In this paper we give some background to how the long-lasting discussion on separation of identifiers and locators in networking has influenced the Information-centric Networking (ICN) research. We start with a historical retrospect of the id/locator discussion.

We then address the problems that have been fueling the discussion followed by a chronological walkthrough of a number of id/locator split ideas up tosome current ICN approaches. Finally we discuss a set of remaining research challenges that need tobe addressed before ICN could become a way to resolve the id/locator issue.

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