For example, if there is a hub and spoke frame relay topology where the hub has a t1 speed and the remote routers have 64 kbps port. Frame relay topology frame relay is a nonbroadcast multiaccess nbma connection scheme. Question 7 what occurs on a frame relay network when the cir is exceeded. Originally designed for transport across integrated services digital network isdn infrastructure, it may be used today in the context of many other network.
We are using the same topology with one difference. How to configure frame relay in cisco packet tracer jesins. Configuring frame relay subinterfaces cisco frame relay. Cbt nuggets trainer jeremy cioara discusses how to configure a frame relay switch.
Configuring a pointtomultipoint frame relay wan free ccna. Paris should be the hub and berlin and stockholm are spoke routers. There are only two dlcis in the topology, so it is a classic hubandspo. Frame relay is wellsuited for a hub and spoke design. For example, on a hubandspoke frame relay network, where there are several layer 3 networks it is a layer3 star topology, we can use static address mapping on the spoke routers to provide spoketospoke tips of the star reachability. It avoids splithorizon issues with distance vector routing protocols.
C explanation an example of the output of show framerelay map command is shown below. Scenario your isp has provisioned frame relay pvcs for the international travel agency wan. Relay and atm were the first technologies widely adopted to implement vpns. In typical hubandspoke topology, it does not matter. I have two cisco 2610xm with one of them got a serial nm4as 4 serial ports asyncsync and this would be my frs router. Mappings need to be provided statically for spoke to spoke reachability due to hub not relaying inversearp icmp redirect messages are sent by the hub when both incoming and outgoing interface is the same when spokes communicate with spokes broadcasts are not sent beyond the hub router. In this topology, remote sites are connected to a central site that generally provides a service or application. Minimum frame relay configuration frame relay network headquarters hub city satellite office 1 spokane 172. There are only two dlcis in the topology, so it is a classic hub and spo. Framerelay hub and spoke i have a r1 hub and r2 and r3 spokes are connected as network type nonbroadcast which is default on physical serial links.
Scenario international travel agency has just connected two regional headquarters to san jose using frame relay in a hub and spoke topology. 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. First we need to configure interfaces, subinterfaces and frame relay encapsulation for our routers. Frame relay multi point hub and spoke using cisco routers in gns 3 router switch configuration using packet tracer gns3. Frame relay tutorialnetwork,frame,switch,topology,service. As a ccna candidate you are familiar with the concept of framerelay, although you do not need to configure the framerelay switch. We can take advantage of frame relay s ability to assign more than one virtual. Frame relay provides a mechanism to allow a physical interface to be partitioned into multiple virtual interfaces. A practical guide to understanding, designing, and deploying mpls and mplsenabled vpns indepth analysis of the multiprotocol label switching mpls architecture detailed discussion of the mechanisms and features that constitute the architecture learn how mpls scales to support tens of thousands of vpns extensive case studies guide you through the design and. This is the least expensive topology because it requires the fewest pvcs. Jun 27, 20 there are a couple of gotchas when running eigrp over a wan technology such as frame relay, as opposed to a lan technology like ethernet. Basic concepts of frame relay explained in easy language.
Consider a hub and spoke frame relay network consisting of three routers, r1, r2, r3. Dmvpn topology behaves like a pointtomultipoint topology, where multipointgre is configured in the hub. The cloud is the frame providers network, and the customer has no control or even. Originally designed for transport across integrated services digital network isdn infrastructure, it may be used today in the context of many other network interfaces. Frame relay basic configurations hub and spoke part 1. This means that although frame relay interfaces support multipoint connections by default, broadcast routing updates are not forwarded to remote sites.
As you already have seen we have here a hub and spoke topology, r1 is used as hub router and r2 with r3 are used as spoke routers. But because looks like you cannot edit the framerelay configuration, your lab is over and successful. Consider a hubandspoke framerelay network consisting of three routers, r1, r2, r3. How to configure frame relay in cisco packet tracer. Configuring a pointtomultipoint frame relay wan when it comes to the hub and spoke topology, the hub is most commonly deployed with a pointtomultipoint interface. Each frame relay subinterface is mapped with the dlci number of the corresponding circuit configured in the packet tracer wan emulation cloud. We can take advantage of frame relays ability to assign more than one virtual circuit. Configuring pointtomultipoint ospf over frame relay. Each gre tunnel between the hubspoke routers is configured with its unique network id. Here, topology is hubandspoke, 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. You can also try this on live routers and other network simulators.
In previous lessons i gave an introduction about frame relay and explained how to configure framerelay pointtomultipoint. 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. On partially meshed frame relay networks, the problem of split horizon can be overcome by using frame relay subinterfaces. R1 happens to be the hub in this huband spoke topology. Frame relay hub and spoke topology is also known as star topology, which have a single hub or central router provides access to different core services and all other routers are connected to this hub are called spoke. Frame relay is a layer 2 data link widearea networking wan protocol that. Hub will not relay broadcasts from one spoke to another. Ccnp framerelay configuration lab hub and spoke gns3.
There are two pvcs and you can see the dlci numbers in the picture. Ccnp route study eigrp over frame relay notthenetwork. 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. Icnd2 frame relay question 1 what can be done to frame relay to resolve splithorizon issues. My question is how do i connect them physically back to back with a db60 dtedce cable. As mentioned in the frame relay topologies and designs lesson, the hub and spoke design really highlights the benefits of frame relay. As customer can use any routing protocol to send his. Using ip multicast over frame relay networks cisco. The diagram below shows a pointtopoint gre vpn network.
You can also try this on live routers and other network simulators, but the frame relay switch configuration varies. 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. But because looks like you cannot edit the frame relay configuration, your lab is over and successful. Isp and all this configuration will be done on isp end including the assignment of dlci numbers. Hub and spoke remote sites are connected to a central site that generally provides a service or application. 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. Frame relay basic configurations hub and spoke part 1 youtube.
Even though several advanced technologies such as vpn, atm are available today, frame relay still rocks and will be in near future due to its features, benefits and lower cost in comparison with other point to point wan services. Frame relay is one of the most popular wan service deployed over the past decade. It must be configured with frame relay mapping for its multicast packets, including routing protocol update massages such as cisco eigrp, to be sent through the frame relay switch or cloud. Eigrp framerelay hub and spoke using cisco routing devices 1of 2. The hub and spoke design is basically a star design utilizing frame relays advantage of provisioning multiple vcs on a single physical connection often referred to as the access circuit. The hub and spoke design is the design that many frame relay networks use. This article will explain frame relay configuration in cisco packet tracer. In this lesson well take a look at framerelay pointtopoint which is far easier to configure. Frame relay is associated with layer 2 of the osi model. Some characteristic of frame relay hub and spoke topology includes. In an nbma frame relay topology, when a single multipoint interface must be used to interconnect multiple sites, routing update reachability issues may result. In this lab, configure ospf as a pointtomultipoint network type so that it operates efficiently over a hubandspoke frame relay topology.
In a hubandspoke network environment, the number of vcs required can be represented. Understanding cisco dynamic multipoint vpn dmvpn, mgre. There are a couple of gotchas when running eigrp over a wan technology such as frame relay, as opposed to a lan technology like ethernet. Frame relay basic configurations hub and spoke part 1 of 4 frame relay is wellsuited for a hub and spoke design. So it goes like this router one is the hub router two is spoke router three is spoke so the spokes are only connected to the hub, they are not directly connected to another.
I have frame relay setup over hub and spoke topology. Read the wikipedia article to learn more about frame relay. As the administrator, you are responsible for configuring frame relay among regional offices. Frame relay is the most widely used wan technology because it. Frame relay networks provide nbma connectivity, using a hub and spoke topology, between remote sites. Frame relay is inherently a nonbroadcast multiaccess nbma network. The network in figure 1looks like an ordinary frame relay hubandspoke or mesh network with two customers connected, represented by the blue and green labels. This lab will discuss and demonstrate the configuration and verification of multipoint frame relay interfaces. I am running ospf backbone 0 and advertising a network on r2 such as 100. Remote sites are connected to a central site, which usually provides a service. To demonstrate one of them lets consider a typical frame relay network operating in a hub and spoke configuration, with our hq router being the hub and our east and west branch office routers the spokes. In this lab, configure ospf as a pointtomultipoint network type so that it operates efficiently over a hub and spoke frame relay topology.
The hub and spoke topology is also named a star topology, because the central hub acts as the center of a star and. When it comes to the hub and spoke topology, the hub is most commonly deployed with a pointtomultipoint interface. Scenario in an effort to cut costs, the international travel agency has been monitoring the internetwork traffic patterns of its full mesh frame relay topology. A practical guide to understanding, designing, and deploying mpls and mplsenabled vpns indepth analysis of the multiprotocol label switching mpls architecture detailed discussion of the mechanisms and features that constitute the architecture learn how mpls scales to support tens of thousands of vpns extensive case studies guide you through the design and deployment of realworld mplsvpn. An adtran white paper private ip service bgpmpls vpn. Broadcast, used for mapping dlcis, is essential when implementing multipoint frame relay hub and spoke networks. 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. First we need to configure interfaces, subinterfaces. For example, in a hubandspoke configuration, traffic must first travel. Configuring a pointtomultipoint frame relay wan free. You can implement a hubandspoke vpn topology by using the routebased vpn concept in. It is a special case of partial mesh topology also known as hub and spoke. The hub router is configured with three separate tunnel interfaces, one for each spoke.
All spokes connect directly to the hub using a tunnel interface. Peer pointtopoint star hub and spoke, pvcs exist from main site to each remote site. Frame relay multi point hub and spoke using cisco routers. Partial mesh full mesh here each router has pvc to every router in the frame relay network the same have been depicted in the figure4 above. This topology is commonly used in realworld frame relay networks where a large number of remote offices are connected to the company headquarters. A star topology, also known as a hub and spoke configuration, is the most popular frame relay network topology because it is the most costeffective. Star topologies require the fewest pvcs, making them. A star topology, also known as a hubandspoke configuration, is the common network topology. Frame relay networks provide nbma connectivity, using a hub andspoke topology, between remote sites. Partial mesh full mesh here each router has pvc to every router in the frame relay network the same have been depicted in. Graph of approximate vcs required by network topology. In this step, you configure ospf for hubandspoke over frame relay using the nbma ospf network type, which is the default. To get this working you have to do next configurations.
All locations plug into the frame relay cloud, which is a conglomeration of dozens or hundreds of framerelay switches and routers. In previous lessons i gave an introduction about framerelay and explained how to configure framerelay pointtomultipoint. Frame relay basic configurations hub and spoke cisco. Having said that lets have some fun with framerelay. Frame relay point to point with eigrp get networking. Frame relay networks can be designed using star, fullmesh, and partialmesh topologies. 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. 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. Scenario international travel agency has just connected two regional headquarters to san jose using frame relay in a hubandspoke topology. In this lesson well take a look at frame relay pointtopoint which is far easier to configure. Eigrp framerelay hub and spoke using cisco routing. Dec 04, 2011 this article will explain frame relay configuration in cisco packet tracer. Thus, in general, framerelay is less expensive than dedicated wan lines, but customers are not guaranteed bandwidth. Frame relay is a standardized wide area network technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology.
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