Jeffrey,

On 2008-12-13 15:18, Dunn, Jeffrey H. wrote:
> Colleagues,
> 
> I have a question about the following language in section 2.0:
> 
> "For all unicast addresses, except those that start with the binary
> value 000, Interface IDs are required to be 64 bits long and to be
> constructed in Modified EUI-64 format. "

This exact text is also present in RFC4291 section 2.5.1. As far as I know,
this has been part of the IPv6 address architecture since 1998 (RFC2373).

> Although I do not see a MUST in this sentence, it appears that the
> proposed standard is mandating that all interface IDs be 64-bits long.
> This is not a requirement in several RFCs listed below. As a result, I
> believe that this requirement should be stricken from the document.

That would be a no-op, since it's already required by RFC4291.

    Brian
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