Router used as powerpoint presentation free to download id. Configure ospf to allow full connectivity between all departments. The hub and spoke design is basically a star design utilizing frame relay s advantage of provisioning multiple vcs on a single physical connection often referred to as the access circuit. Frame relay is the source of many tricky questions on ccna, ccnp, and beyond. Pdf establishing frame relay connections using packet tracer.
Frame relay basic configurations hub and spoke part 1 of 4frame relay is wellsuited for a hub and spoke design. To provide efficient ip multicast support in frame relay networks, the underlying frame relay network architecture should be designed in a hub and spoke topology hierarchical topology. If you have a number of sites using frame relay for transport between them and the topology is a hub and spoke topology, then even if you only have delay sensitive traffic such as voip at a couple of the sites you will need to enable frf. At the hub router r3, two subinterfaces are created on the physical serial interface 31. How to configure framerelay hub and spoke in simple. The rmp evc is very similar to a hubandspoke topology where a hub. Pdf frame relay is a protocol used for connecting devices on a wide area. Lets assume that in our lab today we have a basic frame relay hub and spoke topology with r2 being our hub, and r4, r5, and r6 being our spokes. In certain cases, you may have a working frame relay connection by just using a single command encpsulation framerelay, and leaving everything else to default values. According to the route cert library of cisco, if you have a multipoint frame relay hub spoke topology configuration, the bandwidth of the hub router is set based on the lowest bandwidth multiply by the number of pvc.
For hub and spoke frame relay the use of point to point subinterfaces is usually the preferred practice. It is a special case of partial mesh topology also known as hub and spoke. Question 7 what occurs on a frame relay network when the cir is exceeded. Which statement about the selection of a dynamic protocol is true. To implement a hubandspoke topology for this lab, both frame relay maps on london reference dlci 201. The second configuration, figure 6, shows mgre at the hub and spoke routers, which will allow the spoke routers. Provides greater bandwidth than leased line reduces cost because it uses less equipment easy to implement frame relay is associated with layer 2 of the osi model and encapsulates data packets in a frame relay frame frame relay is configured on virtual circuits.
Aug 12, 2019 frame relay configuration isr router configuration frame relay hub router configuration r0 the hub router is configured with two subinterfaces to create a virtual circuit with each spoke. There are two pvcs and you can see the dlci numbers in the picture. Frame relay networks can be designed using star, fullmesh, and partialmesh topologies. Dec 05, 2020 what is frame relay hub and spoke topology networking virtualization ccna 200 301 v1 0 frame relay explained with examples orbit computer solutions com frame relay analyzer frame relay part i ccna blog how frame relay works switch switches telco edge data center. Figure 1 shows the network topology used in this configuration example. For example, in a hub and spoke configuration, traffic must first travel. In lab 91 when you configured ospf initially you had to change the frame relay hub and spoke network type to broadcast to ensure the neighbor relationships formed. Comprehensive guide to configuring and troubleshooting frame. The three locations are connected over hubandspoke frame relay. In this step, you configure ospf for hub and spoke over frame relay using the nbma ospf network type, which is the default. Before implementing dmvpn as a hub and spoke solution, or streaming multicast with a dynamic multipoint.
In this lab you will revert the routers serial interfaces in the hub and spoke topology back to its default, nonbroadcast and configure a static neighbor statement on r1. If you have multiple sites, you can place all routers from all the sites on one subnet. How to configure frame relay in cisco packet tracer jesins. This implementation uses a star or hub and spoke topology in which frame relay devices are not connected to every other device in the frame relay cloud. Depending on the topology of a customers frame relay network, packets traveling over a frame relay network may experience high latency relative to ip networks with anytoany connectivity. Star topology a star topology, also known as a hub and spoke. Configuring a pointtomultipoint frame relay wan free ccna. Enable eigrp manual summarization in topologies with discontiguous major networks. Configuracion framerelay hub and spoke cisco packet. To configure framerelay hub and spoke is not very difficult. However, you should be familiar with the many configuration options and when they are used. Using a hub and spoke design which is a star topology only two virtual circuits vcs and three router interfaces are needed to connect three endpoints.
How to configure frame relay in cisco packet tracer. The topology of a frame relay network is comprised of different design formats. The physical devices have just been installed and connected over frame relay hub and spoke topology. Here is the configuration for the hub and spoke routers. How to configure a cisco router as a frame relay switch. A multipoint interface offers greater security compared to pointtopoint subinterface. The hub and spoke design is the design that many frame relay networks use. With a hubandspoke topology, all spoke circuits can share a single. No 21 your network consists of a large hub and spoke frame. Star topologies require the fewest pvcs, making them. Frame relay topologies a topology is the map or visual layout of the network. Ping r2s lo0 interface from r5s lo0 interface to ensure ip reachability. The most hard part is regarding fr switch, but luckily you dont have to deal with it, as this is usually a provider equipment, and they will do the l2 to l3 framerelay routing, providing you with the need dlci information. To install software on a new router or access server by downloading software from a central.
This means that although frame relay interfaces support multipoint connections by default, broadcast routing updates are not forwarded to remote sites. Frame relay tutorialnetwork,frame,switch,topology,service. A more scalable, less expensive solution is needed that also does not cause a bandwidth bottleneck at the hub router. Read the wikipedia article to learn more about frame relay. Manual vlan packet tracer configuration in cisco readdownload if you configure variou. This simple network is an example of a frame relay hub and spoke topology and. Unless there is some particular reason to implement multipoint i would suggest that point to point is the better way to go. When it comes to the hub and spoke topology, the hub is most commonly deployed with a pointtomultipoint interface. The solution here is we can use 512 6 85 kbps on each subinterface of hub by using bandwidth 85 command. Feb 08, 2015 cisco confidential configure subinterfaces reachability issues frame relay networks provide nbma connectivity, using a hub and spoke topology, between remote sites. One way to fix this is to add static frame relay maps for the spoke physical ip addresses directly connected in the frame relay network.
The second configuration, figure 6, shows mgre at the hub and spoke. The setup here will use the hub and spoke configuration, router0 is the hub, router1 and router2 are the spokes. You can also try this on live routers and other network simulators, but the frame relay switch configuration varies. The main frame relay interface on hub router is 512kpbs which is not enough to use for 6 links of 128 kbps 768 kbps. Frame relay free download as powerpoint presentation. My question is how do i connect them physically back to back with a db60 dtedce cable to make them a hub and spoke. Which interface configuration commands are required on router a. Configuring ospf static neighbors free ccna workbook. Every network or network segment can be viewed as being one of three topology types. Each format has its advantageous and disadvantageous. There are a couple of options for creating a frame relay topology. The exhibit is a frame relay hub and spoke topology with router a as the hub. Frame relay is the most widely used wan technology because it. A network where all sites are connected with each others via direct link.
In future work, different frame relay topologies such as. In an nbma frame relay topology, when a single multipoint interface must be used to interconnect multiple sites, routing update reachability issues may result. To implement a hub and spoke topology for this lab, both frame relay maps on london reference dlci 201. Ip addresses can be conserved if vlsm is not being used for subnetting. The hub and spoke topology is also named a star topology, because the central hub acts as the center of a star and the connections to the remote sites act. To simulate the frame relay wan connections, use a router with three serial ports to act as a frame relay.
Dec 18, 2011 the previous article on configuring frame relay on cisco packet tracer explains it on a simulator, in this article ill show how a cisco router can be used as a frame relay switch. Frame relay network topology network congestion free. My question is how do i connect them physically back to back with a db60 dtedce cable to make them a hub and spoke network. Physical topologies include hubandspoke, mesh, and hybrid configuration.
Frame relay basic configurations hub and spoke part 1. A hub and sopke sample network topology is created in cisco packet tracer 7. Sample hub and spoke frame relay network this simple network is an example of a frame relay hub and spoke topology and should give you a good idea of how dlci mappings work in a frame relay network. The same hub and spoke topology is used, only the frame relay switch router configuration is explained here refer the previous article for the hub router and spoke. For today, i prepared a presentation about how you can create a framerelay hub and spoke topology in gns3, save and use it whenever you need it. Figure 5 may be a configuration some have seen before, but it will force the tunneled nbma network into a hub and spoke topology so the spoke routers will not be able to dynamically build a vpn to another spoke router. Note to instructors if you have downloaded this presentation from. The network requirements along with the considerations outlined above on the number of pvcs required in a design need to be addressed in using the various topology layouts. Create a topology as illustrate in following figure or download this precreated topology. Similarly, both frame relay maps on singapore reference dlci 301. This command assigns a higher priority for this router on this interface. We will also introduce you to some additional frame relay configuration options not seen in the first example.
The most common topology used in frame relay today is the hubandspoke. As i dont have 3 serial interfaces, cant i set up a subinterface on the. Frame relay is a layer 2 data link widearea networking wan protocol that. Jul 03, 20 hub and spoke topology has the single point of failure if hub routerdevice is down then no other routers can communicate with each other. For example, in our frame relay topology a hub is connected with 4 spoke routers. Ensure you can ping both routers from router cinderella. However the default network type for ospf on a serial interface with frame relay encapsulation is nonbroadcast. On partially meshed frame relay networks, the problem of split horizon can be overcome by using frame relay subinterfaces. Here, topology is hub and spoke, with r1 the hub each pvc connects two interfaces pointtopoint, so requires separate ip subnet r1s s000 interface must be configured with two subinterfaces 21.
Having said that lets have some fun with frame relay. If you create a topology that uses vlans, you can drag a gns3 ether net switch node. Hub and spoke frame relay configuration cisco community. It avoids splithorizon issues with distance vector routing protocols. The static neighbor statement only needs to be configured on the hub however its best to configure it on both hub and spokes to ensure initialization of neighbor negotiation. You need to consider the topology from to understand the network and the equipment used to build the network. Verify that routes from r2 and r3 are now being propagated through the hub to r4 and r5. Sep 14, 2011 configure all routers to use frame relay encapsulation. Also you say that the hub has point to point subinterfaces and this is generally the best practice for frame relay. In this topology, remote sites are connected to a central site that generally provides a service or application. As mentioned in the frame relay topologies and designs lesson, the hub and spoke design really highlights the benefits of frame relay.
Using ip multicast over frame relay networks cisco. Disable frame relay inverse arp and make sure to configure the correct frame relay mappings. Frame relay configuration has any options, yet the actual configuration you perform can be very basic depending on how many default settings can be used. Configuracion framerelay hub and spoke cisco packet tracer. Eigrp would be appropriate if lmi type ansi is not used. You want to use the ospf routing protocol between all three locations.
A star topology, also known as a hub and spoke configuration, is the common network topology. Each frame relay subinterface is mapped with the dlci number of the corresponding circuit configured in the packet tracer wan emulation cloud. Many of us understand hub and spoke to be remote routers connected directly to a central hub router while a star is remote routers where some of the remote routers have direct connections to other remotes. Frame relay topology frame relay is a nonbroadcast multiaccess nbma connection scheme. Remote sites are connected to a central site, which usually provides a service. Disable ip splithorizon for eigrp autonomous system 10 on r1s frame relay hub interface. Graph of approximate vcs required by network topology. Hello, i am trying to solve a lab, but i got stuck. Dec 04, 2011 how to configure frame relay in cisco packet tracer.
The adobe flash plugin is needed to view this content. Through this function, a bgp router can download its inbound filter as an. This will allow connectivity between the two physical interfaces. You only have to specify encapsulation framerelay on the physical interface. In a vti design, a hub and spoke topology is used, as shown in figure 2. Dec 06, 2005 any network requirement inherited from a frame relay or private line network, such as support for.
This tutorial does not include the configuration of the devices which form framerelay hub and spoke, but only the gns3 lab topology. The atlas frame relay configuration implements a full mesh topology. The nbma next hop address in this example is a frame relay dlci number. Mesh topology in cisco packet tracer ap interactive. Frame relay basic configurations hub and spoke cisco. Dlci 201 on london and dlci 301 on singapore cause the atlas to switch frames to the. Frame relay is inherently a nonbroadcast multiaccess nbma network. C explanation an example of the output of show frame relay map command is shown below. Frame relay is associated with layer 2 of the osi model. I have two cisco 2610xm with one of them got a serial nm4as 4 serial ports asyncsync and this would be my frs router. Frame relay network topology network congestion free 30. Configure the ip addresses as specified in the topology picture on pointtomultipoint subinterfaces. A topology of twenty routers would need a total of 190 virtual circuits and 380 map statements. In a hubandspoke network environment, the number of vcs required can be represented.
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