Re: [Roll] trickle-mcast-04 - Clarify scope value of 3 - subnet-local

"Ralph Droms (rdroms)" <rdroms@cisco.com> Fri, 12 July 2013 00:05 UTC

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From: "Ralph Droms (rdroms)" <rdroms@cisco.com>
To: Ulrich Herberg <ulrich@herberg.name>
Thread-Topic: [Roll] trickle-mcast-04 - Clarify scope value of 3 - subnet-local
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Date: Fri, 12 Jul 2013 00:05:13 +0000
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Cc: Routing Over Low power and Lossy networks <roll@ietf.org>
Subject: Re: [Roll] trickle-mcast-04 - Clarify scope value of 3 - subnet-local
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On Jul 11, 2013, at 6:29 PM, "Ulrich Herberg" <ulrich@herberg.name> wrote:

> On Thu, Jul 11, 2013 at 2:14 PM, Michael Richardson
> <mcr+ietf@sandelman.ca> wrote:
>> 
>>> The most recent rev of draft-droms-6man-multicast-scopes defines scope
>>> 0x03 as:
>> 
>>> 3  Network-Specific scope, greater than Link-Local scope, defined
>>> automatically from the network topology
>> 
>>> To be confirmed: will this definition suffice for MPL?
>> 
>> I think it is sufficient, because we understand what it means.
>> I am concerned about the word "Network"... which could mean anything to anyone.
>> 
>> I'd think that the right word would be "subnet", because the intent is that
>> it is for the entire /64 or whatever it is that one is using.  I think that
>> is the term that is used in RFC4291.
> 
> 
> I think that having a network-wide, multi-link subnet is a bad idea:
> http://tools.ietf.org/html/rfc4903

That decision has already been made and is carried through many protocols..

- Ralph

> 
> Regards
> Ulrich