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CCNP ENARSI (300-410) : MANIPULATING ROUTING UPDATES

1. 4_1 How To Use Multiple Routing Protocols

In this section, we're going to talk about how to use multiple routing protocols. Basic routing protocols work well for simple networks, but when networks grow and become more complex, you may need to change the routing protocols. We can need multiple routing protocols for these scenarios. For example, when merging to a new IGP such as OSPF version three from an old IGP such as Rip, And secondly, let's say that a company that you worked for has purchased another company, and let's say that your company is working with OSPF and the purchased company is working with EIGRP, then you need to use multiple routing protocols with each other. And lastly, for example, if a new network protocolis to be applied to the network, but somesystems can still need to work with the oldprotocol and in these three scenarios we can needto use multiple routing protocols. Administrative distance is a value used to determine which of several pads in a routing table belong together. A subnet should be trusted. A low administrative distance value indicates a high confidence level and indicates that this path should be used. For example, if we have two options to reach the same network For example, let's say that 1041 is learned via OSPs and EIGRP and that we always look for the longest match on the subnet mask, as you know. And if the subnet mask's perfect length is the same, we check the administrative distance this time. For example, if I learned disrupt from OSPF and EIGRP,the administrative distance of OSPF is 110 and EIGRP hasan admin is to receive distance of 90 and whichshows that I'm going to use EIGRP instead of OSPF.

2. 4_2 Route Redistribution

In our next section, we are going to talk about rod redistribution. What Rod redistribution does is allow different network protocols to work together. For example. So in this figure, as you can see, we haveBGP, we have EIGRP, we have OSPF, and if youwant to communication, if you want to communicate to thesedifferent routing protocols, you need to use redistribution normally. Without redistribution, the EIGRP and OSPF domains in this example can't communicate with each other. To communicate these two routing domains to each other, we need to add redistribution definitions to the OSPF and EIGRP configurations. Redistribution is always done outbound, so the redistribution router does not change its own routing table. Routers that only receive redistributed rods add these rods to their routing tables, and that's it. When performing a redistributed operation, the redistributed protocol must have an appropriate metric value for the receiving protocol. During redistribution configuration, the seed metric value can be specified. Otherwise, the default values of the seed metrics are used, and they are infinity for ripen EIGRP in OSPF. All except PGP, which is 10 for Isas, and PGP metrics are set to IGP metric value.And here is how we can configure mutual redistribution between AIGRP and OSPF. Let's talk about our figure. In our figure, we have an OSPF domain and we have an EIGRP domain. As you can see on router three, we need to configure redistribution to provide communication between the OSPF domain and the EIGRP domain. To configure a redistribution from EIGRP to OSPFon this site, what we're going to configureis rather OSPF and OSPF process number. We get into the configuration router mode, then we type redistribute EIGRP and Eigrp's number, and we default to finding the metric, and we can use the subnets command as well. If we don't use the subnets command, we cannot redistribute the classless route. Okay, then what we're going to do is reverse the direction from OSPF to EIGRP. We get into the configuration router mode by typing router EIGRP and the AS number. Then we type "redistribute OSPF one" and define a metric value first. That's the one for this. After, we need to define an add-delay value. Then we need to define the reliability loading and the empty values as well. And the end result will be something like that: a redistributed OSPF metric value, delay reliability load, and MTU value. Let's see how we can verify the redistribution configuration. Show IP route is the simplest command to use to verify it. When we type "Show IP route," we see some OSPF routes. As you can see here, this is the route learned from the OSPF domain. The CMD routes are the cables directly connected to the router. And here we have O and E number two. Next to it, we can see E-1 as well. Two. I'm going to define the difference between E one and E two, but these routes are the distributed routes into the SPF domain. And here is the EIGRP site from router five. this guy's point of view. We have connected routes and the D routes, which we learned from the EIGRP domain, and we have DX routes. They are also the Ten Network. and ten networks belong to the OSPF domain. And these routes are the routes learned from the OSPF domain. They are also represented as D with X. X means EIGRP external, as you can see. All right. Pretty cool. OSPF external routes are advertised in two types and increase their metrics. does not increase their metric. Okay metric. After e, two routes are fixed, but one route increases its octane.

3. LAB - Basic Redistribution Config

Alright guys, that's lab time again. We have a basic redistribution lab for you that we are going to accomplish in four steps. In the first step, we need to configure your EIGRP and OSPF with no summarization for the network above. Okay? Then, accurate full mutual redistribution between OSPF and EIGRP networks is required. All routers must see all routes on the routing tables and implement all metrics. Pay attention to the fact that OSPF external routes should not increase their metrics. Okay? Then we must implement a distribute list filter so that only the odd blue pack is seen on the OSPF domain rather than the other. All EVEN subnets, including physical networks, should not be seen from the OSPF domain site. In the last step is saying us thatimplement rot map builder so that just 24rods are seen at the EIGRP domain. Oh, right. What we're going to do in here is configure basic EIGRP and basic OSPF configurations on rather 1, 2, and 3. Then I'm going to configure redistribution on router 2 to provide communication between EIGRP and OSPF, and OSPF to EIGRP as well. Then I'm going to implement a wrap filter so that just 24 routes are seen at the EIGRP domain. Just 24 days, and I'm not going to want this. All right, what I'm going to do here first, guys, is configure the basic EIGRP and OSP for the routers in my topology. Okay, I'll start with Rodger 1, which is in the Eigrpa 105 and 6. All right, I finished this. I'm switching to Router 3. This is on the OSPF site. I'm going to use Area Zero, I think. Let me check. Yes. SPF 1 router and Netflix network blanc series 0. All right then, network, which one begins with the slash 30? All right. Area zero and network include eleven networks, area zero, nine, and ten. Let me check. We are using a different subnet for this, which is 30. So I'm going to use this WorldCamp 3 mask, WildCamp mask 40. All right, the array is zero, four, and eight. Okay, let's go. Display the IP interface breath. Let's go. SPF one network and router, network area zero All right, I finished the basic configuration in here. All OSPF and EIGRP configurations are made, as you can see. And the first step has been completed. But I need to use "no auto" on the EIGRP site as well. All right, let's do it. I already configured this guy, and I'm going to configure this guy rather than ERP 100 and no other. All right, the first step is finished. Let's go with the second one. Act on full material redistribution between OSPF and EIGRP networks. Cool. All routers must see all routes on the routing tables and implement all metrics. Pay attention to the fact that OSPF external routes should not increase their metrics. All right, what I'm going to do is I'm going to configure a mutual redistribution between OSPF and EIGRP domains. So let's do it. I'm on another two SPFs and one redistributed EIGRP. What the hell is going on? I'm sorry. 100 with a metric type of two. Because the question is saying to me that the external OSPF route should not increase data metrics. Right? Okay, if I just configure like this, only the classful networks will be redistributed. So I need to use subnet keywords to redistribute to class-less networks as well. All right, the correct solution is to redistribute Aigo100 subnets with a metric type of two. Okay, now I'm going to configure redistribution from OSP to redistribute the SPF one metric. Okay, delay loading. I just configured the registration accurately, so I need to check the step to see if there's something more to do or not. Activate. Okay, all routers must see all arrows on the routing table. I'm going to check on this guy. If I'm seeing all these routes on rodger three and rather one,I need to see these guys on rodger three and I needto see all of these guys on the radar one site. All right, let's go and type some showIP routes for another showIP route. Okay, pretty cool. I'm seeing the external networks. These individuals are from the OSPF. Good, then check here if I'm going to see the Etude routes or not. I'm receiving them as well. Here they are. Okay, we configured it properly, and that's our proof. And let's go ahead with the third step. The third step saying assetimplement, distribute list filter. So there you have it, the old loops of rather one. This guy's old bluepeck is seen on our SPF domain. All event subnets should not be seen from the SPF site. Alright, what I'm going to configure in here is I'm going to configure access lists, and I'm going to hit the old blue packs. Then I'm going to implement that distributed list. Okay, let's go. I'm a one-permed ten, 110-0255, three, and five-access list. Okay, I hit them; instead, we SPF one distribute list one out. Let's see what's going on. Implement the distribution list. So that's just the old loopbacks of the router. One is seen on an OSPF domain. Let's look at it from the router's three IP routes. And, as you can see, I only saw the option to disable the show IProute before implementing this little bit less. I finished this guy too. And we have just one more step to accomplish. I'm going to implement an arrangement filter. So that's just the slash. 24 routes are seen at the EIGRP domain. So what I'm going to do here is define a perfect list. This time I'm on number three. And I'm going to define an IP prefix list—which is the name of a network here, let's say. And I'm going to permit eight less than or equal to A. Then I'm going to create a rot map, rotmap filter, matchip address, prefix list, and network, or rather, redistribute OSPF by a factor of 100. one metric with a route map filter. OS is fine, guys.

4. LAB -Advanced Redistribution Configuration

Alright guys, in this section we are going to take a look at the advanced redistribution configuration. Together. We have three steps this time. In the first step, we need to configure AIGRP and OSPF for the network above and advertise all the networks' forevery routers, and we are not going to use summarization. Okay, then implement full Moon Tool redistribution between OSPF and Ein 2, or rather, 3. Okay, 24 1324 must have as symmetric ten, 20 and 30. Master received metric of 200 and OSPF tag 20. And all other subnets that Edward ties to the OSPF domain must have a seed metric of 300 and an OSPF tag of 30. Also, OSPF routes advertised to the IJRP domain must have a 400-ms delay, 2050 Wi-Fi reliability load, and 150 MTU with a tag for the okay, and then external routes should not increase their metrics, which means I'm going to use E two.Okay, in the last step it's saying after tenfour 40 network should not reach to OSPF domain. All right guys, I'm going to start with the first step. But in this question, what I configure on "rather two" will be configured on "rather three" as well. So to save time, I'm just going to configure that instead. Okay, then let's start with the first step. Configure OSP for the network EBO and advertise that all the networks don't use summarization. All right, I'm going to configure the routers just for the basic EIGRP and OSPF configurations. Redistribution configurations will be made on router 2, but the same configuration should be made for router 3 as well, as I said before. All right, let's go ahead with the router one. This guy is in an OSPF domain that has one loop, and another one has just one loop back. All right, let's define a router ID first. belongs to series zero. Oh, I misconfigured this guy. This is EIGRP domain. All right, router one is in EIGRP, guys. Okay, no router SPF. All right then, router four. This guy is in EIGR, and I'm going to configure network statements 00:10 40012, three, and 14 for router ID network area zero. And what about three and two? They belong to OSPF. Then I'm going to the EIGRP site. Noado network. Okay, then let's go to the three network. Router ID first. Router ID guys rotary iGRP 100 and network array zero I finished my basic configurations, and what I'm going to do in the second step is implement a full mutual redistribution on the other two and implement these tags and metrics and the other values. As you can see, our question All right, I'm going to router 2 first, and I'm going to create some access lists to hit the IP addresses that are shown for the question permit. These two networks are belonging to thesame access list, access list one becausethe question is saying ask that. Do the same thing for these guys. So I'm just going to use one access list and hit both IP addresses twice. Okay? And lastly, permit to okay, this guy would be denied. I think in the question it was saying, "Okay, now what I'm going to do is define a route map rot map from AI JRP." Throughout, we are coming from EIGRP and going to the OSP for the map. Okay? Permit. Now I'm going to match the IP addresses and set the metrics and the tech values. Match this guy's IP address with this guy's IP address. Okay? Set metric to 100 and tech to ten. Okay, I'm going ahead to my routing statement with the second step permit, 22nd sequence, match IP address two. I'm defining this rule for this guy. All right? I'm going to go ahead with my second 30, but this time I'm going to use a deny statement because I'm going to hit the IP address of the network, which is going to be denied, all right? And match the IP address three times this time. Okay, I'm going to deny this guy. Then I'm going to use the last permit statement, 40, and I'm going to set the metric to 300 and set the text. Please pay attention to the fact that I didn't use a match statement for the last roadmap, which means I'm hitting IP addresses that I didn't define with my access list, which means all the routes and rest of the networks that I hit via this access list are because I didn't use a match statement. All right? Now, router SPF 1 should redistribute EIGRP using a rapid app EIGRP. That's what I really want to do. So this guy is okay, and this guy is also okay. But Porsche, look, I think I didn't configure this site, but that is okay, too. Number three: I denied reach to the OSPF domain. But guys, I'm seeing a conflict in this question. Ten four four belongs to the other four, and you're telling me that this network should not reach the OSPF routing domain, but it's already in OSPF. I think there should be EIGRP. What I need to do is define the other redistribution statement that says the advertised EIGRP domain must have these values, okay? And they're not going to increase the amount as well. Okay, I'm going to configure rot map, rot map, rot map, OSPF two, EIGRPset metric 400, and I set metric to 400 and the other guys to 22 55, $1,500, and redistribute OSPF one. Oh, no, I'm going to set the metric type as well. Route memory, set metric type to 2, and then instead EIGRP 100 redistribute OSPF 1 on the rods map. That's what I really wanted to do. Guys, there was a really great session, and we learned a lot of things about how to configure and advance redistribution. The trick is, as you can see, just to create access lists and match the IP addresses by using the access list in the roadmap. Then you can set the tag values, and you can set the metric in the rotmap by using the statements. That's pretty straightforward. Then what you do is define the distribution according to the map that you've created. Okay. That's pretty cool. That's pretty straightforward. And that was a really cool session. And thanks for viewing.

5. 4_3 Controlling Routing Update Traffic

In this section, we are going to talk about how to control routing update traffic. Sometimes it may be necessary for some routes to be allowed to reach some destinations correctly and some to be rejected. Rod filtering methods are just used for this. For example, I have a bunch of rats here. They are 16, 17, 18, and 19. If I don't want to see the 16 network, for example, I need to filter this route, and that's why we're using route filtering. We have three methods that we're using: filtering the routes, their distributionlist prefix list, and the route map. A distribute list is used to filter routing updates. using access list prefix list also does routeupdate filtering using ACL, typically used to filterout a specific prefix with an IP address. For example, you can use the perfect List command to filter only this network's withdistribution list, but you can also filter the specific subnetmask. And the last thing is a wrap map. We are going to focus on wrap A map is a complex access list that allows conditions to be tested against a packet or route and then an action taken to modify the attributes of the package or route. Let's try to filter the loop-back interface of router 1 from the routing table of rather 3. Here's how we can configure this on router three. When we type S distribute list. Then we define a distribute list name which is rone L zero and we implement this report list toinbound what this distribute list is doing we define anaccess list and please pay attention that that's the nameof the distributed list and what this access list isdoing is denying the host 1111. All right, then, when we type the show IProd for one month on the router tree, we can see that the network is not in our table. If you want to summarize, we define an access listactually then deny the host one one one in this. Then we put the same name in our distribute list and do the same for inbound. So, even if router one advertises to router tree, it's blocked, filtered, and here's how we can configure the app Perfects List. Here we are configuring rather a tree and are defining an IP Perfects list, and the name of the Perfects list is filter routes. We can define it as "description" or not; that's arbitrary. Then we use IP prefix list filterroutes with a sequence number of 5, which permits ten 1011 00:24 routes. Secondly, our IP prefix list, which is named with filter routes, is allowing ten 10120 routes. Okay, now we're in router configuration mode, typing the redistribute EIGRP and Eigrpa numbers with metric 40 subnets. That's the redistribution command, as you know, doing nothing more than redistributing graphs from EIGRP to OSPF. Then, lastly, we are defining a "perfect" list. The command is beginning again with the word "DistributeList," but continuing with the "Perfect" command, "DistributeList Perfect," and my "Perfect List" name. As you can see, we are defining this outbound to the EIGRP 100. All right, what we are doing with this perfect configuration is we are permitting this guy and this guy to be redistributed to the SPF domain, these two things. But we are filtering this route to be redistributed from an EIGRP domain to OSPF in the Perfect List comments. You can see something like that too. LE or GE? You can see these guys at the end of the comments. These are sometimes less than or equal to this guy, and this guy means greater than or equal to these. For example, if I type this command on a rather old router in configuration mode IP, which is the name of net, it must be both the network range and the perfect rule for the route to be allowed. For example, if I want to match a subnet for the statement, I need to match the subnet mask and the perfect list. For example, whether ten 50, 00:16 is permitted or not. That's going to be permitted because I'm hitting the range. I'm in the range for 100, zero, and eight, and my subnet mask is also less than or equal to $24. But if I were to say that if I were to use this route, it would be filtered with route maps. Route maps are a filtering technique in which the IP addresses associated with the Match commands are identified and the actions to be taken with the Set commands are specified. We can use Rob maps for different operations such as redistribution, BJP, neighbour manipulations, or policy-based routing as well. And here is how we can configure the route map. First, the route map is defined in global mode. Then the IP addresses for the match commands are selected, and Set commands are used to determine the action to be taken. For example, in this scenario, we have a BGP configuration. Then, in this route map, we define the route map. And the name of the route map is Localpref and Permit 10. That's the sequence number of the Rot map. Then we are matching the IP address 65 in this rockmap, which hits this IP address and subnetmass range. Then for this IP address and subnets range, we are setting the local preference to 400. Then, lastly, we are manipulating our BJP neighbour by using the Neighbor 28 one-rod map, localproof Rot map's name, and we are implementing this route map for inbound. All right, I know that that's okay. We don't know anything about BGP. But I just wanted to show you in a scenario how we use Roadmap, and we are going to see in the next few steps how we go deeper into Rot Map. So you don't need to worry about anything. In the first step, we define a route map called redis Rip, matching the IP addresses with disguise, setting the metric to 500, and setting the metric type 2 type 1, which means e 1 for this IP address range. Then we have a Denise statement in here, and we're matching the IP address with Evan, which is this network, and we're denying these guys the right to be redistributed from it. And lastly, we have a sequence number of 30. As you can see, we don't match anything, which means that the rest of the IP addresses rank lower than these. We are setting the metric to 5000 and the metric type to E2 this time. All right, I am summarising this. We are summarising from Rip to OSPF, and these two IP address ranges will have a metric of 500 and we'll have a metric type of even, and we are denying these guys the right to be redistributed. When I can redistribute this, then any other routes will have a metric of 5000 and we'll have a metric type of e two.And at the end of the redistribution command, we are using redistributrip with the rod map and name of our rad map, and we have route tagging. Route tagging is used to prevent routes redistributed from protocol X to protocol Y from being redistributed again to protocol X. We can block some text to prevent the loop, and here is an example of redistribution and route tagging in which we are defining a rot map with the name EIGRP to SPF and permitting with the seconds number 50. Okay, then we're redistributing these rods and using the rodmap and our rot map name, and then we have another ratmabin here, OSPF two EIGRP this time, which is denying that we're matching the Tech 50 routes and denying them and permitting anything. Then we use the Rob map in conjunction with the command.

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