From the course: Cisco Networking Foundations: IP Addressing

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IPv6 loopback

IPv6 loopback

From the course: Cisco Networking Foundations: IP Addressing

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IPv6 loopback

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- [Instructor] An IPv6 loopback address is a special address that a device, such as a router, or a PC, can use to talk to itself. So in this example, if R1 wants to communicate with itself, it can send traffic to that IPv6 loopback address, which is written as ::1. And from that, you could probably guess, the format of this IPv6 loopback address, it's made up of 127 zeros, followed by a single one. And again, we write that as ::1, and you might hear this referred to as the loopback, the local loopback, or the local host. And this is very similar to what we talked about with IPv4, IPv4 had a loopback address of 127.0.0.1. Well, ::1 is the IPv6 version of that. And we could use this loopback address to make sure that IPv6 is up and running on this interface, on our device, or a web developer as another example. They might have a website running locally on their machine, and they could point their browser to ::1, to pull up and…

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