![]() ![]() ![]() ![]() It has the lowest overhead but can only transmit IPv4 unicast traffic. It's typically used to connect two internal IPv4 subnets through public IPv4 internet. IPIP tunnel, just as the name suggests, is an IP over IP tunnel, defined in RFC 2003. This post covers the following frequently used interfaces:Īfter reading this article, you will know what these interfaces are, the differences between them, when to use them, and how to create them. A list of tunnel interfaces, as well as help on specific tunnel configuration, can be obtained by issuing the iproute2 command ip link help. Anyone with a network background might be interested in this information. There is no code analysis, only a brief introduction to the interfaces and their usage on Linux. In this article, I will give a brief introduction for commonly used tunnel interfaces in the Linux kernel. Linux has supported many kinds of tunnels, but new users may be confused by their differences and unsure which one is best suited for a given use case. ![]()
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March 2023
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