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6to4 What is it? (introduction text courtesy of Wikipedia) 6to4 (sometimes written 6 to 4) is a system that allows IPv6 packets to be transmitted over an IPv4 network (generally the IPv4 internet) without the need to configure explicit tunnels. Routing conventions are also in place that allow 6to4 hosts to communicate with hosts on the IPv6 internet. It is typically used when an end site or end user wants to connect to the IPv6 internet using their existing IPv4 connection. Since IPv6 is not required to be configured or supported on any nearby networking devices relative to the host, 6to4 is especially relevant during the initial phases of deployment to full, native IPv6 connectivity. However, it is intended only as transition mechanism and is not meant to be used permanently. 6to4 may be used by an individual host, or by a local IPv6 network. When used by an individual host, that host must have IPv4 connectivity and a global IPv4 address, and the host is responsible for encapsulation of outgoing IPv6 packets and decapsulation of incoming 6to4 packets. Many host operating systems implement this encapsulation and decapsulation via a 6to4 pseudo-interface. When 6to4 is used by a local network, the entire local network needs only a single IPv4 address. Within that network, hosts learn their IPv6 addresses and routing using ordinary router discovery protocols, just as on a native IPv6 network. 6to4 does not facilitate interoperation between IPv4-only hosts and IPv6-only hosts. Tele2 service / position Tele2s 6to4 setup currently consists of four relays placed in Amsterdam, Frankfurt, Paris and Stockholm. All based on the Cisco 7600 series platform and with multiple 10GE connections to the rest of the Tele2 network ensures ample capacity for our users. The Tele2 6to4 relays are announced to all adjacent networks and so if you are a peer or downstream of Tele2, you may use this service. If you cannot currently reach this service and would like too, see the transit page. Tele2 6to4 service statistics |
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