ID ACTION:draft-ietf-ospf-extattr-00.txt

Internet-Drafts@CNRI.Reston.VA.US Wed, 24 March 1993 16:27 UTC

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Subject: ID ACTION:draft-ietf-ospf-extattr-00.txt
Date: Wed, 24 Mar 1993 10:43:40 -0500
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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 Open Shortest Path First
IGP Working Group of the IETF.                                        

       Title     : The OSPF External Attributes LSA                   
       Author(s) : D. Ferguson
       Filename  : draft-ietf-ospf-extattr-00.txt
       Pages     : 18

This document describes an optional extension to version 2 of the OSPF
routing protocol [RFC1247] to support the transport of External 
Attributes associated with external routes which AS border routers 
have originated into OSPF between and among border routers using 
OSPF's reliable flooding mechanism.  External Attributes are data 
associated with routes received and readvertised via some exterior 
gateway protocols, data which has meaning to, and must be distributed 
among, border routers running those protocols to allow external routes
to be evaluated and readvertised by such routers, but which has no 
direct influence on routes computed by OSPF.                          

The technique described uses a new, distinct OSPF link state 
advertisement (LSA) format (Type 8) to propagate external attribute 
information in a form which is opaque to the OSPF protocol itself but 
which is meaningful for border routers running appropriate exterior 
gateway protocols.                                                    

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