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A Larger Loopback Prefix for IPv6

Document Type Expired Internet-Draft (individual)
Expired & archived
Author Mark Smith
Last updated 2013-08-24 (Latest revision 2013-02-20)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


During the development and testing of a network application, it can be useful to run multiple instances of the application using the same transport layer protocol port on the same development host, while also having network access to the application instances limited to the local host. Under IPv4, this has commonly been possible by using different loopback addresses within 127/8. It is not possible under IPv6, as the loopback prefix of ::1/128 only provides a single loopback address. This memo proposes a new larger loopback prefix that will provide many IPv6 loopback addresses. The processing rules for this new larger loopback prefix also allow sending or forwarding of packets containing these addresses beyond the originating router under certain circumstances.


Mark Smith

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