From the course: Cisco Networking Foundations: IP Addressing

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IPv6 unspecified

IPv6 unspecified

From the course: Cisco Networking Foundations: IP Addressing

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IPv6 unspecified

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- [Instructor] Here's an interesting IPv6 address. It's an IPv6 unspecified address. Here, PC1 has an unspecified address of colon colon, in other words, all 128 bits are zeros, and we're sending traffic to FF02::2, which goes to all routers on a local link. So the traffic makes it to R1, but that double colon address is an abbreviation of 128 zeros, and we simply write it as colon colon. We're replacing all eight zero quartets in other words, with that double colon. But how can this PC communicate with an all zeros address? Well, let me give you a couple of examples of when we might see this. First, let's say that PC1 wants to give itself an address, and after it goes through that process, and we'll discuss that process later in this chapter, before it assigns that address that it's calculated, it wants to make sure that nobody else has that address. So it sends out a neighbor solicitation message saying, hey, I just want to…

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