HP 635n HP Jetdirect Print Servers - Practical IPv6 Deployment for Printing an - Page 20

To maintain and promote our general sanity, we will match our subnet values for IPv6 with the subnet values for IPv4 as shown: Figure 15 - Unique Local Network Configuration This unique-local IPv6 range was done only for example purposes so please do not use it in actual deployments. In addition, the IPv6 link local address is still available to be used, just not shown. The rest of this whitepaper will use the non link local IPv6 range assigned for use in documentation, 2001:0DB8::/32. IPv6 Stateless Automatic Address Configuration (SLAAC) Assuming the network administrator decides to upgrade the IPv4 router to support IPv4 and IPv6 or adds a separate router to support IPv6 routing, suddenly the network behavior could change quite drastically because IPv6 supports automatic IPv6 address configuration. In order to configure an IPv6 router, non link local IPv6 addresses associated with the links need to be configured. In most cases, once a non link local IPv6 address has been configured on the router, the router will provide IPv6 Automatic Address Configuration to the link segment. A standard part of the IPv6 initialization process for end nodes (like HP printers and MFPs) is to look for IPv6 routers so that they may provide IPv6 automatic address configuration information. Suddenly, every IPv6 enabled device now has at least two IPv6 addresses: A link local IPv6 address and a non link local IPv6 address. Refer to Figure 16 - IPv4/IPv6 Network 20