DHCPv6 Prefix Delegation Using AAA

This feature enables the Dynamic Host Configuration Protocol for IPv6 (DHCPv6) server to use AAA to obtain the prefix assignment through an AAA/RADIUS authorization request.

Finding Feature Information

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Information About DHCPv6 Prefix Delegation Using AAA

Prefix Delegation

An IPv6 prefix delegating device selects IPv6 prefixes to be assigned to a requesting device upon receiving a request from the client. The delegating device might select prefixes for a requesting device in the following ways:

  • Dynamic assignment from a pool of available prefixes.

  • Dynamic assignment from a pool name obtained from the RADIUS server.

  • Assignment of prefix obtained from the RADIUS sever.

Contrary to IPv4 address assignment, an IPv6 user will be assigned a prefix, not a single address. Typically the Internet service provider (ISP) assigns a 64- or 48-bit prefix.

DHCP SIP Server Options

Two DHCP for IPv6 Session Initiation Protocol (SIP) server options describe a local outbound SIP proxy: one carries a list of domain names, the other a list of IPv6 addresses. These two options can be configured in a DHCPv6 configuration pool.

How to Configure DHCPv6 Prefix Delegation Using AAA

Configuring DHCPv6 AAA and SIP Options

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    ipv6 dhcp pool poolname

    4.    prefix-delegation aaa [method-list method-list] [lifetime]

    5.    sip address ipv6-address

    6.    sip domain-name domain-name


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Router> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.

     
    Step 2 configure terminal


    Example:
    Router# configure terminal
     

    Enters global configuration mode.

     
    Step 3 ipv6 dhcp pool poolname


    Example:
    Router(config)# ipv6 dhcp pool pool1
     

    Configures a DHCP for IPv6 configuration information pool and enters DHCP for IPv6 pool configuration mode.

     
    Step 4 prefix-delegation aaa [method-list method-list] [lifetime]


    Example:
    Router(config-dhcp)# prefix-delegation aaa method-list list1
     

    Specifies that prefixes are to be acquired from AAA servers.

     
    Step 5 sip address ipv6-address


    Example:
    Router(config-dhcp)# sip address 2001:DB8::2
     

    Configures a SIP server IPv6 address to be returned in the SIP server’s IPv6 address list option to clients.

     
    Step 6 sip domain-name domain-name


    Example:
    Router(config-dhcp)# sip domain sip1.cisco.com
     

    Configures a SIP server domain name to be returned in the SIP server’s domain name list option to clients.

     

    Configuration Examples for DHCPv6 Prefix Delegation Using AAA

    Example: Configuring DHCPv6 AAA and SIP Options

    Device# show ipv6 dhcp pool
DHCPv6 pool: dhcpv6-aaa-pool
Prefix from AAA server
method list name: dhcpv6_aaa
preferred lifetime 180, valid lifetime 240
SIP server address: 2000:DB8:1
SIP server domain name: testing-1
Active clients: 0

    Additional References

    Related Documents

    Related Topic

    Document Title

    IPv6 addressing and connectivity

    IPv6 Configuration Guide

    Cisco IOS commands

    Cisco IOS Master Command List, All Releases

    IPv6 commands

    Cisco IOS IPv6 Command Reference

    Cisco IOS IPv6 features

    Cisco IOS IPv6 Feature Mapping

    Standards and RFCs

    Standard/RFC

    Title

    RFCs for IPv6

    IPv6 RFCs

    MIBs

    MIB

    MIBs Link

    To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

    http:/​/​www.cisco.com/​go/​mibs

    Technical Assistance

    Description

    Link

    The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

    http:/​/​www.cisco.com/​cisco/​web/​support/​index.html

    Feature Information for DHCPv6 Prefix Delegation Using AAA

    The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

    Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to . An account on Cisco.com is not required.
    Table 1 Feature Information for DHCPv6 Prefix Delegation Using AAA

    Feature Name

    Releases

    Feature Information

    DHCPv6 Prefix Delegation Using AAA

    12.3(4)T

    The DHCPv6 server can use AAA to obtain the prefix assignment through an AAA/RADIUS authorization request.

    The following commands were introduced or modified: ipv6 dhcp pool, prefix-delegation aaa, sip address, sip domain-name.