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Re: [v6ops] IPv6 LL-only as WG document - feedback requested

Mark ZZZ Smith <markzzzsmith@yahoo.com.au> Wed, 15 August 2012 09:42 UTC

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Date: Wed, 15 Aug 2012 02:41:54 -0700
From: Mark ZZZ Smith <markzzzsmith@yahoo.com.au>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
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Cc: "opsec@ietf.org" <opsec@ietf.org>, "opsec-chairs@ietf.org" <opsec-chairs@ietf.org>, "'draft-behringer-lla-only@tools.ietf.org' (draft-behringer-lla-only@tools.ietf.org)" <draft-behringer-lla-only@tools.ietf.org>, "v6ops v6ops WG (v6ops@ietf.org)" <v6ops@ietf.org>
Subject: Re: [v6ops] IPv6 LL-only as WG document - feedback requested
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Hi,


----- Original Message -----
> From: Brian E Carpenter <brian.e.carpenter@gmail.com>
> To: Carlos Pignataro (cpignata) <cpignata@cisco.com>
> Cc: "'draft-behringer-lla-only@tools.ietf.org' (draft-behringer-lla-only@tools.ietf.org)" <draft-behringer-lla-only@tools.ietf.org>; "opsec-chairs@ietf.org" <opsec-chairs@ietf.org>; "opsec@ietf.org" <opsec@ietf.org>; "v6ops v6ops WG (v6ops@ietf.org)" <v6ops@ietf.org>
> Sent: Wednesday, 15 August 2012 5:49 PM
> Subject: Re: [v6ops] IPv6 LL-only as WG document - feedback requested
> 
> Carlos,
> 
> On 14/08/2012 22:08, Carlos Pignataro (cpignata) wrote:
>>  Michael, Brian,
>> 
>>  Should "The Suggested Approach" 
> http://tools.ietf.org/html/draft-behringer-lla-only-01#section-2.1 also include 
> some prescriptiveness or specific recommendation regarding the use of RFC 5837, 
> instead of including that solution to interface identification as a 
> "Caveats and Possible Workarounds" only?
> 
> I have no strong opinion on this. Just indicating the existence of 5837
> seems OK, though.
> 
> Looking at the current text, it says that the loopback GUA MUST be used for all
> ICMPv6 messages, which is good, but it also says
> "ICMP error message can also be sourced from the global scope loopback 
> address."

Perhaps it would be better to be even more general, and just say ICMPv6 messages must come from addresses with a scope greater than link local? Restricting to GUAs suggests the idea in this draft can only be used when GUAs are available, yet I'd think it could also be useful in a private, non-Internet connected network too.

<snip>

Regards,
Mark.

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