HP 6120XG HP ProCurve Series 6120 Blade Switches IPv6 Configuration Guide - Page 28
IPv6 Propagation, Dual-Stack Operation, traffic. While IPv4 and IPv6 traffic coexists on the same VLAN
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Introduction to IPv6 Migrating to IPv6 Note IPv6 Propagation IPv6 is currently in the early stages of deployment worldwide, involving a phased-in migration led by the application of basic IPv6 functionality. In these applications, IPv6 traffic is switched among IPv6-capable devices on a given LAN, and routed between LANs using IPv6-capable routers. Using the IPv6 features in this software release, the switch can operate in an IPv6 network, be managed using an IPv6 management station, and interact with DHCPv6 and IPv6-enabled DNS servers in the same network or accessible through a connection to an IPv6 router. Dual-Stack Operation Since most initial IPv6 deployments are in networks having a mixture of IPv6 and IPv4 hosts, the software supports dual- stack IPv4/IPv6 operation. This enables the switch to communicate individually with IPv4 and IPv6 devices with their respective protocols. Thus, IPv4 and IPv6 traffic is supported simultaneously on the same VLAN interface. This means that both IPv4 and IPv6 devices can operate at the same time on a given VLAN. The software does not include gateways for translation between IPv6 and IPv4 traffic. While IPv4 and IPv6 traffic coexists on the same VLAN, the individual IPv4 and IPv6 devices ignore each other's traffic. To forward IPv6 traffic from the switch to an IPv6-capable device on a different VLAN, a link to an external IPv6-capable router is needed. Also, IPv6 traffic movement from the switch over IPv4 paths requires routers capable of IPv6 over IPv4 tunneling. 2-4