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Ipv6-15-2Mt-Book.Pdf IPv6 Configuration Guide, Cisco IOS Release 15.2MT Americas 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: 408 527-0883 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 INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY. The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California. NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS” WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R) Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental. © 2012 Cisco Systems, Inc. All rights reserved. C O N T E N T S Start Here: Cisco IOS Software Release Specifics for IPv6 Features 1 Finding Feature Information 1 Cisco IOS Software Platform Dependencies and Restrictions 1 Cisco IOS IPv6 Features and Supported Software Releases 2 Cisco Platforms Supporting IPv6 Hardware Forwarding 27 Supported Platforms 27 Additional 12.2S Release Trains 29 Additional References 30 Implementing IPv6 Addressing and Basic Connectivity 39 Finding Feature Information 39 Prerequisites for Implementing IPv6 Addressing and Basic Connectivity 39 Restrictions for Implementing IPv6 Addressing and Basic Connectivity 40 Information About Implementing IPv6 Addressing and Basic Connectivity 40 IPv6 for Cisco Software 41 Large IPv6 Address Space for Unique Addresses 41 IPv6 Address Formats 42 IPv6 Address Type: Unicast 43 Aggregatable Global Address 43 Link-Local Address 44 IPv4-Compatible IPv6 Address 45 Unique Local Address 45 Site-Local Address 46 IPv6 Address Type: Anycast 46 IPv6 Address Type Multicast 46 IPv6 Multicast Groups 48 IPv6 Address Output Display 48 Simplified IPv6 Packet Header 49 Cisco Express Forwarding and Distributed Cisco Express Forwarding Switching for IPv6 52 Unicast Reverse Path Forwarding 53 IPv6 Configuration Guide, Cisco IOS Release 15.2MT iii Contents DNS for IPv6 54 Path MTU Discovery for IPv6 54 Cisco Discovery Protocol IPv6 Address Support 55 ICMP for IPv6 55 IPv6 ICMP Rate Limiting 55 IPv6 Neighbor Discovery 56 Stateful Switchover 56 IPv6 Neighbor Solicitation Message 56 Enhanced IPv6 Neighbor Discovery Cache Management 58 IPv6 Router Advertisement Message 59 Default Router Preferences for Traffic Engineering 60 IPv6 Neighbor Redirect Message 60 Per-Interface Neighbor Discovery Cache Limit 62 Link, Subnet, and Site Addressing Changes 62 IPv6 Stateless Autoconfiguration 62 Simplified Network Renumbering for IPv6 Hosts 62 IPv6 General Prefixes 63 DHCP for IPv6 Prefix Delegation 63 IPv6 Prefix Aggregation 64 IPv6 Site Multihoming 64 IPv6 Data Links 64 IPv6 for Cisco Software Support for Wide-Area Networking Technologies 65 IPv6 Addresses and PVCs 65 Routed Bridge Encapsulation for IPv6 65 IPv6 Redirect Messages 65 IPv6 on BVI Interfaces for Bridging and Routing 66 Dual IPv4 and IPv6 Protocol Stacks 66 How to Implement IPv6 Addressing and Basic Connectivity 67 Configuring IPv6 Addressing and Enabling IPv6 Routing 68 Configuring a Neighbor Discovery Cache Limit 69 Configuring a Neighbor Discovery Cache Limit on a Specified Router Interface 70 Configuring a Neighbor Discovery Cache Limit on All Device Interfaces 70 Customizing the Parameters for IPv6 Neighbor Discovery 71 Defining and Using IPv6 General Prefixes 72 Defining a General Prefix Manually 73 IPv6 Configuration Guide, Cisco IOS Release 15.2MT iv Contents Defining a General Prefix Based on a 6to4 Interface 73 Defining a General Prefix with the DHCP for IPv6 Prefix Delegation Client Function 74 Using a General Prefix in IPv6 74 Configuring an Interface to Support the IPv4 and IPv6 Protocol Stacks 75 Customizing IPv6 ICMP Rate Limiting 76 Configuring the DRP Extension for Traffic Engineering 77 Configuring Cisco Express Forwarding and Distributed Cisco Express Forwarding Switching for IPv6 78 Configuring Cisco Express Forwarding Switching on Distributed and Nondistributed Architecture Platforms 78 Configuring Unicast RPF 81 Mapping Hostnames to IPv6 Addresses 83 Mapping IPv6 Addresses to IPv6 ATM and Frame Relay Interfaces 84 Displaying IPv6 Redirect Messages 87 Examples 89 Configuration Examples for Implementing IPv6 Addressing and Basic Connectivity 92 Example: IPv6 Addressing and IPv6 Routing Configuration 92 Example: Customizing the Parameters for IPv6 Neighbor Discovery 93 Example: Dual-Protocol Stack Configuration 93 Example: IPv6 ICMP Rate Limiting Configuration 94 Example: Cisco Express Forwarding and Distributed Cisco Express Forwarding Configuration 94 Example: Hostname-to-Address Mappings Configuration 94 Examples: IPv6 Address to ATM and Frame Relay PVC Mapping Configuration 95 Example: IPv6 ATM PVC Mapping Configuration (Point-to-Point Interface) 95 Example: IPv6 ATM PVC Mapping Configuration (Point-to-Multipoint Interface) 95 Example: IPv6 Frame Relay PVC Mapping Configuration (Point-to-Point Interface) 96 Example: IPv6 Frame Relay PVC Mapping Configuration (Point-to-Multipoint Interface) 97 Additional References 97 Feature Information for Implementing IPv6 Addressing and Basic Connectivity 100 Implementing ADSL and Deploying Dial Access for IPv6 111 Finding Feature Information 111 Restrictions for Implementing ADSL and Deploying Dial Access for IPv6 111 Information About Implementing ADSL and Deploying Dial Access for IPv6 111 Address Assignment for IPv6 112 Stateless Address Autoconfiguration 112 IPv6 Configuration Guide, Cisco IOS Release 15.2MT v Contents Prefix Delegation 112 DHCP SIP Server Options 113 AAA over IPv6 113 RADIUS over IPv6 113 RADIUS Per-User Attributes for Virtual Access in IPv6 Environments 113 TACACS+ Over an IPv6 Transport 115 IPv6 Prefix Pools 115 How to Configure ADSL and Deploy Dial Access in IPv6 115 Configuring the NAS 115 Configuring the Remote CE Router 119 Configuring the DHCPv6 Server to Obtain Prefixes from RADIUS Servers 121 Configuring DHCPv6 AAA and SIP Options 122 Configuring TACACS+ over IPv6 123 Configuring the TACACS+ Server over IPv6 124 Specifying the Source Address in TACACS+ Packets 125 Configuring TACACS+ Server Group Options 126 Configuration Examples for Implementing ADSL and Deploying Dial Access for IPv6 127 Example Implementing ADSL and Deploying Dial Access for IPv6 127 Additional References 128 Feature Information for Implementing ADSL and Deploying Dial Access for IPv6 130 Implementing Bidirectional Forwarding Detection for IPv6 133 Finding Feature Information 133 Prerequisites for Implementing Bidirectional Forwarding Detection for IPv6 133 Restrictions for Implementing Bidirectional Forwarding Detection for IPv6 134 Information About Implementing Bidirectional Forwarding Detection for IPv6 134 Overview of the BFDv6 Protocol 134 BFDv6 Registration 134 BFDv6 Global and Link-Local Addresses 134 BFD for IPv4 and IPv6 on the Same Interface 135 Static Route Support for BFD over IPv6 135 BFDv6 Associated Mode 135 BFDv6 Unassociated Mode 136 BFD Support for OSPFv3 136 How to Configure Bidirectional Forwarding Detection for IPv6 136 Specifying a Static BFDv6 Neighbor 136 IPv6 Configuration Guide, Cisco IOS Release 15.2MT vi Contents Associating an IPv6 Static Route with a BFDv6 Neighbor 137 Configuring BFD Support for OSPFv3 138 Configuring Baseline BFD Session Parameters on the Interface 139 Configuring BFD Support for OSPFv3 for All Interfaces 140 Configuring BFDv6 Support for OSPFv3 on One or More OSPFv3 Interfaces 141 Retrieving BFDv6 Information for Monitoring and Troubleshooting 143 Configuration Examples for Bidirectional Forwarding
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