Subnet ID Deprecation for IPv6

Document Type Expired Internet-Draft (individual)
Last updated 2019-09-04 (latest revision 2019-03-03)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Deprecation of the subnet ID in IPv6 networking is proposed; the subnet ID is set to zero so that all nodes in a site carry the same prefix. While the procedures for neighbor discovery and duplicate address detection have to be changed, possible simplification gains in IPv6 networking including that of intra-site host- and subnet- mobility might be worth the modification. Site-external behaviors don't change through this modification, enabling incremental deployment of the proposal. Sites of manageable sizes for which scalability is not much a critical issue might consider the mode of operation proposed in this document.


Kim Dy (

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