Hello and welcome back to I C u one interconnecting Cisco networking devices Part one
This episode 713 The different I P V six address types,
I am certain there it'll be instructive for this course. And last year we went over the I P six basics. We did some rules on shortening and lengthening the address and then lastly, howto find that prefix address with what we might know as the sub net i d.
This is sort of recovering the different address types, how they all work and how to sudden it. The network
so firstly rejected, we're gonna look at the address types and then we're gonna figure out how a sub nothing works.
Squid pre assessment here. See if you can remember this one. What address type starts with f E 80 give you a few seconds.
are the first We'll look at the Global unit cast address. So think of this originally as the original ideas I pee before. So you had one unique address for every single device on the entire Internet. So everyone had their own address. There was no private addressing scheme, right? There was no RFC 1918. There's no,
you know, 192.168 is on Lee
on your home network type thing. Every host device had a unique I p address on the Internet. So that's what your global unit CASS addresses is going back to. That style of everyone has a unique I p address or I p v c. Cas six address.
So what, you're gonna these companies is gonna be they're gonna ask. There are I are for a black of addresses which they're gonna get the i. R. They're gonna get that block from the I A N A.
so So you go from a slash 23 2 slashed 48 a slash 40. Then your company gets a slash 48 right,
You have a you have a slash 48 global rounding prefix
that is set for you.
Originally, the Global Unit CASS address started with a two or three, and that's generally what you'll see in exams or an ah lab exercises, stuff like that. But now the range is larger. It generally includes all addresses that are not assigned to other types of addresses, meaning the wink local
multi cast stuff like that. So anything that doesn't start with those address states that a reserved
is generally set. It is the will of the unit cast now. So if we look at the unique local address that is defined in our seat 41 93 So these I'd like to think of as your 1918 addresses your private I p addresses kind of each company's gonna use these address. Each one is going to kind of keep internal
so with, and you don't have to register for a block of addresses from your our i r or the I N A.
These addresses will start with F D. These are going to have a,
um, 40 bit Global idea or 10 hag school by B.
So, think of, you know, think of the members. Think of the globality as the network portion of the address. Then we're going to have a 16 bit
So what is it with 40 bits? Global idea, then 16. Best sudden that I d. That's gonna leave us half the address or 64 bids for the interface I d or the host portion that's actual unique to the host
There's a little bit of the match on their F D is eight Ghobadi 40 years, 48
So in the lab, we just want to create a easy global idea to remember You could do Ft. Colin Colin one You know, something like that's like a really easy to use globe I d
in production. No, you're gonna want to create a random globality. You're gonna want to use this. The random number generator in the
RFC 41 93 are used those parameters to create the gold body. Because if you think about if, if a company mergers, then you don't have it. If everyone's using a truly unique global i d. That's randomized than it's gonna make, you know, joining these networks a lot easier. Whereas, you know,
if everyone used the f. D. Colin Colin one as the global Eddie went to very large companies merge, then it's going to cause a huge networking and i p addressing hassle for that engineer.
So next we're gonna look at link local, so he's going to start with f E 80. These air generally used for routing.
So these link locals think of they're going to stay on that subject. They're gonna stand that link, right? The routers do not Ford link local addresses at all our link. Local packets
for hosts. They're used for nd Pierre the neighbor Discovery Protocol. Remember, that is the replacement kind of toe AARP the address resolution protocol.
The host will use the routers link local address that's on that land facing as their default gateway and routers will use the the next hop routers link. Local address is an ex cop. If you look in the routing table and these also are generally automatically,
So some netting is actually a lot easier
for now anyway, then I p version four because, uh,
people like to do things easy. Way right.
So if you look at that chart officer the right, we, you know, slash 23 from the i N A. We have a slash 32 we got from
And then we have a slash 48 for our company. And then from there we want to do a slash 64 for a sub net. So that gives us about 65,000 sub nets that we can work with.
So has more than enough snow. That's truly that we should need. But you also gotta remember where the subjects are gonna be needed. They're going to need it on those away and links between the routers. They're gonna need each V land. Our land is going to need one.
Um, remember that global routing prefix is set by the A i a n a or you're our i r
one of those people that you got that block about dresses from this set by those registries and the sub net. The blue portion there is set by you is the engineer.
Then the interface I d is gonna be the same ID thing is like the host portion of vipers four host address.
It's gonna be that unique. Identify WR for that host device.
So if we have a 64 sub net on a slash 48 sight, leaving us the 16 bits for submitting against 65,000 suddenness with a
a huge amount of addresses per sub net 10 raised to 18.
So if we want to list out all of our sub nets, we could do that Bottom one there. The 2112 a, B, c, D. 12340000 Through
the same thing F f f f
it will be that same thing. It's not gonna list out that many of this. You get the idea.
We're looking back in this recap here. We went over the globally unique I. D. S. Her interface dresses. We went over the unique local addresses, which is like your private addresses. We looked at the link locals, which only stay on that sub net that the routers do not Ford.
And lastly, looked at how I p version six is submitted
and we'll move into the post system here. What does the unique local address start with? Give me a few seconds.
All right, so that starts with F d. Remember, the link local is Effie 80
two or three gin. It is.
It was the original one for the global.
And the next lesson we're gonna look at i p att. Addressing on routers. And as always, if you have questions need help. Feel free to shoot the message. Otherwise, thank you for washing this lesson for just seeing your next one