Hello and welcome back to I C. Ndy one interconnecting Cisco networking devices. Part one.
This s 07 to 3 of the other router addresses.
I'm trending wannabe instructor for this course. You know, as video went over it, how to add an i P V six address to an interface. We did it manually. We let the link local dress get to you. I 64 address automatically and then also went over how the systems actually used the wife 64. And how it gets that from the Mac address
is that sort of recovering. How the link local dresses air used. We're gonna cover how the writers actually use them. And also, we're gonna cover the multi CASS and Annie casts.
And like I said, we're looking router link local dresses first, then then we'll look at the multi CASS address.
So quick, Pre assessment first. What does the link Local address start with. Hopefully should have this one by now.
All right. It is f e 80.
So do you dress cities by robbers again when cloak address f e 80. What is he actually used for? And routers is gonna be that next top address in the routing table. Remember, the host use that as their default gateway.
So Cisco routers created address automatically with the U. S. 64 as we saw or you can autumn air, you can place it in yourself, which we had done on the serial interface.
Once the I P V six address command is used, it will automatically create a link. Local address for it. If you would say, create a global address that is going to create that link local one automatically,
or you can manually input it by using that link local at the end of the address.
So again, we enable the Ivy six on the runner with that
56 interface command. So the fuse, the Interface Command versus the PB six enable our unit CASS, route in command in the global config. This will just create that link local address. It's not gonna create any global, you know, CASS, address,
air and a unique address like that. So the reason why you might do this and just let it do its thing and create its own like local, um so humor I pee before slash 30 networks where we had our way in links between the routers. You probably don't need a global unit cast address for that. You You know,
you probably only need a link. Local address, because remember, it only talks on that sub net.
You probably don't need that full global unit cast. You could probably just allow it to create its own, like local address.
So if you look at the multi cast addressed, it is utilized much more. An I P v six is that it was I'd be before because we're gonna look at less broadcast. Less processing has to be done by each host. If they look at the multi Kasam. Say, okay, I'm not a part of this group. I don't need to process this packet.
So is utilized. A lot more is less overhead.
So we look at each routing protocol has its own multicast address in there. If we looked at rip n g again ff zero to Colin Colin, 90 s. P f. We have the f 0205 r concho on five. Cone cone six for the designated routers. Yeah, g r p f zero to corn corn A um
so the F 08 That's within your link. Local scope. You know, it's not gonna be that local sub net for that address.
The FBI's here, too, is going to be usually that organizational local scope the enterprise level once was, you know, gonna stay within your large, you know, your man, or you're
it's going to stay within. The large
idea of your organization is not gonna actually route onto the internet.
So if we look at finally the last multicast Cicely solicited note address, so think of these is kind of like a semi unique multicast address that is created by each note. And these are going to start with a zero to Colin Colin one colon FF. So the slash 104 is the
and like that something. So that remains with six digits,
Six digits left of that 104 being, uh,
six times four is 24 +104 equals 1 28 See if your 428 digits her bits.
So the last six digits, that's the same as your unit, CASS, address that you set up.
So finally, the cool thing about I p v six, If we look at our any cast. This is awesome. That is implemented right away. It's, uh,
think of in any caste address as you have multiple points on a network with the same I p address
That kind of like subscribe to a service if you think of like, um, they have a certain purpose.
So a host on, you know, faraway network and type in. You know, this this network addresses this any caste address and was gonna do it's actually gonna route into the nearest point where that device is actually enabled or that I p address is enabled.
So let's say you are in trouble in a four country or you're somewhere you're in Germany re in the US and you tape in amazon dot com. You're not always gonna be placed on that same server farm that, let's say, is in California or somewhere in Texas. You're not always gonna be going at same one. You're gonna be going to where
the closest addresses for you. That's kind of like how any caste works.
Um, it's going to use less routing because it's gonna pick that closer spot. That's a lot for him.
So some of the other addresses that we have. We have unknown address or all zeroes or just double Cohen's. This is used in finding I p addresses for Dynamic. It could be used in slack R S L A C. We have our loop back addresses, always, which is 127 binary zeroes and one number one. Or you could just do Colin Colin. One.
The reason why we use this is do we can use it to test our protocol stacks so it won't actually leave that interface,
But it will go all the way up or go away. Down. Go away, Back up.
So we look at our episode Recap We went over the link local scope of the multi cast addresses. We went over our solicited note addresses, and we went over the concepts of any caste and family. We looked at the quick on known and Luke bag addresses.
So see, if you remember here from that chart, what is the all routers multicast address?
I'll give you a few seconds.
All right. It is f f zero to Kahlan. Kahlan, too.
In the next episode, we're gonna look at i b b six addressing on the hosts this time.
And as always, you guys have questions. Need help. Feel free to shoot the message. Otherwise, thank you for washing this episode. I look forward to seeing you arrest him.