HP 635n HP Jetdirect Print Servers - Practical IPv6 Deployment for Printing an - Page 37

Appendix B: IPv6 Service Discovery Apple has led the way in creating Zero Configuration IP networks. This leadership has resulted in the IPv4 Link Local configuration algorithm, multicast DNS, and DNS service discovery, all of which when implemented by Apple is collectively called "Bonjour". HP printers and MFPs were among the first to have Bonjour support with IPv4. Now, HP printers and MFPs that have IPv6 support also support Bonjour over IPv4 and IPv6 with firmware V.34.XX or later. Using Bonjour, IPv6 could automatically be selected to be used as a communication protocol transparently to the user. Bonjour is available for several different operating systems, not only MacOS. Bonjour works equally well for discovering services when the IP address range has been administratively configured. These services are local to the subnet that the computer running Bonjour is attached. In most cases, this limitation is fine. To expand service discovery to a larger network topology requires additional work that is beyond the Zero Configuration standard. In any case, whenever a DNS server is involved, the security of the server and the validity of its records become paramount in importance. Many confuse Bonjour with LLMNR. LLMNR is a way to establish and resolve link local names to IP addresses using IP multicast technology but doesn't involve service discovery. As an example of this difference, HP's Universal Print Driver uses the service discovery technology of Bonjour as one of its methods to find printers and MFPs. An alternative way of discovery services on the network is called Web Services Discovery or WS-Discovery. HP printer's and MFPs that support IPv6 support WSDiscovery over IPv6 using V.34.XX or later, support WS-Discovery over IPv4 and IPv6 with firmware V.36.XX or later, and support LLMNR with V.38.XX or later. Microsoft's Vista and HP Software will be using WS-Discovery extensively. 37