Ospf is a routing protocol used in wan or business networks. Examples the following example assigns a defaultcost of 20 to stub network 10. Example cisco asr 9000 series aggregation services router routing configuration. In this tutorial well learn about the basics of open shortest path first ospf in short protocol configuration in cisco s 2811 series router using cisco packet tracer. A priority of 0 will prevent the router from being elected dr or bdr. Ospf can be used for serviceside routing, to provide reachability to networks at the local site, and it can be used for transportside routing, to enable communication between the vedge router and other viptela devices when the router is not directly. It allows the discovery of all ospf network devices in the network, without connecting to each of them or knowing all their ip addresses. Mpls configuration step by step cisco mpls tutorial.
Create separate ospf templates for the two ospf routing types. Understanding basic open shortest path first ospf routing principles not only applies to the ccnp certification but to all cisco based certifications. Home ccie mpls mpls configuration tutorial step by step. How to configure ospf in gns3 ospf routing configuration. We talked about ospf basics and made an ospf configuration for beginners on our course. If you want to put this into gns3, eveng, or your lab of choice, you can download the individual router configs from here. Beside this, i will add some additional cofiguration steps that is needed for ibgp but we can not.
Create an ospf feature template to configure ospf parameters, as described in this article. 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. This routing protocol maps the entire network using the spf algorithm and provides a fast convergence as a result of a failure on a router on the network. Routing configuration example viptela documentation. To get the certification and your own ccie number, you need to pass a written and lab exam. This article is about the ospf configuration in packet tracer. Ospf with multiarea adjacency configuration example cisco. For basic ospf configuration, the followin scenario will be a good example. In the following example, an open shortest path first ospf stub network is configured to include ospf area 0 and ospf area 1, using five devices. For example, here is the output of the command on r1.
Understanding the routing updates processs using enhanced interior gateway routing. A concrete understanding of how ospf routing works is fundamental for any small or large network. Above we have r1 and r2 in area 0, the backbone area. To configure a netowork for ospf properly there are some steps.
Ccna lab manual router infotech, confidential document only for internal circulation page 2. Cisco ospf configuration commands for checking adjacency, dr bdr election and stub area. Ospf configuration s1720, s2700, s5700, and s6720 v200r011c10 configuration guide ip unicast routing huawei. This blog entails my own thoughts and ideas, which may not. Configure ospf area parameters p1c112 network protocols configuration guide, part 1 on any pointtomultipoint interf ace broadcast or not, the cisco io. Configure ospf on the switches, ensuring that switch s, switch a, and switch d can communicate with each other at layer 3.
This branch network is running ospf, and ospf automatically redistributes its learned intraarea and interarea routes to the vsmart controller. How to configure basic ospf by brandon carroll in networking on july 26, 2017, 12. Simply use that sample configuration for creating your own configuration. O ospf, ia ospf inter area n1 ospf nssa external type 1, n2 ospf nssa external type 2 e1 ospf. Ip address configured with the ospf routerid command. Example vpn backbone and sham link configured for ospf version 2. Example virtual link configured with md5 authentication for ospf version 2. I will give you some basic overview about ospf and then will provide the details of these configuration by practically configuring a lab. To understand bgp border gateway protocol better, we will make a basic packet tracer bgp configuration example. Learn ospf configuration commands, ospf show commands, ospf network configuration process id, network id, wild card mask and area number and ospf routing in detail.
Ospf commands use the commands in this chapter to configure and monitor the open shortest path first ospf routing protocol. If you studied cisco s ccna you have learned that when you use ospf all the areas have to be directly connected to the backbone area. Configure ospf in two routers and check adjacency state, routing table and lsdb. A number of different cisco ios ospf configuration commands are available, but at its most basic, ospf configuration uses three commands. In this article we will see how to configure ospf step by step. We provide technical tutorials and configuration examples about tcpip networks with focus on cisco products and technologies. For ospf configuration information and ex amples, refer to the con figuring ospf chapter of the network protocols configuration. Ospf can be used for serviceside routing, to provide reachability to networks at the local site, and it can be used for transportside routing, to enable communication between the vedge router and other viptela devices when the router is not directly connected to the wan cloud. This chapter describes the implementation and application scenarios for ospf, as well as how to configure and troubleshoot ospf. How to configure ospf routing on cisco router with packet tracer. Cisco recommends that you have knowledge of these topics. If you are looking for an mpls tutorial or step by step mpls configuration examples, this basic mpls vpn configuration example will guide you from configuring the first router to a 3 router mpls core with 2 external sites if are you looking for an explanation of mpls then i would advise you read the what is mpls post first. Home downloads download cisco ccnp routing pdf study guide.
If a hello packet is not received in four times the hello interval, or 120. This time, well take a look how you can configure multi area ospf. With the basic overview of ospf configuration you can learn, how to configuration ospf on any cisco device this will provide you the basic. For example, if you want to find a quick configuration for ospf summarization you would go to o then ospf and find that specific topic of your choice. To configure ospf on a router, there are two steps. Page 20 virtual link configured through area 1 for ospfv3.
The router ospf processid command is the beginning of any cisco ios ospf configuration. Redistribution between cisco eigrp into ospf and vice versa example. In my introduction on ospf i explained why we sometimes use multiple areas for ospf and in our configuration example, i showed you how to configure ospf for a single area. It is time to take a look to configuring ospf open shortest path first with an ospf configuration example. In this article we will make an example for advanced ospf configuration. Hi this mohd salmans tutorial video about ospf routing protocol cisco ospf protocol. Areas have to be connected to the backbone area but if they arent we can fix it with a virtual link. Redistribution between cisco eigrp into ospf and vice. Open shortest path first ospf is an openstandard link state routing protocol. In cisco ios software, ospf enabled routers send hello packets every 30 seconds on nonbroadcast network types. How to configure opsf in gns3 open shortest path first protocol. Ospf open shortest path first protocol is a wellknow routing protocol that is widely used today. This is a bgp configuration example lab showing bgp configuration using cisco packet tracer. We also want to advertise ospf external routes to the vsmart controller.
This document describes how to configure the open shortest path first ospf link state routing protocol for multiarea adjacency. The following lessons are useful especially for the lab exam. With this reference guide you can view a sample network picture along with the sample configuration. I will show you how to configure bgp routing protocols on cisco router using three router. Download cisco ccnp routing pdf study guide snabay. Highest ip address of any of the routers loopback addresses. View and download cisco 2610xm configuration online. Cisco routers derive the router id in one of three ways and with the following precedence.
Cisco also recommends that these requirements be met before you attempt the configuration that is described in this document. Larger networks typically use open shortest path first ospf instead of rip. In our example, we will examine the figure below deeply. Generatingadefaultroute24 configuringlookupofdnsnames25 forcingtherouteridchoicewithaloopbackinterface25 controllingdefaultmetrics26. Now it is time to go deep and combine virtual link, lsa types and etc. The user can enable ospf frr to either automatically calculate a backup next hop, or to designate a backup next hop by using a routing policy. All routes marked with the character o are ospf routes.
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