I-D ACTION:draft-ietf-rolc-apr-00.txt

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A New Internet-Draft is available from the on-line Internet-Drafts 
directories. This draft is a work item of the Routing over Large Clouds 
Working Group of the IETF.                                                 

       Title     : Address Prefix Region and its application to 
                   Switched Data Link Subnetworks                                   
       Author(s) : Y. Rekhter, D. Kandlur
       Filename  : draft-ietf-rolc-apr-00.txt
       Pages     : 9
       Date      : 09/22/1995

The original IP architecture assumes that each Data Link subnetwork is 
labeled with a single IP network number. A pair of hosts with the same 
network number communicate directly  (with no routers); a pair of hosts 
with different network numbers always communicate through one or more 
routers. As indicated in RFC1620, these assumptions may be violated for 
large data networks, and specifically for networks based on switched 
virtual circuit (SVC) based technologies (e.g. ATM, X.25).  The 
architecture works even when this assumption is violated, but it imposes 
constraints on communication among hosts and routers through a network, 
which in turn may preclude full utilization of the capabilities provided by
the underlying SVC-based Data Link subnetwork.  This document describes 
extensions to the IP architecture that relaxes these constraints, thus 
enabling the full utilization of the services provided by SVC-based Data 
Link subnetworks. The document also specifies how the proposed extensions 
could be used for other types of subnetworks.                              

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