Billion 7800DXL User Manual download pdf (Page 154)

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IP Tunnel

An IP Tunnel is an Internet Protocol (IP) network communication channels between two networks of

different protocols. It is used to transport another network protocol by encapsulation of its packets.

IP Tunnels are often used to connect two disjoint IP networks that do not have a native routing path

to each other, via an underlying routable protocol across an intermediate transport network, like VPN.

Another prominent use of IP Tunnel is to connect islands of IPv6 installations across the IPv4

internet.

IPv6inIPv4

6in4 is an Internet transition mechanism for migrating from IPv4 to IPv6. 6in4 uses tunneling to

encapsulate IPv6 traffic over explicitly configured IPv4 links. The 6in4 traffic is sent over the IPv4

Internet inside IPv4 packets whose IP headers have the IP Protocol number set to 41. This protocol

number is specifically designated for IPv6 capsulation.

6RD:

6RD is a mechanism to facilitate IPv6 rapid deployment across IPv4 infrastructures of internet

service providers (ISPs).

It is derived from 6to4, a preexisting mechanism to transporting IPv6 packets over IPv4

infrastructure network, with the significant change that it operates entirely within the enduser’s ISP

network, thus avoiding the major architectural problems inherent in the original design of 6to4.

Click Add button to manually add the 6in4 rules.

Tunnel Name: User-defined name.

Mechanism: Here only 6RD.

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Billion 7800DXL User Manual Page 154