Summary

Recommendation ITU-T Y.2015 begins with showing the limitations of the conventional IP architecture, which uses IP addresses as both node identifiers (IDs) and locators, on supporting mobility, multi‑homing, fast endpoint renumbering, traffic engineering, and scalable routing. It then shows that ID/locator separation, i.e., the use of distinct sets of values as node IDs and locators, helps to overcome these limitations. This Recommendation provides general requirements for introducing ID/locator separation in NGN.