A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IS-IS for IP Internets Working Group of the IETF.
Title : IS-IS Automatic Encapsulation
Author(s) : P. Christian
Filename : draft-ietf-isis-auto-encap-03.txt
Pages : 24
Date : 2003-3-31
RFC 1195 [1] documents a dual routing protocol that can be used to
route both CLNP and IPv4, that is Integrated IS-IS. Integrated IS-
IS can now also be used to route IPv6 [12].
RFC 1195 [1] places certain topological restrictions on networks
that are routed using Integrated IS-IS, specifically that every
Intermediate System in a level-1 area must be able to forward all
network layer protocols that are present in that area, and that
every level-2 Intermediate System must be able to forward all
network layer protocols present in the routing domain.
The mechanism described in this document enables an Intermediate
System or a group of Intermediate Systems that do not support a
particular network layer protocol to be used in a level-1 area or
level-2 subdomain where that network layer protocol is present.
Specifically the mechanism provides automatic encapsulation and
unencapsulation so that a packet or PDU may pass through an
Intermediate System that would not normally be able to forward that
type of packet.
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