I have frame relay setup over hub and spoke topology. Cbt nuggets trainer jeremy cioara discusses how to configure a frame relay switch. Configuring a pointtomultipoint frame relay wan free ccna. But because looks like you cannot edit the framerelay configuration, your lab is over and successful. In typical hubandspoke topology, it does not matter. Hub will not relay broadcasts from one spoke to another. This lab will discuss and demonstrate the configuration and verification of multipoint frame relay interfaces. 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. Having said that lets have some fun with framerelay. Frame relay is the most widely used wan technology because it.
Frame relay multi point hub and spoke using cisco routers. Originally designed for transport across integrated services digital network isdn infrastructure, it may be used today in the context of many other network. There are two pvcs and you can see the dlci numbers in the picture. 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. Frame relay multi point hub and spoke using cisco routers in gns 3 router switch configuration using packet tracer gns3. As customer can use any routing protocol to send his. Ccnp framerelay configuration lab hub and spoke gns3. My question is how do i connect them physically back to back with a db60 dtedce cable. In an nbma frame relay topology, when a single multipoint interface must be used to interconnect multiple sites, routing update reachability issues may result. All locations plug into the frame relay cloud, which is a conglomeration of dozens or hundreds of framerelay switches and routers. Dmvpn topology behaves like a pointtomultipoint topology, where multipointgre is configured in the hub.
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. Frame relay is wellsuited for a hub and spoke design. Scenario international travel agency has just connected two regional headquarters to san jose using frame relay in a hubandspoke topology. How to configure frame relay in cisco packet tracer jesins. Eigrp framerelay hub and spoke using cisco routing devices 1of 2. 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. Frame relay provides a mechanism to allow a physical interface to be partitioned into multiple virtual interfaces. Frame relay tutorialnetwork,frame,switch,topology,service. You can also try this on live routers and other network simulators.
Frame relay is associated with layer 2 of the osi model. In this lesson well take a look at framerelay pointtopoint which is far easier to configure. As a ccna candidate you are familiar with the concept of framerelay, although you do not need to configure the framerelay switch. Paris should be the hub and berlin and stockholm are spoke routers. 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 youtube. Using ip multicast over frame relay networks cisco. 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. Dec 04, 2011 this article will explain frame relay configuration in cisco packet tracer. Frame relay basic configurations hub and spoke cisco. In this lesson well take a look at frame relay pointtopoint which is far easier to configure.
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. First we need to configure interfaces, subinterfaces. It avoids splithorizon issues with distance vector routing protocols. The hub router is configured with three separate tunnel interfaces, one for each spoke. How to configure frame relay in cisco packet tracer. This article will explain frame relay configuration in cisco packet tracer. 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.
This topology is commonly used in realworld frame relay networks where a large number of remote offices are connected to the company headquarters. Minimum frame relay configuration frame relay network headquarters hub city satellite office 1 spokane 172. Frame relay is a layer 2 data link widearea networking wan protocol that. Frame relay is inherently a nonbroadcast multiaccess nbma network. R1 happens to be the hub in this huband spoke topology. 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. Thus, in general, framerelay is less expensive than dedicated wan lines, but customers are not guaranteed bandwidth. It is a special case of partial mesh topology also known as hub and spoke. 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.
This is the least expensive topology because it requires the fewest pvcs. 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. 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. In previous lessons i gave an introduction about frame relay and explained how to configure framerelay pointtomultipoint. Configuring pointtomultipoint ospf over frame relay. 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. To get this working you have to do next configurations. The cloud is the frame providers network, and the customer has no control or even. 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. Frame relay basic configurations hub and spoke part 1. You can also try this on live routers and other network simulators, but the frame relay switch configuration varies. First we need to configure interfaces, subinterfaces and frame relay encapsulation for our 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.
An adtran white paper private ip service bgpmpls vpn. 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. Frame relay point to point with eigrp get networking. Scenario international travel agency has just connected two regional headquarters to san jose using frame relay in a hub and spoke topology. Isp and all this configuration will be done on isp end including the assignment of dlci numbers. Read the wikipedia article to learn more about frame relay. In this lab, configure ospf as a pointtomultipoint network type so that it operates efficiently over a hubandspoke frame relay topology. Configuring frame relay subinterfaces cisco frame relay. Scenario your isp has provisioned frame relay pvcs for the international travel agency wan.
The diagram below shows a pointtopoint gre vpn network. Frame relay networks can be designed using star, fullmesh, and partialmesh topologies. Frame relay networks provide nbma connectivity, using a hub andspoke topology, between remote sites. 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. Icnd2 frame relay question 1 what can be done to frame relay to resolve splithorizon issues. When it comes to the hub and spoke topology, the hub is most commonly deployed with a pointtomultipoint interface. 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. There are only two dlcis in the topology, so it is a classic hubandspo. Broadcast, used for mapping dlcis, is essential when implementing multipoint frame relay hub and spoke networks.
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. 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. In previous lessons i gave an introduction about framerelay and explained how to configure framerelay pointtomultipoint. 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. As the administrator, you are responsible for configuring frame relay among regional offices. 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. Each gre tunnel between the hubspoke routers is configured with its unique network id. Frame relay is one of the most popular wan service deployed over the past decade. Star topologies require the fewest pvcs, making them. In this topology, remote sites are connected to a central site that generally provides a service or application. This means that although frame relay interfaces support multipoint connections by default, broadcast routing updates are not forwarded to remote sites. 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. Question 7 what occurs on a frame relay network when the cir is exceeded. 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.
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. For example, in a hubandspoke configuration, traffic must first travel. Graph of approximate vcs required by network topology. 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. Frame relay networks provide nbma connectivity, using a hub and spoke topology, between remote sites. Basic concepts of frame relay explained in easy language. There are only two dlcis in the topology, so it is a classic hub and spo. Understanding cisco dynamic multipoint vpn dmvpn, mgre. Frame relay basic configurations hub and spoke part 1 of 4 frame relay is wellsuited for a hub and spoke design. We can take advantage of frame relay s ability to assign more than one virtual. Each frame relay subinterface is mapped with the dlci number of the corresponding circuit configured in the packet tracer wan emulation cloud. 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. Relay and atm were the first technologies widely adopted to implement vpns.
But because looks like you cannot edit the frame relay configuration, your lab is over and successful. I have two cisco 2610xm with one of them got a serial nm4as 4 serial ports asyncsync and this would be my frs router. Eigrp framerelay hub and spoke using cisco routing. Configuring a pointtomultipoint frame relay wan free. 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. Frame relay topology frame relay is a nonbroadcast multiaccess nbma connection scheme. The hub and spoke topology is also named a star topology, because the central hub acts as the center of a star and. 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. We can take advantage of frame relays ability to assign more than one virtual circuit. Ccnp route study eigrp over frame relay notthenetwork.
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. Hub and spoke remote sites are connected to a central site that generally provides a service or application. Peer pointtopoint star hub and spoke, pvcs exist from main site to each remote site. In this step, you configure ospf for hubandspoke over frame relay using the nbma ospf network type, which is the default.
Remote sites are connected to a central site, which usually provides a service. Partial mesh full mesh here each router has pvc to every router in the frame relay network the same have been depicted in. You can implement a hubandspoke vpn topology by using the routebased vpn concept in. All spokes connect directly to the hub using a tunnel interface. Some characteristic of frame relay hub and spoke topology includes. Consider a hub and spoke frame relay network consisting of three routers, r1, r2, r3. In this lab, configure ospf as a pointtomultipoint network type so that it operates efficiently over a hub and spoke frame relay topology. C explanation an example of the output of show framerelay map command is shown below. 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.
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