Routing Aspects of IPv6 Transition (RFC2185)
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2000-Sep-13
Internet Society Requests For Comment (RFCs)
R. Callon: AUTHOR [+2]
This document gives an overview of the routing aspects of the IPv6 transition. It is based on the protocols defined in the document "Transition Mechanisms for IPv6 Hosts and Routers" . Readers should be familiar with the transition mechanisms before reading this document.
Network Working Group R. Callon
Request for Comments: 2185 Cascade Communications Co.
Category: Informational D. Haskin
Bay Networks Inc.
Routing Aspects Of IPv6 Transition
Status of this memo
This memo provides information for the Internet community. This memo
does not specify an Internet standard of any kind. Distribution of
this memo is unlimited.
This document gives an overview of the routing aspects of the IPv6
transition. It is based on the protocols defined in the document
"Transition Mechanisms for IPv6 Hosts and Routers" . Readers
should be familiar with the transition mechanisms before reading this
The proposals contained in this document are based on the work of the
Ngtrans working group.
This paper uses the following terminology:
node - a protocol module that implements IPv4 or IPv6.
router - a node that forwards packets not explicitly
addressed to itself.
host - any node that is not a router.
border router - a router that forwards packets across
routing domain boundaries.
link - a communication facility or medium over which
nodes can communicate at the link layer, i.e., the layer
immediately below internet layer.
interface - a node's attachment to a link.
address - an network layer identifier for an interface or
a group of interfaces.
neighbors - nodes attached to the same link.
routing domain - a collection of routers which coordinate
routing knowledge using a single routing protocol.
routing region (or just "region") - a collection of routers
interconnected by a single internet protocol (e.g. IPv6)
and coordinating their routing knowledge using routing
protocols from a single internet protocol stack. A
routing region may be a superset of a routing domain.
tunneling - encapsulation of protocol A within protocol B,
such that A treats B as though it were a datalink layer.
reachability information - information describing the set of
reachable destinations that can be used for packet
routing information - same as reachability information.
address prefix - the high-order bits in an address.
routing prefix - address prefix that expresses destinations
which have addresses with the matching address prefixes.
It is used by routers to advertise what systems they are
capable of reaching.
route leaking - advertisement of network layer reachability
information across routing region boundaries.
2. ISSUES AND OUTLINE
This document gives an ove...