 that implement SNMP agents, which can effectively mean all kinds of nodes present in the internet: hosts, routers, switches, and SO forth. The information that IPv6 MIBs provide about a node include IPv6 routes, default router table, setting for enabling and disabling forwarding, setting values to Hop Limits, providing interface and system statistics, what IPv6 prefixes the node has, what IPv6 addresses node has configured, IPv6 address to physical address mapping table, ICMPv6 statistic tables, and SO on. The information delivered with the help of IPv6 MIBs is essential for managing IPv6 networks. The IETF has also defined a set of IPv6 related MIBs in addition to the core IPv6 MIBs, and more are in the pipeline. The already existing additional MIBs include, for example, 'RADIUS Authentication Server MIB for IPv6' [156], 'Proxy Mobile IPv6 Management Information Base' [157], and 'IP Multicast MIB' [158]. In this book we will not look at the SNMP or MIBs in any more depth than what has already been said. Interested readers should look at the referenced RFCs or at textbooks dedicated to SNMP MIB. 3.11 Validation and Certification In traditional IETF style, the IPv6 protocol suite does not have any facilities in place for official certification or type approval. However, protocol test suites do exist to help vali- date implementations, conformance against IPv6 standards and to ensure interoperability between implementations. In this section we will give a brief view of what is available in the marketplace. 3.11.1 Test Suites A very well known free IPv6 conformance test suite was created and has been maintained by the TAHI project, see http://www.tahi.org. The TAHI project was established in Japan at 1998 by three organizations: The University of Tokyo, Yokogawa Electric Corporation, and YDC Corporation, the last of which is no longer participating in the project. The suite covers all the core IPv6 specifications and also additional features such as IPsec and MIPv6. In September 2012 the project announced that it w