Designating 6LBR for IID Assignment
draft-rashid-6lo-iid-assignment-03

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Last updated 2017-09-13 (latest revision 2017-03-12)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at
https://www.ietf.org/archive/id/draft-rashid-6lo-iid-assignment-03.txt

Abstract

In IPv6 Stateless Address Autoconfiguration (SLAAC), randomizing the interface identifier (IID) is a common practice to promote privacy. If there are a very large number of nodes, as has been discussed in several use cases, the effect will to proportionately increase the number of IIDs. A duplicate address detection (DAD) cycle is needed for each configured IID, introducing more and more overhead into the network. Each failed DAD requires the initiating node to regenerate a new IID and undergo the DAD cycle again. This document proposes an optimized approach when higher privacy is required in a given network by allowing a 6LBR (6LoWPAN Border Router) to provide a unique IID, avoiding any potential duplication. Such practice also prevents failure of time-critical applications, by enabling 6LBR to provide a unique IID, in case of address collision. Further improvements are proposed to enable multiple concurrent DAD cycles, and to return the randomized IID from 6LBR to 6LN in a space- efficient manner.

Authors

Abdur Sangi (sangi_bahrian@yahoo.com)
Mach Chen (mach.chen@huawei.com)
Charles Perkins (charliep@computer.org)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)