Oracle's SEFOS IPv6 is an implementation of the core set of IPv6 protocols. The major issues being faced with IPv4 are the exhaustion of the IP address space and enormous growth of the routing tables in the main routers on the Internet. IPv6 solves these problems by providing features such as address auto-configuration. You can use SEFOS IPv6 either as a router with router-specific functionality or as a host with host-specific functionality. This figure shows the position of IPv6 within the SEFOS architecture.