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IPv6 Deployment for ADSL

This document provides a comprehensive overview of deploying IPv6 in ADSL access networks, highlighting key configurations and address allocation strategies. It covers ADSL configuration for IPv6, including recommendations for address allocation, the protocol stack (PPP over ATM), and necessary settings for LNS and BAS configuration. The document further details AAA methods and guidelines for IPv6 address assignment per RFC 3177, focusing on best practices for home/SOHO environments and ensuring effective management of addresses through DHCP and RA.

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IPv6 Deployment for ADSL

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  1. IPv6 Deployment for ADSL Address allocation and Configuration

  2. ADSL Access Networks Overview • AdSL Configuration For IPv6 • Recommended Address Allocation

  3. ADSL Access Networks overview

  4. ADSL Access Networks

  5. Protocol Stack - PPP over ATM

  6. ADSL configuration

  7. LNS and BAS Configuration • LNS configuration ipv6 unicast-routing aaa new-model aaa authentication ppp default group tacacs+ aaa authorization network default group tacacs+ aaa authorization configuration NITC group tacacs+ vpdn-group 1 accept-dialin protocol l2tp virtual-template 1 interface Virtual-Template1 ipv6 enable no ipv6 nd suppress-ra ipv6 dhcp server ADSL-Pool ppp authentication chap callin ipv6 dhcp pool ADSL-Pool prefix-delegation aaa method-list NITC • BAS Unaware of this configuration

  8. Recommended address allocation

  9. Ipv6 Address Allocation Guideline • RFC 3177 recommends the following : A single PC, with no additional need to subnet, dialing-up from a hotel room may receive its /128 IPv6 address for a PPP style connection as part of a /64 prefix. • Give Home/SOHO a permanent /64 – single link • Short-lived /64 from a prefix-pool A Separate /64 is assigned each user/interface. The prefix is advertised in RA’s and a route is installed in the RIB.

  10. Give home users a permanent /64 – single link

  11. short-lived /128

  12. THANK You

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