From: <ebi...@xm...> - 2012-06-15 21:20:11
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I would really appreciate being able to tell a 6bed4 address when I see one. Let me recommend using the format: ::64bd:PP:II:II Having the port and the ipv4 address being contiguous should make it easier for software to process. Putting the ipv4 address in the bottom most bits allows address to be written like ::64bd:8080:12.34.56.78 to instead of their more typical ipv6 form of ::64bd:8080:0c22:384e Using a well known value 64bd makes these 6bed4 addresess easy to spot from a mile away, and it makes it clear these are not MAC48 identifiers mapped into EUI64 identifiers. The leading value of 64bd also has the nice property that it leaves the interface identifer in modified EUI-64 format and has the u and g bits clear indicating it is not assigned by IEEE aka universally unique and not a multicast group address. Also having the magic number in the highest bits of the address makes these addresses a clear subset of the addresses on a normal lan so you could if you choose overlap 6bed4 addresses and addresses from other sources in the same /64. Eric |