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IPv4 to IPv6 network migration by Rodney
Smith For CS158 4-11-2005
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Overview

• Requirements for transition to an IPv6 network.
• Steps towards migration to an IPv6 network.

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Requirements for transition to an IPv6 network

• The IPv6 network should perform just as well as
  the IPv4 network. (ex. Enough memory)
• Network Management tools for IPv6 network. (ex.
  Cisco Works)
• No disruption in service. (ex. Enough CPU)
• Address allocation.

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Steps Towards IPv6 migration
IPv6 Address allocation

• Obtain IPv6 address space allocation.
• Can obtain via Regional Internet Registry. (ex.
  Ripe NCC)
• The more addresses obtained the better but should
  not be a problem with IPv6

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Steps Towards IPv6 Migration
Plan how addresses will be assigned between
network sites.

• In IPv4 we would use variable length subnet masks
  to provide a hierarchical way of assigning
  addresses
• In IPv6 we are not restricted as much and can
  assign one sized mask to all sites.

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Steps Towards IPv6 Migration
Network Management tools

• Must be able to provide a way to monitor IPv6
  enabled network with IPv6 enabled mangement
  tools.
• Example of one such tool is Cisco Works

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Steps Towards IPv6 Migration

• Simple IPv4 Network for Medium to Large networks

Transition Path for IPv4 Network
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Steps Towards IPv6 Migration
Transition Path for IPv4 Network

• Dual-Stack
• 6to4 tunnel
• Tunnel Broker
• Layer 2 VPN

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Steps Towards IPv6 Migration
Transition Path for IPv4 Network

• 6PE
• Future protocol 6VPE

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Steps Towards IPv6 Migration
Routing Protocol

• OSPFv3
• ISIS for IPv6
• BGP-4
• RIPng (dont use this!)

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Steps Towards IPv6 Migration
Enable Endpoints of network

• WinXP Win2k are IPv6 compatible. Enable all
  endpoints of single site after upgrade of
  routers.
• Make sure you plan and test how this upgrade
  would occur.

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Questions and Comments?