Top 5 hardest topics on the ccnp route exam and how to. Special ospf areas describes how ospf design uses stub, totally stubby, and notsostubby areas to optimize resource utilization. One of the golden rules of ospf is that all areas must be connected to the backbone area 0, however sometimes this is not physically possible, and this is where virtual links come in. Router 1 should be a asbr which redistributes the static routes. Single area ospf configuration part2 best cisco ccna. I fail miserably, leave it and focus on my university exams until the new ccnp to try again. R1 will act as an asbr by redistributing a series of static routes into theospf network. The action takes place in a multiarea ospf environment, connected to an. In this article, we are going to learn how to troubleshoot and resolve ospf routing. When a link state router begins operating on a network link, information associated with that logical network is added to its local link state database lsdb. There are a few things that have been left out, like virtuallinks and ipv6, which will be touched in different smaller labs.
All ospf routers participate in multicast group 224. In this article we will see how to configure ospf step by step. Ospf will form neighbor relationships with adjacent routers in the same area. These lessons will teach you everything, we start with the basics and work our way through the.
The local fish trading market needs your help with their ospf network. You will also you will learn to configure ospf on a multiaccess network. In some situations, it is necessary to continue sending hellos to inactive. This can be done with the clear ip ospf process command. Implementing ospf for ccnp routing and switching 300101.
If youre looking for a free download links of ccnp routing and switching route 300101 official cert guide pdf, epub, docx and torrent then this site is not for you. Ospf open shortest path first ospf is a standardized linkstate routing protocol, designed to scale efficiently to support larger networks. Network diagram objectives configure ospf for the above network diagram. Study plan cisco ccnp routingswitching 300101 route. As mentioned earlier, it is a good security practice to enable ospf authentication to thwart off attacks that attempt to inject potentially malicious routes into your routing table. It seems their routers are unable to change the bandwidth or cost on the interfaces so you need to use another solution to influence ospf routingsounds fishy. The ccnp route course covers the most important topics of the ccnp route 642902 certification exam in a very detailed fashion. If a router configured for ospf routing is not seeing an ospf neighbor on an attached network, do the following. If youre looking for a free download links of how to master ccnp route pdf, epub, docx and torrent then this site is not for you. This topology includes multiarea ospf with area 0 as the hq backbone for the enterprise network and other ospf areas or ripeigrp domains acting like remote branches. Lab setup for eigrp, ospf, path control the above diagram will be used for studying all eigrp, ospf and path control concepts in the ccnp route 642902 curriculum. Routers will exchange pieces of information called lsas link state advertisement in order to build a complete topology database which we call the lsdb link state database. The lab consist of four separate labs each lab building on the previous ospf topology covering topic such as ospf backbone area, stubby, nssa not so stubby area, and totally stubby areas, virtual link areas, ospf over framerelay, and redistribution of external network into an ospf area.
Learn how to configure the ospf dynamic routing protocol from starttofinish for both ipv4 and ipv6. The majority of the network setups use this protocol nowadays in favor of rip and sometimes eigrp due to it being a linkstate and open standard protocol. Ospf is a widely used protocol in campus, data center and even in service provider environments. In this free ccna lab you will learn to configure ospf in multiple areas. Cisco ccnp 300101 ospf basics so its that time again for me to renew my cisco certifications. These options are listed in the following output, followed by a discussion of a few of the key ones. Troubleshooting your open shortest path first ospf routing protocol is eased by the show ip ospf command which provides information specifically addressed to this protocol. Home downloads download cisco ccnp routing pdf study guide. Priority may be adjusted from the default value of 1. The new ccna and ccnp exam is based on the latest cisco ios revision 15.
At the same time, the abr chooses to not advertise external routes 5 lsas into the area, or even instead to no longer advertise interarea routes in type 3 lsas into the area totally stubnssa. In ciscos implementation ospf will choose a loopback interface with the highest ip configured as routerid, if no loopback is available it will pick the highest ip of normal interfaces. This is a lab created to cover most of the ospf concepts that one needs to know for the bsci certification. For more information about ospf lsa types please read our ospf lsa types lab tutorial. Ccnproute multiarea ospf with stub areas and authentication. Download ccnp routing and switching route 300101 official. The hello and dead timers can be changed with the ip ospf hellointerval seconds and ip ospf deadinterval seconds interface configuration. Configure ospf to summarize these redistributed routes into a single route.
Ospf nssa not so stubby area ospf md5 authentication rotating key. You will also learn to use the ospf election process to determine the designated router dr, backup designated router bdr, and drother. In our example, we will examine the figure below deeply. Make sure that both neighbors are part of the same area and area type. Ospf was developed to combat the limitation of rip. When getting ready to tackle the cisco certified network professional ccnp certification, there are a number of different technologies that you must be familiar with. R3 advertises lsa type 1 to r4 then r4 converts it into type 3 and sends to r5 because r4 is the abr so we see the link id 3. Kinda took the first exam to see if i was ready for the ccnp, i wanted either of the first 2 of 3 possible outcomes to happen. Ospf operation every ospf router sends out hello packets hello packets used to determine if neighbor is up hello packets are small easy to process packets hello packets are sent periodically usually short interval 9. The routing table of r1 is now learned routes to networks 172. In this quiz for people working towards becoming a cisco certified network professional, well be turning our attention the topic of the open shortest path first protocol a routing protocol for ip networks which uses a link state routing algorithm. It allows the discovery of all ospf network devices in the network, without connecting to each of them or knowing all their ip addresses. It also describes a few basic ospf show and debug commands. The ospf network command uses a combination of networkaddress and wildcardmask.
Ospf adheres to the following link state characteristics. The user must provide the ip and snmp community string of a single ospf device in the network for example, a device in the core and the script searches for all other ospf routers. Many options are available for the show ip ospf command. With its fast convergence and scalability, ospf is well suited for multivendor. Configuring mutual ospf and rip redistribution free ccna. Ccnp routing and switching portable command guide scott empson, patrick gargano, hans roth. Ospf is a link state routing protocol that has these following characteristics. Make sure that both routers are configured with the same ip mask, mtu, interface hello timer, ospf hello interval, and ospf dead interval. Ospf areas dividing an ospf network into areas decreases the lsdb size and limits the propagation of linkstate updates when the topology changes. It is time to take a look to configuring ospf open shortest path first with an ospf configuration example. New ccna routing and switching 200125 ccna security and ccna voice best ever ccnp route300101 and 642902 and switch and also best rhcerhcsa linux notes for rhel6 and rhel 7 and also ubuntu and pfsense firewall pdf notes. Ccnp route study ospf authentication notthenetwork.
Redistribute these static routes into the ospf process. If you change the ospf router id, we need to either reload the ios or use clear ip ospf process command restart the ospf process for changed rid to take effect. We cover lsa types, areas, timers, route redistribution, authentication, and route summarization. If not then to summarize it all up for you in a pretty little nut shell. Before i i start, i want to tell you that i made a gns3 topology for you, which is configured with ip addresses and hostname so you can get the gns3 file from the download link posted here and start with described configuration in this article. To verify this, the show ip ospf interface command will show us that md5 authentication is enabled and.
With this training course, you are not simply going to be able to pass the exam, but also get a higher level of knowledge than required by cisco to award you the ccnp certification credentials. If the ip ospf priority command on the neighbor is set, then the higher value of the two is used. Cisco ccnp route ospf authentication types opsf supports both simple password and md5 authentication. Free ccnp gns3 lab ospf in a single area posted by barry on november 26th, 2012 you are responsible for configuring the new network to connect your companys engineering, marketing, and accounting departments, represented by the loopback interfaces on each of the three routers. Ospf open shortest path first is a popular linkstate routing protocol. Lab 102 configuring mutual ospf and rip redistribution, then you should have a basic understanding of mutual route redistribution.
Of these topics, a number of them are tested as part of the cisco route 642902 exam the purpose of this article is to give you some direction when studying some of the hardest topics tested on the ccnp route exam. The default ospf hello and dead intervals on pointtopoint links are 10 seconds and 40 seconds, respectively. So up until this point youve learnt how to configure different routing protocols such as the routing information protocol rip, enhanced interior gateway routing protocol eigrp and open shortest path first ospf but now its time to learn how to make this protocols play nice with each other and share their routes between each other. These routes should not increment their metric as they pass through the network and should have an initial ospf cost of 200. The routers that are to be abrs and asbrs must be identified, as are those that are to perform any summarization or redistribution. Configuring ospf authentication describes the crucial topic of configuring specialized ospf area types and md5 authentication for ospf. Ccnproute ospf virtual links and area summarization. You will configure ospf over a framerelay wan as well as over two other framerelay connections. The cisco 2800 series router is the most affordable model that supports the necessary ios.
Section 12 ospf section isis section 14 bgp part iv advanced routing functions section 15 route redistribution section 16 access control lists section 17 route filtering and routemaps section 18 multicast. Use the neighbor command to configure interconnecting ospf routers within a nonbroadcast environment. A virtual link is created through another area that is connected to area 0. Ccnp routing and switching portable command guide, 2e. If routerid has changed, a restart of the ospf process is necessary. Ospf router id should not be changed after the ospf process is started and the ospf neighborships are established. Link state routing protocols advertise the state of their links. Ospf question and answers ccnp ccna,ccnp,ccie blogs.
We can see two o e1 routes that are being redistributed into ospf. Configuring ospf routing advanced lab continued ospf objectives. Open shortest path first open shortest path first ospf is an openstandard link state routing protocol. Chapter 3 implementing a scalable multiarea network ospf based solution 41. Once you are in the router ospf configuration submode, configure the lan network 172. Prepare the ccna and ccnp exams with our cisco packet tracer tutorials. These labs are dedicated to understanding and configuring ospf. Are you preparing for cisco certification exam and need lab equipment. Ospf employs a hierarchical network design using areas. Check your routing tables to ensure these routes have propagated. Abrs in stub areas advertise a default route into the stub area. As well as basic routing with rip, ospf, and eigrp, to the extent required by the.
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