Re: I-D ACTION:draft-ietf-bfd-generic-00.txt

Suping Zhai <> Thu, 21 July 2005 02:43 UTC

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Date: Thu, 21 Jul 2005 10:36:48 +0800
From: Suping Zhai <>
To: Carlos Garcia Braschi <>, bfd <>
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Subject: Re: I-D ACTION:draft-ietf-bfd-generic-00.txt
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Hi Carlos,
I am sympathy with you regarding this generic draft. 
And more I think that it's better if all the BFD related applications including IGP, BGP, MPLS and static routes can go together into one draft.

And another note, in this draft section 2, it reads as followings,
   The service interface with BFD is straightforward.  The application
   supplies session parameters (neighbor address, time parameters,
   protocol options), and BFD provides the session state, of which the
   most interesting transitions are to and from the Up state.  The
   application is expected to bootstrap the BFD session, as BFD has no
   discovery mechanism.

Perhaps, the session paramters of time parameters is the responsiblity of BFD session its self, not supplied by application.

I dont' what's opinions?

>Reading the generic document, I now have a doubt: shouldn't mentions
>to OSPF and IS-IS in the 1-hop draft go in a separate "IGP application
>document" or "OSPF / ISIS application document"? Most of the content
>is not related to the 1hop functionality but rather with BFD-protocol
>interactions, including Graceful restart.
>Or perhaps, as another example in the generic draft?
>For example, the Graceful restart mentioned in the 1hop draft, is
>probably applicable to all protocols that have Graceful restart (as
>BGP), not only to IGPs.
>I know it is a non negligible amount of editorial work, but will
>probably lay out a clear structure for the BFD standards... that, with
>the count already up to more than four drafts for BFD, may be a good
>thing. (or not, it probably depends).
>2005/7/16, <>:
>> Date: Fri, 15 Jul 2005 15:50:02 -0400
>> From:
>> Subject: I-D ACTION:draft-ietf-bfd-generic-00.txt
>> To:
>> Cc:
>> Message-ID: <>
>> Content-Type: text/plain; charset="us-ascii"
>> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>> This draft is a work item of the Bidirectional Forwarding Detection Working Group of the IETF.
>>         Title           : Generic Application of BFD
>>         Author(s)       : D. Katz, D. Ward
>>         Filename        : draft-ietf-bfd-generic-00.txt
>>         Pages           : 7
>>         Date            : 2005-7-15
>>    This document describes the generic application of the Bidirectional
>>    Forwarding Detection (BFD) protocol in environments not specifically
>>    documented in other specifications.  Comments on this draft should be
>>    directed to
>> A URL for this Internet-Draft is:
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