuration ModesBGP Validation of Local Next-Hop Addresses RC-4Router Configuration Mode Global Address Family Configuration ModeNeighbor Configuration Mode Neighbor Address Family Configuration ModeConfiguration Templates RC-6Template Inheritance Rules RC-7RC-8 RC-9 RC-10 Show bgp neighbors Template InheritanceRC-11 Show bgp af-group RC-12Show bgp session-group RC-13Show bgp neighbor-group RC-14No Default Address Family RC-15Routing Policy Enforcement RC-16RC-17 Update Groups BGP Update Generation and Update GroupsBGP Update Group Table PolicyComparing Pairs of Paths RC-19Order of Comparisons RC-20Best Path Change Suppression Multiprotocol BGPRC-21 RC-22 Incongruent Unicast and Multicast RoutesRoute Dampening RC-23BGP Routing Domain Confederation BGP Route ReflectorsMinimizing Flapping RC-24RC-25 Three Fully Meshed iBGP SpeakersRC-26 More Complex BGP Route Reflector ModelDefault Address Family for show Commands How to Implement BGP on Cisco IOS XR SoftwareRC-27 Prerequisites Enabling BGP RoutingRC-28 Command or Action Purpose RestrictionsExample RC-29As a BGP peer RC-30Configuring a Routing Domain Confederation for BGP RC-31RC-32 Resetting eBGP Session Immediately Upon Link Failure RC-33Logging Neighbor Changes Adjusting BGP TimersRC-34 Changing the BGP Default Local Preference Value RC-35Configuring the MED Metric for BGP RC-36RC-37 Configuring BGP Weights RC-38Tuning the BGP Best Path Calculation RC-39Path the least desirable path RC-40Indicating BGP Backdoor Routes RC-41RC-42 Configuring Aggregate Addresses RC-43Redistributing iBGP Routes into IGP RC-44RC-45 Redistributing Prefixes into Multiprotocol BGP RC-46To be redistributed into BGP RC-47Configuring BGP Route Dampening RC-48RC-49 RC-50 RC-51 Applying Policy When Updating the Routing Table RC-52Setting BGP Administrative Distance RC-53RC-54 Configuring a BGP Neighbor Group RC-55RC-56 Bytes for the BGP buffer RC-57Configuring a BGP Neighbor RC-58RC-59 Configuring a Route Reflector for BGP RC-60RC-61 Configuring BGP Route Filtering by Route Policy RC-62RC-63 Disabling Next Hop Processing on BGP Updates RC-64Configuring BGP Community and Extended-Community Filtering RC-65RC-66 Configuring Software to Store Updates from a Neighbor RC-67RC-68 Disabling a BGP Neighbor RC-69RC-70 Resetting Neighbors Using BGP Outbound Soft Reset Resetting Neighbors Using BGP Dynamic Inbound Soft ResetRC-71 Resetting Neighbors Using BGP Hard Reset RC-72Displaying System and Network Statistics Clearing Caches, Tables and DatabasesRC-73 Performance-statistics keyword displays RC-74Monitoring BGP Update Groups RC-75Enabling BGP Example RC-76Displaying BGP Update Groups Example RC-77BGP Confederation Example BGP Neighbor Configuration ExampleRC-78 BGP Route Reflector Example Where to Go NextRC-79 Additional References Related DocumentsStandards MIBsTechnical Assistance RFCsDescription Link RC-81RC-82 Implementing IS-IS on Cisco IOS XR Software RC-83RC-84 IS-IS Functional Overview IS-IS Configuration GroupingRC-85 Multitopology Configuration IPv6 Routing and Configuring IPv6 AddressingIS-IS Interfaces Limit LSP FloodingOverload Bit Configuration During Multitopology Operation Mesh Group ConfigurationMaximum LSP Lifetime and Refresh Interval Single-Topology IPv6 SupportNonstop Forwarding Multitopology IPv6 SupportRC-88 Multiprotocol Label Switching Traffic Engineering Multi-Instance IS-ISOverload Bit on Router RC-89Default Routes Multicast-Intact FeatureAttached Bit on an IS-IS Instance RC-90Enabling IS-IS and Configuring Level 1 or Level 2 Routing How to Implement IS-IS on Cisco IOS XR SoftwareRC-91 RC-92 Configuring Single Topology for IS-IS RC-93Ipv4 address address mask or RC-94Specifying the ipv6 address ipv6-prefix /prefix-length RC-95See the Single-Topology IPv6 Support section on RC-96Level-2-only adjacencies RC-97Configuring Multitopology for IS-IS RC-98RC-99 RC-100 RC-101 Controlling LSP Flooding for IS-IS RC-102Max-lsp-lifetime command RC-103LSP was not received and subsequently resends RC-104RC-105 Configuring Nonstop Forwarding for IS-IS RC-106RC-107 Configuring Authentication for IS-IS RC-108RC-109 Prerequisite Configuring Mpls Traffic Engineering for IS-ISRC-110 RC-111 RC-112 Tuning Adjacencies for IS-IS on Point-to-Point Interfaces RC-113To all interfaces RC-114RC-115 Command or Action Purpose RC-116RC-117 Summary Steps Enabling Multicast-Intact for IS-ISRC-118 Customizing Routes for IS-IS RC-119RC-120 Instance 2 routes into its Level 1 area RC-121Configuring Single-Topology IS-IS for IPv6 Example RC-122Configuring Multitopology IS-IS for IPv6 Example RC-123RC-124 RC-125 RC-126 Implementing Ospf on Cisco IOS XR Software RC-127Information About Implementing Ospf on Cisco IOS XR Software RC-128Ospf Functional Overview RC-129RC-130 Comparison of Cisco IOS XR OSPFv3 and OSPFv2 Importing Addresses into OSPFv3Ospf Hierarchical CLI and CLI Inheritance RC-131Autonomous Systems Ospf Routing ComponentsRC-132 Areas Backbone AreaStub Area Not-so-Stubby Area NssaOspf Process and Router ID RoutersArea Border Routers ABR Autonomous System Boundary Routers AsbrRoute Authentication Methods for Ospf Version Plain Text AuthenticationMD5 Authentication Supported Ospf Network TypesAuthentication Strategies Neighbors and Adjacency for OspfDesignated Router DR for Ospf Key RolloverDefault Route for Ospf Link-State Advertisement Types for Ospf VersionLink-State Advertisement Types for OSPFv3 RC-137Virtual Link and Transit Area for Ospf RC-138Ospf Shortest Path First Throttling Route Redistribution for OspfRC-139 Nonstop Forwarding for Ospf Version RC-140Graceful Restart for OSPFv3 Load Balancing in Ospf Version 2 and OSPFv3RC-141 Modes of Graceful Restart Operation Helper ModeRC-142 Graceful Restart Requirements and Restrictions RC-143How to Implement Ospf on Cisco IOS XR Software RC-144Enabling Ospf RC-145RC-146 Configuring Stub and Not-so-Stubby Area Types RC-147RC-148 Default-information-originate, and no-summary RC-149Configuring Neighbors for Nonbroadcast Networks RC-150RC-151 RC-152 RC-153 RC-154 RC-155 Message-digest-key key-idmd5 key clear key encrypted key RC-156RC-157 Ospf RC-158Default is 1 second RC-159RC-160 RC-161 Section on page RC-138 RC-162RC-163 Examples Summarizing Subnetwork LSAs on an Ospf ABRRC-164 RC-165 Redistributing Routes from One IGP into Ospf RC-166RC-167 Another routing domain RC-168RC-169 Configuring Ospf Shortest Path First Throttling RC-170RC-171 RC-172 Configuring Nonstop Forwarding for Ospf Version RC-173RC-174 Configuring Ospf Version 2 for Mpls Traffic Engineering RC-175Mpls traffic-eng area area-id RC-176RC-177 RC-178 RP/0/RP0/CPU0router# show route ospf 1Sample Output for the show ospf mpls traffic-eng Command RC-179Verifying Ospf Configuration and Operation RC-180Configuring OSPFv3 Graceful Restart RC-181Enabling Graceful Restart Configuring the Maximum Lifetime of a Graceful RestartRC-182 Configuring the Minimum Time Required Between Restarts RC-183Configuring the Helper Level of the Router RC-184Displaying Information About Graceful Restart Displaying the State of the Graceful Restart FeatureRC-185 Enabling Multicast-Intact for OSPFv2 RC-186RC-187 Cisco IOS XR Software Configuration Cisco IOS XR for Ospf Version 2 Configuration ExampleRC-188 CLI Inheritance and Precedence for Ospf Version 2 Example RC-189Mpls TE for Ospf Version 2 Example ABR with Summarization for OSPFv3 ExampleABR Stub Area for OSPFv3 Example RC-190Virtual Link Configured Through Area 1 for OSPFv3 Example ABR Totally Stub Area for OSPFv3 ExampleRoute Redistribution for OSPFv3 Example RC-191RC-192 MIBs RC-193RC-194 Implementing and Monitoring RIB on Cisco IOS XR Software RC-195Information About RIB Configuration Overview of RIBRIB Data Structures in BGP and Other Protocols RC-196RIB Administrative Distance Protocol Administrative Distance DefaultRIB Support for IPv4 and IPv6 RC-197How to Deploy and Monitor RIB Verifying RIB Configuration Using the Routing TableVerifying Networking and Routing Problems RC-198RC-199 Output of show route Command Example Configuration Examples for RIB MonitoringRC-200 Output of show route backup Command Example Output of show route best-local Command ExampleOutput of show route connected Command Example Output of show route local Command ExampleOutput of show route next-hop Command Example Output of show route longer-prefixes Command ExampleRC-202 Cisco IOS XR Multicast Command Reference, Release RC-203RC-204 Implementing Routing Policy on Cisco IOS XR Software RC-205Prerequisites for Implementing Routing Policy Information About Implementing Routing PolicyRouting Policy Language Routing Policy Language OverviewRouting Policy Language Structure NamesSets RC-207As-path-set Named Set FormInline Set Form RC-208Community-set Extcommunity-setNamed Form RC-209Inline Form Prefix-setRC-210 Routing Policy Language Components Routing Policy Language UsagePass policy RC-211Ignore routes with specific AS numbers in the path Set community based on MEDSet local preference based on community RC-212Routing Policy Configuration Basics Policy DefinitionsPersistent Remarks RC-213Parameterization RC-214Boolean Operator Precedence Semantics of Policy ApplicationRC-215 Multiple Modifications of the Same Attribute When Attributes Are ModifiedRC-216 Control Flow Default Drop DispositionRC-217 Policy Verification Range CheckingIncomplete Policy and Set References RC-218Policy Statements RemarkAttached Policy Modification Verification of Attribute Comparisons and ActionsDisposition RC-220Action RC-221Boolean Conditions RC-222Apply Attach PointsRC-223 Aggregation BGP Policy Attach PointsRC-224 Dampening Default OriginateRC-225 Neighbor Import Neighbor ExportRC-226 Redistribute NetworkRC-227 Show bgp RC-228BGP Attributes and Operators Table PolicyRC-229 Attribute Match Set RC-230Ospf Policy Attach Points Import Export Aggregation Redistribution Prepend as-pathSet med igp-cost SuppressOspf Attributes and Operators OSPFv3 Policy Attach PointsRC-232 OSPFv3 Attributes and Operators RC-233IS-IS Attributes and Operators IS-IS Policy Attach PointsRC-234 Editing Routing Policy Configuration Elements Attached Policy ModificationNonattached Policy Modification RC-235Editing Routing Policy Configuration Elements Using the CLI RC-236Defining a Route Policy How to Implement Routing PolicyRC-237 Attaching a Routing Policy to a BGP Neighbor RC-238Enters address family configuration mode RC-239Modifying a Routing Policy Using the Microemacs Editor RC-240Routing Policy Definition Example RC-241Simple Inbound Policy Example RC-242Modular Inbound Policy Example RC-243Routing Policy Language Commands on Cisco IOS XR Software RC-244RC-245 RC-246 Software RC-247Static Route Functional Overview Default Administrative DistanceRC-248 Recursive Static Routes Directly Connected RoutesRC-249 Configuring a Static Route Fully Specified Static RoutesFloating Static Routes RC-250Configuring a Floating Static Route RC-251RC-252 Changing the Maximum Number of Allowable Static Routes RC-253RC-254 Configuration Examples Configuring Traffic Discard ExampleConfiguring a Fixed Default Route Example Configuring a Floating Static Route ExampleRC-256 D E RC-257RC-258 RC-259 RC-260 IS-IS RC-90 RC-261MD5 RC-262RFC 2328, Ospf Version RC-263RC-264 RC-265 RC-266
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IOS XR specifications

Cisco Systems IOS XR is an advanced operating system designed specifically for high-performance routers and service provider networks. It serves as the backbone for many of Cisco's high-end routing platforms, enabling service providers to manage their networks with increased efficiency, flexibility, and scalability.

One of the main features of IOS XR is its modular architecture. This allows for the independent operation of various components within the OS, facilitating the deployment of new features and updates without affecting the overall stability of the system. This modularity ensures that service providers can implement rapid changes and enhancements while maintaining service continuity.

Another characteristic of IOS XR is its support for 64-bit architecture, which provides enhanced performance and the ability to manage larger amounts of data. This is particularly beneficial for service providers that deal with high traffic volumes and require robust data processing capabilities. The utilization of 64-bit technology also enables the operating system to utilize memory more efficiently, allowing for greater scalability.

IOS XR incorporates advanced technologies such as Distributed System Architecture (DSA) and Multiple Routing Instances (Merging Routes). DSA allows for the distribution of routing processes across multiple hardware resources, maximizing performance and redundancy. Multiple Routing Instances enable operators to create separate logical routing tables for different services, improving isolation and efficiency in managing network traffic.

The operating system also focuses heavily on security, featuring extensive encryption methods and access controls to safeguard network resources. IOS XR supports various authentication protocols, ensuring secure access to routers and switches. In addition, the OS includes comprehensive logging and monitoring capabilities, allowing network administrators to track activities and respond quickly to potential threats.

Another critical aspect of IOS XR is its adherence to the principles of service-oriented architecture (SOA). This approach permits the development of applications and services that can operate independently, fostering innovation and enabling service providers to tailor their offerings based on customer demands.

Ultimately, Cisco IOS XR is a powerful, reliable operating system that meets the complex needs of modern telecommunications networks. With its focus on modularity, performance, security, and scalability, it enables service providers to deliver high-quality, resilient services to their customers while efficiently managing network resources. As the industry continues to evolve, IOS XR remains a vital tool for those aiming to stay competitive in the ever-changing landscape of networking.