Local IPv6 Networking March 2000 Adelaide IETF Bob Hinden / Nokia

Local IPv6 NetworkingAdelaide IETF 2 / 29 March 2000 / R. Hinden Introduction IPv6 –Autoconfiguration works great with Routers Supports Address related functions Does not support Names or Services –Address Scoping and Address Selection IPv6 missing mechanisms to discover nodes and services without configuration or server Need Local Mechanisms that work –Disconnected from Internet, and/or –Connected to Internet Simple, Reliable, Automatic

Local IPv6 NetworkingAdelaide IETF 3 / 29 March 2000 / R. Hinden Disconnected Service Services Discoverable and Reachable without Router or Server No configuration required Used when site is disconnected and connected –Smooth transition –Some services are only local

Local IPv6 NetworkingAdelaide IETF 4 / 29 March 2000 / R. Hinden Disconnected Mechanisms I am "name” Advertisement –Simple default names for service nodes HP XYZ.1 Printer, Sony XYZ Projector, etc. –User can also configure local names –Send when booting up and periodically (~1 min). Pick time that is less that node boot time but not too often –Send to All Nodes Multicast Address Site-Scope Who is "name” –Owner responds w/ "I am name” message

Local IPv6 NetworkingAdelaide IETF 5 / 29 March 2000 / R. Hinden Mechanisms (continued) Simple "chooser" type of application that shows user what names are available –Filter on some set of types Printers, file server, etc. –Investigate using existing assignment of standard service types From service location protocol?

Local IPv6 NetworkingAdelaide IETF 6 / 29 March 2000 / R. Hinden Connected Service New Router Advertisement option (DNS server option) w/ –Address of DNS server(s) –Default top level domain for link –Ordered list of domains to query for unqualified names RA Option for scope value to send “I am “name” ” advertisements –Allows site to control range of disconnected mechanisms

Local IPv6 NetworkingAdelaide IETF 7 / 29 March 2000 / R. Hinden How to Resolve Local / Global Names Define new top level virtual domain –.local (or.private,.invisible, etc.) Use “DNS server” router advertisement to advertise ".local” as first domain to query To resolve fully qualified domain names –foo.local uses disconnected mechanisms –foo.* goes to DNS server To resolve unqualified Domain Names –First try disconnected mechanisms –Then try default global domain and other domains to search –Hidden from application by building into host resolver

Local IPv6 NetworkingAdelaide IETF 8 / 29 March 2000 / R. Hinden Issues What default scope for advertisements? –Link-Scope, Link < Scope < Site, Site-Scope? DNS Advertisement –Part of ND Router Advertisement, or –Advertisement sent by DNS server Security issues? Relationship to Service Location Protocol?