Re: [OSPF] FW: New Version Notification for draft-ietf-ospf-ospfv3-lsa-extend-02.txt

Peter Psenak <ppsenak@cisco.com> Fri, 18 April 2014 16:18 UTC

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Date: Fri, 18 Apr 2014 18:18:00 +0200
From: Peter Psenak <ppsenak@cisco.com>
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To: Acee Lindem <acee.lindem@ericsson.com>, OSPF - OSPF WG List <ospf@ietf.org>
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Subject: Re: [OSPF] FW: New Version Notification for draft-ietf-ospf-ospfv3-lsa-extend-02.txt
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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, "internet-drafts@ietf.org" <internet-drafts@ietf.org>
> 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.
>>
>>
>>
>>
>>
>> Please note that it may take a couple of minutes from the time of
>> submission
>> until the htmlized version and diff are available at tools.ietf.org.
>>
>> The IETF Secretariat
>>
>
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