Viagenie Aalyria Technologies Hewlett Packard Enterprise The IP protocol stacks used on Earth's Internet are typically configured based on assumptions of short delays and mostly uninterrupted communications. This document describes an architecture of the IP protocol stack tailored for its use in deep space. It involves buffering IP packets in IP forwarders facing intermittent links and adjusting transport protocol configurations and application protocol timers. This architecture applies to the Moon, Mars, and general interplanetary networking.