HP 635n HP Jetdirect Print Servers - Practical IPv6 Deployment for Printing an - Page 9

Figure 3 - Two Link Local Networks The first thing that should be pointed out is that routing is not possible with these Link Local environments. A router is shown, but this router will not forward any link local traffic from one network to the other. In addition, the router will not forward destination IP addresses in the IPv4 Link Local Multicast range (224.0.0/24), any limited broadcast packets (255.255.255.255/32), or any subnet broadcasts (169.254.255.255/32). Therefore, a user on Vista1 executes the following command: "ping mfp2". The name resolution will fail because MFP2 will never receive any link local name resolution traffic. In short, Link Local Network 1 does not know Link Local Network 2 exists and vice versa. LLMNR Support in HP Jetdirect Just to shake things up a bit, HP Jetdirect introduced LLMNR support based on RFC 4795 in firmware versions V.38.XX and later, which was just introduced in 2008. As time goes on, LLMNR support in HP devices will gradually increase of course, but since it is not widely available, this whitepaper will cover LLMNR in separate sections. Let's look at a new diagram, Figure 4 - LLMNR. Figure 4 - LLMNR 9