Re: [Softwires] MUST or must for /96 in draft-ietf-softwire-multicast-prefix-option-03?

Tom Taylor <tom.taylor.stds@gmail.com> Fri, 29 March 2013 16:11 UTC

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Date: Fri, 29 Mar 2013 12:11:45 -0400
From: Tom Taylor <tom.taylor.stds@gmail.com>
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Subject: Re: [Softwires] MUST or must for /96 in draft-ietf-softwire-multicast-prefix-option-03?
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Apologies, that second question is covered thoroughly by client 
behaviour, section 5.

On 29/03/2013 12:05 PM, Tom Taylor wrote:
> I actually have two questions about the prefix-length fields in the option.
>
> First, in section 4, there is the statement:
>
>     When ASM_PREFIX64 and SSM_PREFIX64 are configured, the length of
>     these prefixes must be /96.
>
> Is that meant to be a MUST?
>
> The second question is whether the absence of a particular prefix from a
> particular option is indicated by a prefix length of zero. If so, should
> that be mentioned somewhere in section 3, or is it covered by standard
> DHCP practice?
>
> Tom Taylor