DHCPv6 Prefix Delegation Using AAA

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

• Finding Feature Information, page 1

• Information About DHCPv6 Prefix Delegation Using AAA, page 1

• How to Configure DHCPv6 Prefix Delegation Using AAA, page 2

• Configuration Examples for DHCPv6 Prefix Delegation Using AAA, page 3

• Additional References, page 3

• Feature Information for DHCPv6 Prefix Delegation Using AAA, page 4

Finding Feature InformationYour software release may not support all the features documented in this module. For the latest caveats andfeature information, see Bug Search Tool and the release notes for your platform and software release. Tofind information about the features documented in this module, and to see a list of the releases in which eachfeature is supported, see the feature information table.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support.To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Information About DHCPv6 Prefix Delegation Using AAA

Prefix DelegationAn IPv6 prefix delegating device selects IPv6 prefixes to be assigned to a requesting device upon receivinga request from the client. The delegating device might select prefixes for a requesting device in the followingways:

• Dynamic assignment from a pool of available prefixes.

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

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• 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. Typicallythe Internet service provider (ISP) assigns a 64- or 48-bit prefix.

DHCP SIP Server OptionsTwo 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 ina DHCPv6 configuration pool.

How to Configure DHCPv6 Prefix Delegation Using AAA

Configuring DHCPv6 AAA and SIP Options

SUMMARY STEPS

1. enable2. configure terminal3. ipv6 dhcp pool poolname4. prefix-delegation aaa [method-list method-list] [lifetime]5. sip address ipv6-address6. sip domain-name domain-name

DETAILED STEPS

PurposeCommand or Action

Enables privileged EXEC mode.enableStep 1

Example:

Router> enable

• Enter your password if prompted.

Enters global configuration mode.configure terminal

Example:

Router# configure terminal

Step 2

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

ipv6 dhcp pool poolname

Example:

Router(config)# ipv6 dhcp pool pool1

Step 3

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DHCPv6 Prefix Delegation Using AAAHow to Configure DHCPv6 Prefix Delegation Using AAA

PurposeCommand or Action

Specifies that prefixes are to be acquired fromAAA servers.prefix-delegation aaa [method-list method-list][lifetime]

Step 4

Example:

Router(config-dhcp)# prefix-delegation aaamethod-list list1

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

sip address ipv6-address

Example:

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

Step 5

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

sip domain-name domain-name

Example:

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

Step 6

Configuration Examples for DHCPv6 Prefix Delegation UsingAAA

Example: Configuring DHCPv6 AAA and SIP OptionsDevice# show ipv6 dhcp poolDHCPv6 pool: dhcpv6-aaa-poolPrefix from AAA servermethod list name: dhcpv6_aaapreferred lifetime 180, valid lifetime 240SIP server address: 2000:DB8:1SIP server domain name: testing-1Active clients: 0

Additional ReferencesRelated Documents

Document TitleRelated Topic

IPv6 Configuration GuideIPv6 addressing and connectivity

Cisco IOS Master Command List,All Releases

Cisco IOS commands

IP Addressing: DHCP Configuration Guide, Cisco IOS Release 15M&T 3

DHCPv6 Prefix Delegation Using AAAConfiguration Examples for DHCPv6 Prefix Delegation Using AAA

Document TitleRelated Topic

Cisco IOS IPv6 CommandReference

IPv6 commands

Cisco IOS IPv6 Feature MappingCisco IOS IPv6 features

Standards and RFCs

TitleStandard/RFC

IPv6 RFCsRFCs for IPv6

MIBs

MIBs LinkMIB

To locate and downloadMIBs for selected platforms,Cisco IOS releases, and feature sets, use Cisco MIBLocator found at the following URL:

http://www.cisco.com/go/mibs

Technical Assistance

LinkDescription

http://www.cisco.com/cisco/web/support/index.htmlThe Cisco Support and Documentation websiteprovides online resources to download documentation,software, and tools. Use these resources to install andconfigure the software and to troubleshoot and resolvetechnical issues with Cisco products and technologies.Access to most tools on the Cisco Support andDocumentation website requires a Cisco.com user IDand password.

Feature Information for DHCPv6 Prefix Delegation Using AAAThe following table provides release information about the feature or features described in this module. Thistable lists only the software release that introduced support for a given feature in a given software releasetrain. 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.

IP Addressing: DHCP Configuration Guide, Cisco IOS Release 15M&T4

DHCPv6 Prefix Delegation Using AAAFeature Information for DHCPv6 Prefix Delegation Using AAA

Table 1: Feature Information for DHCPv6 Prefix Delegation Using AAA

Feature InformationReleasesFeature Name

The DHCPv6 server can use AAAto obtain the prefix assignmentthrough an AAA/RADIUSauthorization request.

The following commands wereintroduced or modified: ipv6 dhcppool, prefix-delegation aaa, sipaddress, sip domain-name.

12.3(4)TDHCPv6 Prefix Delegation UsingAAA

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DHCPv6 Prefix Delegation Using AAAFeature Information for DHCPv6 Prefix Delegation Using AAA

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DHCPv6 Prefix Delegation Using AAAFeature Information for DHCPv6 Prefix Delegation Using AAA