Research around the tenets of a next generation Internet architecture has resulted in numerous future Internet proposals, both evolutionary and clean slate. One promising approach is the identifier/locator split, which opens a new paradigm of network communications by using static node identifiers uncoupled from the actual network location. In this work, we validate our instantiation of an id/loc splitted next generation Internet architecture in respect of legacy application support. Our

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... pe implementation demonstrates that existing SIP services can benefit from the inherent capabilities of the proposed architecture in terms of transparent mobility and security support. Public Key Node Identity FQDN Hash() Network Address (IPv4 / IPv6) local global, unique user domain @ Resolution() Private Key SIP URI Figure 5. Relationship between SIP URIs, NIDs, FQDNs and locators. Legacy packets interceptor and handling mechanisms were implemented using the Iptables tool to capture legacy packets