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Home Network Prefix Assignment & Configuration Distribution Strategies

This research explores methods for assigning stable prefixes and distributing configuration data in complex home networks. Examining various solutions such as Multilink Subnet Routing, Hierarchical DHCP Prefix Delegation, and Flat DHCP Prefix Delegation, it assesses their efficacy and implications. The study delves into the challenges posed by multiple sources of information and highlights considerations like Flooding versus Request/Reply mechanisms, NAT, and the need for server discovery. The evaluation of these strategies considers aspects like network visibility, collision detection, and fate sharing assumptions.

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Home Network Prefix Assignment & Configuration Distribution Strategies

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  1. Prefix Assignment and distribution of other configuration infromation Ole Trøan@Homenet IETF82

  2. Problem: • How to assign stable prefixes to links in an arbitrary topology home network? • How to distribute other configuration information (DNS servers etc)? • Given multiple sources of information

  3. Possible Solutions (interim): • Layer 2/RFC6204 topology – null solution • Multilink subnet routing • Hosts routes combined with ND flooding (draft-ietf-ipv6-multilink-subnets-00) • Hierarchical DHCP Prefix DelegationRFC3633 + draft-chakrabarti-homenet-prefix-alloc-00 • Flat DHCP Prefix Delegation RFC3633 + draft-baker-homenet-prefix-assignment-00 • Zeroconf OSPF draft-arkko-homenet-prefix-assignment-01 • NAT (IPv6 NAT or NPT66) • Others

  4. Consider: Flooding vs Request/Reply • Request/Reply may require a God server • Make handling multiple sources of information difficult • Request/Reply requires some way of discovery of the “server”. • Flooding is distributed state. All routers in the network has the same view of the network. Assuming link-state routing here. • Requires “collision detection” • Both assumes fate sharing that the node injecting site-prefix or being the server are co-located with the border router

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