Hi Acee,

quote From section (5):

   "In this manner, OSPFv3 routers using new encodings can be
   completely isolated from those OSPFv3 routers depending on the RFC
   5340 encoding and not setting their options field EL-bits since the
   default setting indicates no support for extended LSAs."

Even though you prevent adjacency to be formed between routers with certain compatibility modes, it still does not prevent all modes to coexist in the area/network.

Let's imagine you have a chain of routers with following modes:

Full---MixedModeOriginateSPF----MixedModeOriginateOnly-----None


thanks,
Peter

On 4/18/14 17:58 , Acee Lindem wrote:
All,
This version has been reorganized to separate the definitions of the TLVs
and sub-TLVs from the Extended LSAs (Alan Davey's suggestion).
It also includes the changes to the compatibility section discussed during
the OSPF WG meeting in London (David Lamparter's input).
Thanks,
Acee

On 4/18/14 8:36 AM, "[email protected]" <[email protected]>
wrote:


A new version of I-D, draft-ietf-ospf-ospfv3-lsa-extend-02.txt
has been successfully submitted by Acee Lindem and posted to the
IETF repository.

Name:           draft-ietf-ospf-ospfv3-lsa-extend
Revision:       02
Title:          OSPFv3 LSA Extendibility
Document date:  2014-04-18
Group:          ospf
Pages:          35
URL:
http://www.ietf.org/internet-drafts/draft-ietf-ospf-ospfv3-lsa-extend-02.t
xt
Status:
https://datatracker.ietf.org/doc/draft-ietf-ospf-ospfv3-lsa-extend/
Htmlized:
http://tools.ietf.org/html/draft-ietf-ospf-ospfv3-lsa-extend-02
Diff:
http://www.ietf.org/rfcdiff?url2=draft-ietf-ospf-ospfv3-lsa-extend-02

Abstract:
   OSPFv3 requires functional extension beyond what can readily be done
   with the fixed-format Link State Advertisement (LSA) as described in
   RFC 5340.  Without LSA extension, attributes associated with OSPFv3
   links and advertised IPv6 prefixes must be advertised in separate
   LSAs and correlated to the fixed-format LSAs.  This document extends
   the LSA format by encoding the existing OSPFv3 LSA information in
   Type-Length-Value (TLV) tuples and allowing advertisement of
   additional information with additional TLVs.  Backward compatibility
   mechanisms are also described.





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