Duplicate Address Detection Proxy
RFC 6957, “Duplicate Address Detection Proxy”, is a Proposed Standard document published in June 2013 by F. Costa, J-M. Combes, X. Pougnard, H. Li. The canonical text is published by the RFC Editor.
Abstract
The document describes a proxy-based mechanism allowing the use of Duplicate Address Detection (DAD) by IPv6 nodes in a point-to-multipoint architecture with a "split-horizon" forwarding scheme, primarily deployed for Digital Subscriber Line (DSL) and Fiber access architectures. Based on the DAD signaling, the first-hop router stores in a Binding Table all known IPv6 addresses used on a point-to-multipoint domain (e.g., VLAN). When a node performs DAD for an address already used by another node, the first-hop router defends the address rather than the device using the address.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 6957 is hosted at rfc-editor.org. Available in TXT,HTML.
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