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[moonv6] /120 prefix length at UNH

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From: Alain Durand (Alain.Durand@Sun.COM)
Date: 10/14/03


moonv6 post from Alain Durand <Alain.Durand@Sun.COM>  From what our engineer reported from UNH tests, the plan on record is to use /120 prefixes for the backbone links at UNH.

This would be a violation of RFC 3513, section 2.5.1.

I'm concerned that if this network setup gets published, it would set up a dangerous precedent.

2.5.1 Interface Identifiers

    Interface identifiers in IPv6 unicast addresses are used to identify     interfaces on a link. They are required to be unique within a subnet     prefix. It is recommended that the same interface identifier not be     assigned to different nodes on a link. They may also be unique over     a broader scope. In some cases an interface's identifier will be     derived directly from that interface's link-layer address. The same     interface identifier may be used on multiple interfaces on a single     node, as long as they are attached to different subnets.

    Note that the uniqueness of interface identifiers is independent of     the uniqueness of IPv6 addresses. For example, a global unicast     address may be created with a non-global scope interface identifier     and a site-local address may be created with a global scope interface     identifier.

    For all unicast addresses, except those that start with binary value     000, Interface IDs are required to be 64 bits long and to be     constructed in Modified EUI-64 format.

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