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I'd add to this model that here again.

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So in this lecture I have to speak about the ICMP proxy.

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That's something we can see it when you install the multicast package on the market across the U.S.

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that you have also agent by proxy.

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So what is exactly IP proxy and how it works?

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So all of this we are going to cover and disallowed.

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As you can see here, we have a level of five points before I start doing those points.

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Let me just go to the explanation about what is the Asia IP proxy.

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So I expect to you exactly what the Asia IP proxy, where should we use it?

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Then I will come back to the points I started with now.

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So what is ICMP proxy?

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We remember that we were talking about the beginning of this course.

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We spoke about the PIM and we said that once you have more than two routers, then in this case you

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require to have some mechanism to allow this multicast to pass through.

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And we said that the PIM is something like a routing protocol for multicast.

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So in case you have a small network, instead of using the PIM, you can use Asian PE proxy.

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So you have B proxy is similar to PIM somehow.

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So then when you have more than one rather than you can use the Asian IP proxy.

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Now it is simple.

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So compared to payments is simple to be configured.

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That's one of the features that the test.

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It can be used one Pim and so on.

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I think the pin when we say Pim, that's Pim Esim SMS spares multicast because there is another PIM

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which is called the benchmark non multicast, the MTM.

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But that's not on my project.

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The only protocol that is on my codec is called Pim, but we always refer it as spam.

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So I guess you have some topology you cannot use PIM, that azure IP proxy can be used that that is

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one of the advantage that it can has.

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So if you want to do multicast and you cannot use pair for some of the reasons, you can still make

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multicast using the AJP proxy.

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And the third feature it has are less resources on the microphone, rather.

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So you will see that the once you use a GAAP proxy, then the resources like the shape of the memory

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that they are going to be reserved for the multicast.

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Traffic will be less on the microphone across the.

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Now, very important to note on the IGF bureaucracy, there are two acronyms which would call them the

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upstream and the downstream.

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Before we speak about the upstream downstream, that is a very important thing here.

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That said, that is tall Asian bureaucracy on a small network because it does not support more than

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one upstream integration.

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I'm going to speak about this to upstream and also in case there is some routing loops, that HAARP

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proxy cannot detect them or avoid them.

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So for this reason, in case you have a small network that you can use as a proxy to make the multicast,

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but once your network becomes big, please use them.

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So what is the upstream and downstream interfaces?

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So those are two acronyms that we should know on why?

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Because why would we want to configure the HAARP proxy?

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We have to configure the upstream and downstream interfaces.

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So when you say an upstream interface, that means that's where the market gas traffic is coming from.

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So that's upstream the downstream interface.

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That means where the market cuts traffic is going out of it.

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So to make it easy for you, let me just show you this graph so you can understand it better say that

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this day will see streaming sugar and it is decline and now we have to wrap as well using HAARP proxy.

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So the traffic is coming from the server to this rather.

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So Internet one is called upstream.

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The traffic is moving its interface.

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It's an AI tool that the discord downstream over here, the traffic is coming to Internet too.

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That's upstream.

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The traffic is leaving it and that's why and that's the downstream very important to know upstream and

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downstream.

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So just put in your mind once the traffic is coming to an interface for a multicast server, for example,

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that's the upstream when it it's leaving an interface.

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That's the downstream.

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Alright.

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Do not make confusion on that because we have to configure them what we want to do the lot.

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So now as a brief, the Asian IP proxy is similar to PIM when you have more than two rules, but also

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it can be used on one router.

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It's not the only once you have more than two others and in our lab we will see that we are going to

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use only one rather.

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But just to put in mind that it has some features, like it has less resources on the SPU.

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It's easy to be configured, but you have to be careful that once your network becomes big.

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So please use Pivot because this one does not detect the other loops that may happens and now will.

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Also, we spoke about the upstream downstream.

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So once the traffic of the multicast is coming to an interface, that's the first should be upstream

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when it's leaving the interface, it is the downstream.

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So now we understand about the IGP proxy, let's see what this to our loop scenario and let's start

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doing the lab.

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So my lab scenario is still the same.

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I didn't do anything.

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I only have taken out the configuration for the Amotekun spot that we have done using the IGP version

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too.

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But as for the IP addresses, everything are still the same.

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I don't have here server.

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I have the router here.

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I had vashi client over here.

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What I'm going to do now I have to make Asia IP proxy over here on this charter.

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This interface should be upstream or downstream.

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Think of it for a second.

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That's correct.

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Should be upstream because traffic is coming to it.

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And this should the fish will have to make it downstream and then we have to see if it's going to work.

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That's all what we need to do on the IGP proxy.

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Now let's go back to the ports and start doing the port.

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Number one, make it or not the one as an upstream and internet two as downstream interface and then

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check the result.

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Let's just put the picture.

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Let's do it.

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We go to the.

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First, let me show you that I have already taken out all the configuration that were over here.

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So you can see on the interfaces.

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We don't have anything, but we still have the IP addresses.

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You can see IP addresses and also on the server, on the client, on the server also have the row.

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So everything is the same as the last step, but only the Congressional Independent is taken out.

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Now let's do the configuration.

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We have to go to routing.

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We have Asia IP proxy.

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Over here, you can see you don't have too much of options on the AGP proxy.

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All you need to do is to say plus and I will say here, it's not what I want it to be.

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The upstream.

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So you check the upstream and okay and and we go to plus it's not too I don't want that to be the upstream

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so I uncheck it.

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I don't check it.

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That's it.

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So you can see that it's in that one has an you behind it you miss upstream.

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So if you just leave the mouse on it in a moment, you should see that it is upstream.

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Very good.

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So that's all the operation that you need to do.

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You see, it's not very difficult.

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Let's see.

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Now the result, what's going to happen.

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But number one is dump whatever to enable the streaming from the server and check if the client is able

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to receive the stream.

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So I'm going to go not to discover, I'll just enable the streaming.

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All that's on the server.

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The streaming is enabled.

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Let's go to the client, which is my computer.

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What?

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I'm recording this video.

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I go to the Velshi.

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And I go to the network and then over here it should be.

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You did be pushing nine one, two, three column.

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One, two, three, four.

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Okay, play.

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And here we go.

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So you can see that historically working.

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So this is the video, actually, the Velshi video.

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It's just working out.

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And yeah, the multicast is working.

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If I put now this on background and I go to the router, you can see here the packets alternate one

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on the receive on the internet, two on the seventh.

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So it's showing up over here.

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You can see it's increasing or we can go to the interface as well.

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And on the interface over here, we can see the traffic.

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If you want, you can call two inside Ethernet, one on the the X starts.

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We can see that this multicast on on Ethernet two on the desktops which you that's not.

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So very good.

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That is what I have by proxy.

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It's working now.

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Now, there are some more things that you can do on the IGP proxy.

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So I'm going to show you that in a moment.

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But number two is, Don, what arbitrary explain what is the function of the alternative subnets on

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the upstream interface and also its name?

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What is the function of the threshold on the upstream interface?

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So I'm going to do both points together.

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So what does it mean here if we go to the router and on the upstream interface, which is Ethernet one

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you have here, the alternative subnet, alternative sub net, what does it mean?

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That means that in case that the streaming server is not directly connected to that interface because

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that's the upstream, that means the traffic coming from the server, it goes that server is not directly

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connected to that interface.

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What you can do here, you can just put the IP of that server.

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Of course, your router should be able to reach to that server and the server should be able to reach

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to that router to be able to send the traffic of the month it.

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So all you need to do, you just put here the IP of the server and then the traffic will be coming from

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the server to the click rather.

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Now the threshold over here, it's what we call it.

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It details time to live by default at this one.

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That means what that means in case the receiver is just connected directly to the router, like in our

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case.

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Then you can just leave it wan because it can react to it.

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But in case there are more hops then you have to increase the time to live.

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Otherwise the multicast traffic will be dropped.

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It will not be reached to the receiver.

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So if you have like a two Roth associated authority just increased the threshold, put it like, I don't

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know, maybe you can just put it down for the safety.

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Then in this case you know that it will always be reached to the client.

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So those are the two things that I wanted to show you on the upstream, which are the alternative subnet

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and the threshold want have a three and four hour don.

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And the last point is all number five.

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Explain what is the quick interval, query response interval and quick leave on the settings.

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So what are those?

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So if we go to the example proxy and we should go to settings, we can see that we have quick current

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you will a response interval and quickly what are those.

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Let me expand one by one oriented, but we know that that is the membership query.

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That's something I have expanded and the beginning of this course that means that thereafter every few

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seconds or minutes it will send a membership query to see if the multicast her she will still need to

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receive the multicast from her.

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So we do it periodically.

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So here that is what the membership inquiry, which is called here quality interval.

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It is now by default, two minute, 5 seconds.

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So every 2 minutes, 5 seconds you sent the query and to to check if the receiver still want the multicast

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in case she doesn't hear from him for 10 seconds.

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It doesn't get any better reply back from the array which was call also the membership report.

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So he goes.

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She doesn't hear from him for concern that he believe that the multicast receiver doesn't want the multicast

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and he stops sending it to him.

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So that's what the quality response until now, quickly that's very, very important.

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And by default you you better leave it unchecked.

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And I would tell you why.

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If you chuck this quickly, quickly, it means that in case the host doesn't want the the multicast,

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then he will send information to the rather than the router or would say, okay, he doesn't want it,

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then he will stop sending the multicast.

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Now in case you have one computer, like in our case, that's not a problem.

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You can check that quickly because it is connected only to one computer, but say that you are connected

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to a big network and in that network there are like ten users or ten machines that want the multicast

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in case you check the quickly for like what you are doing now Dan be careful if one of the machines.

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A quick leave to the the of shame that I don't want them off the gas.

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They'd rather we stop shedding them off the gas.

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But not only too that he will stop sending the multicast out of his interface that meets all other hosts,

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like nine other hosts who want the mounted gas will not receive anymore the amount costs.

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So again, when you check the quick leave if you have ten machine is one thing the multicast one of

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them said a quickly if say I don't want the multicast anymore than if we have the quick leave checked

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like we have now that the router will stop sending the multicast traffic not only for that machine but

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for all other machines because it will stop sending it from its interface completely.

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So that's why when you have a big network with many machines, always you can either to leave the quick

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leave unchecked.

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That's what also migrated crookham at.

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Now in our case, because we have only one machine, we can make the quick leave.

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That's not a problem.

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But normally we should not play with that.

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So if you want to, we can read that because I put that on the written here.

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Let's read the those three things, the quality of what we said.

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That is the time to let the router knows how often he should send out the IGP query, which is the membership

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query messages over the downstream at the faces to check of the host or whatever.

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If that is an output or whatever it is to stall the still want the multicast.

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The responsibility of our query repository for after the query message has been assigned.

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The query response retrieval is the time that the router should wait for responses to his career message.

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Otherwise, he will know that the device is not interested in the multicast streaming anymore.

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So that's something we already know.

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This is the quickly if there is a checkbox that you can use it.

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In case the quickly check the IRP live message is sent to the upstream interface as soon as the leave

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is received from the first client on the downstream.

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So that means what if you go to the picture?

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Let me just put the picture here.

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So once this guy doesn't want the multicast, he was not aware of corrective check.

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He was sent to the downstream, which is this interface.

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This will inform the upstream interface that he doesn't want anymore, the traffic.

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So let's continue to see what's going to happen.

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And then and in another meaning, if you have ten just receiving the multicast traffic and all are connected

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to it in a two hour on the rail.

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So that is on thereafter in case one host does not need the multicast stream adequately is checked or

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one host doesn't want it.

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And to quickly gives check on the router, then this host will inform the dash interface you to too,

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which in turn will inform the upstream interface which is Ethernet one.

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And guess what?

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The Upstream interface will not said the multicast stream down to Ethernet two anymore, which lead

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that the all nine host or other host will not be able to receive the multicast stream anymore.

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That's why my critic recommends that you don't check quickly unless you have only one user as multicast

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receiver.

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So exactly what I have expected you in the expression port number five is done.

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And with this point I have finished the lot before I just finish it completely.

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I just want to show you, because that is one more thing that that we can see here, which is the AFC.

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So this we have to think of the slacker optic table for the multicast.

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So let's see if you can see that the multicast is still running on the background over here.

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And what does this do?

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So this, for example, I often hear announcers saying that the group, which is to Schneider, Wanda

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to the street is coming from one or two.

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I say .1.2, which is the streaming server.

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And here we can say that is the upstream interface, that is the downstream interface that is automatically

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dynamically created.

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If you want to make it that, you can just make copy and you can create one static to apply.

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So that's also possible that you can do it.

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So by now we have already covered the whole IGP proxy.

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So remember I am pre proxy is like pen.

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So in case you have many routers, you can use Azure bureaucracy.

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But be careful, do not use it on a big network.

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If you have a small network you can just run IGP proxy.

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You can see it's very easy.

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As you have seen, not very difficult to be configured and the multicast would work without any problem.

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And also, I have expect to use some more features that are available on the IGP proxy.

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So where and how you can use them, especially the quick leave.

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So be careful.

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Do not check the quickly when you have many receivers for multicast because you have only one receiver

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just fine.

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But when you have many inside the one network, so be careful to not use too quickly.

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So for now we have covered everything about IGP.

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I spoke about you have people you want to go to an agent by proxy.

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Now in the upcoming section we have to start speaking about the pen.

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So where we have to speak about them to see how it works and what are the information behind them.

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And we are going to make multicast putting to routers.

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So we have the streaming server, we have the streaming receiver, and that is between in between those

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server and receiver to routers, microcontrollers to able to configure PIM to see how PIM works.

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So I hope that this lecture was informative for you and also unit accommodation.