IPv6 Tunneling and Transition
IP Infusion offers a set of IPv4-to-IPv6 transition software packages, including 6rd/4rd, 6to4, ISATAP, GRE, and IP-in-IP tunneling support. These protocols offer a mechanism for vendors to provide their users with methods for simultaneously supporting both IPv4 and IPv6. The information below briefly describes tunneling and transition tools offered with ZebOS®.
Transition and Tunneling Tools
6rd/4rd – IPv6 Rapid Deployment and IPv4 Residual Deployment consist of software that you can integrate into your existing gateways and CPEs. IPv6 Rapid Deployment provides IPv6 tunnels over your existing IPv4 access network between your CPEs and your gateways to provide your customers secure access to IPv6 networks and services. Similarly, if your access network is IPv6, IPv4 Residual Deployment provides stateless IPv4 over IPv6 tunnels for your existing IPv4 customers with efficient global IPv4 address sharing.
6to4 – The IPv4 to IPv6 transition (6to4) mechanism allows isolated IPv6 routing domains to communicate with other IPv6 routing domains, even in the total absence of native IPv6 service providers. This IPv6 transition tool allows both traditional IPv4-based Internet end-user sites and new IPv6-only Internet sites to utilize IPv6 and operate successfully over the existing IPv4-based Internet routing infrastructure.
ISATAP – The Intra-Site Automatic Tunneling Addressing Protocol is a transition mechanism used to transmit IPv6 packets between dual-stack nodes on top of an IPv4 network, by using IPv4 as a virtual non-broadcast multiple access network data link layer. Consequently, support is provided for multicast without an underlying IPv4 network infrastructure.
GRE – The Generic Routing Encapsulation protocol is a tunneling mechanism that encapsulates a wide variety of network layer packets inside IP tunneling packets. GRE creates a virtual point-to-point link with routers at remote points on an IP inter-network.
IPIP – IP-in-IP tunneling is a method by which an IP datagram is encapsulated (carried as a payload) within an IP datagram. Encapsulation is a way to alter the normal IP routing, by delivering the datagram to an intermediate destination that would not have otherwise been selected. An outer IP header is inserted before the datagram’s existing IP header and then the datagram is sent. At the intermediate destination, it is de-capsulated, thereby yielding the original IP datagram, which is then delivered to the destination indicated by the original Destination Address field.
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