International Travel Agency has just connected two regional headquarters to San Jose using Frame Relay in a hub-and-spoke topology. You are asked to configure OSPF routing over this type of network, which is known for introducing complications into OSPF adjacency relationships. To avoid these complications, you must manually override the Non-Broadcast Multi-Access (NBMA) OSPF network type and configure OSPF to run as a point-to-multipoint network. In this environment, no DR or BDR is elected. | Configuring Point-to-Multipoint OSPF Over Frame Relay Alternate 1 - 6 Semester 5 Advanced Routing - Lab Copyright 2001 Cisco Systems Inc. Objective In this lab configure OSPF as a point-to-multipoint network type so that it operates efficiently over a hub-and-spoke Frame Relay topology. Scenario International Travel Agency has just connected two regional headquarters to San Jose using Frame Relay in a hub-and-spoke topology. You are asked to configure OSPF routing over this type of network which is known for introducing complications into OSPF adjacency relationships. To avoid these complications you must manually override the Non-Broadcast Multi-Access NBMA OSPF network type and configure OSPF to run as a point-to-multipoint network. In this environment no DR or BDR is elected. Step 1 Cable the network according to the diagram. Note This lab requires another router or device to act as a Frame Relay switch. The first diagram assumes that you will use an Adtran Atlas 550 which is preconfigured. The second diagram assumes that you will configure a router with at least three serial interfaces as a Frame Relay switch. See the configuration at the end of this lab for an example of how to configure a router as a Frame Relay switch. If desired you can copy the configuration to a 2600 router for use in this lab. Configure each router s FastEthernet interface as shown but leave the serial interfaces and OSPF routing unconfigured for now. Assign loopback interfaces to each router at your discretion be sure they are unique within your network . Until you configure Frame Relay you will not be able to use ping to test connectivity. Step 2 SanJose3 acts as the hub in this hub-and-spoke network. It reaches London and Singapore via two separate PVCs. Configure Frame Relay on SanJose3 s serial interface as shown here SanJose3 config interface serial 0 0 SanJose3 config-if encapsulation frame-relay ietf SanJose3 config-if ip address .
