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Cisco IOS XR Routing Configuration Guide
Cisco IOS XR Software Release 3.2
Corporate Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: 408 526-4000
800 553-NETS (6387)
Fax: 408 526-4100
Text Part Number: OL-5554-05
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THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE IN
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CONTENTS Preface xi Document Revision History xi Obtaining Documentation xii Cisco.com xii Product Documentation DVD xii Ordering Documentation xii Documentation Feedback xiii Cisco Product Security Overview xiii Reporting Security Problems in Cisco Products xiii Obtaining Technical Assistance xiv Cisco Technical Support & Documentation Website xiv Submitting a Service Request xv Definitions of Service Request Severity xv Obtaining Additional Publications and Information xv Implementing BGP on C
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Contents How to Implement BGP on Cisco IOS XR Software RC-27 Enabling BGP Routing RC-28 Configuring a Routing Domain Confederation for BGP RC-31 Resetting eBGP Session Immediately Upon Link Failure RC-33 Logging Neighbor Changes RC-34 Adjusting BGP Timers RC-34 Changing the BGP Default Local Preference Value RC-35 Configuring the MED Metric for BGP RC-36 Configuring BGP Weights RC-38 Tuning the BGP Best Path Calculation RC-39 Indicating BGP Backdoor Routes RC-41 Configuring Aggregate Addresses R
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Contents Related Documents RC-80 Standards RC-80 MIBs RC-80 RFCs RC-80 Technical Assistance RC-81 Implementing IS-IS on Cisco IOS XR Software RC-83 Contents RC-83 Prerequisites for Implementing IS-IS on Cisco IOS XR Software RC-84 Restrictions for Implementing IS-IS on Cisco IOS XR Software RC-84 Information About Implementing IS-IS on Cisco IOS XR Software RC-84 IS-IS Functional Overview RC-85 Key Features Supported in the Cisco IOS XR IS-IS Implementation RC-85 IS-IS Configuration Grouping RC-
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Contents Customizing Routes for IS-IS RC-119 Configuration Examples for Implementing IS-IS on Cisco IOS XR Software RC-122 Configuring Single-Topology IS-IS for IPv6: Example RC-122 Configuring Multitopology IS-IS for IPv6: Example RC-123 Redistributing IS-IS Routes Between Multiple Instances: Example RC-123 Where to Go Next RC-124 Additional References RC-124 Related Documents RC-124 Standards RC-124 MIBs RC-124 RFCs RC-125 Technical Assistance RC-125 Implementing OSPF on Cisco IOS XR Software
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Contents Enabling OSPF RC-145 Configuring Stub and Not-so-Stubby Area Types RC-147 Configuring Neighbors for Nonbroadcast Networks RC-150 Configuring Authentication at Different Hierarchical Levels for OSPF Version 2 RC-155 Controlling the Frequency that the Same LSA Is Originated or Accepted for OSPF RC-158 Creating a Virtual Link with MD5 Authentication to Area 0 for OSPF RC-160 Summarizing Subnetwork LSAs on an OSPF ABR RC-164 Redistributing Routes from One IGP into OSPF RC-166 Configuring OS
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Contents RIB Support for IPv4 and IPv6 RC-197 How to Deploy and Monitor RIB RC-198 Verifying RIB Configuration Using the Routing Table RC-198 Verifying Networking and Routing Problems RC-198 Configuration Examples for RIB Monitoring RC-200 Output of show route Command: Example RC-200 Output of show route backup Command: Example RC-201 Output of show route best-local Command: Example RC-201 Output of show route connected Command: Example RC-201 Output of show route local Command: Example RC-201 O
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Contents Simple Inbound Policy: Example RC-242 Modular Inbound Policy: Example RC-243 Translating Cisco IOS Route Maps to Cisco IOS XR Routing Policy Language: Example RC-244 Additional References RC-244 Related Documents RC-244 Standards RC-244 MIBs RC-245 RFCs RC-245 Technical Assistance RC-245 Implementing Static Routes on Cisco IOS XR Software RC-247 Contents RC-247 Prerequisites for Implementing Static Routes on Cisco IOS XR Software RC-248 Information About Implementing Static Routes on Ci
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Contents Cisco IOS XR Routing Configuration Guide RC-x
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Preface This is the preface for the Cisco IOS XR Routing Configuration Guide. The preface contains the following sections: • Document Revision History, page xi Obtaining Documentation, page xii Documentation Feedback, page xiii Cisco Product Security Overview, page xiii Obtaining Technical Assistance, page xiv Obtaining Additional Publications and Information, page xv Document Revision History The Document Revision History table records technical changes to this document. Table 1 show
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Preface Obtaining Documentation Obtaining Documentation Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems. Cisco.com You can access the most current Cisco documentation at this URL: http://www.cisco.com/techsupport You can access the Cisco website at this URL: http://www.cisco.com You can access inte
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Preface Documentation Feedback Documentation Feedback You can rate and provide feedback about Cisco technical documents by completing the online feedback form that appears with the technical documents on Cisco.com. You can send comments about Cisco documentation to bug-doc@cisco.com. You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address: Cisco Systems Attn: Customer Document Ordering 170 West Tasman Drive
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Preface Obtaining Technical Assistance Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product to encrypt any sensitive information that you send to Cisco. PSIRT can work from encrypted information that is compatible with PGP versions 2.x through 8.x. Never use a revoked or an expired encryption key. The correct public key to use in your correspondence with PSIRT is the one linked in the Contact Summary section of the Security Vulnerability Policy page at this URL: htt
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Preface Obtaining Additional Publications and Information Submitting a Service Request Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool provides recommended solutions. If your issue is not resolved using the recommended resources, your service request is
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Preface Obtaining Additional Publications and Information Cisco Press publishes a wide range of general networking, training and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press at this URL: http://www.ciscopress.com Packet magazine is the Cisco Systems technical user magazine for maximizing Internet and networking investments. Each quarter, Packet delivers coverage of the lat
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Implementing BGP on Cisco IOS XR Software The Border Gateway Protocol (BGP) is an Exterior Gateway Protocol (EGP) that allows you to create loop-free interdomain routing between autonomous systems. An autonomous system is a set of routers under a single technical administration. Routers in an autonomous system can use multiple Interior Gateway Protocols (IGP) to exchange routing information inside the autonomous system and an EGP to route packets outside the autonomous system. This module d
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Implementing BGP on Cisco IOS XR Software Prerequisites for Implementing BGP on Cisco IOS XR Software Prerequisites for Implementing BGP on Cisco IOS XR Software To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide. Information About Implementing BGP on Cisco
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Implementing BGP on Cisco IOS XR Software Information About Implementing BGP on Cisco IOS XR Software BGP Router Identifier For BGP sessions between neighbors to be established, BGP must be assigned a router ID. The router ID is sent to BGP peers in the OPEN message when a BGP session is established. BGP attempts to obtain a router ID in the following ways (in order of preference): By means of the address configured using the bgp router-id command in router configuration mode. By assigning
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Implementing BGP on Cisco IOS XR Software Information About Implementing BGP on Cisco IOS XR Software – 512K (524,288) prefixes for IPv4 unicast. – 128K (131,072) prefixes for IPv4 multicast. – 128K (131,072) prefixes for IPv6 unicast. A cease notification message is sent to the neighbor and the peering with the neighbor is terminated when the number of prefixes received from the peer for a given address family exceeds the maximum limit (either set by default or configured by the user) for t
