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Lab 6-1 Configuring BGP with Default Routing
Topology Diagram

Learning Objective In this lab, you will configure BGP to exchange routing information with two Internet Service Providers (ISPs). Scenario The International Travel Agency relies extensively on the Internet for sales. The company has contracted with two ISPs for Internet connectivity with fault tolerance. You need to configure BGP, which runs between the San Jose boundary router and the two ISP routers. Step 1: Assign IP Addresses Configure the network according to the diagram, but do not configure a routing protocol. Configure a loopback interface with an IP address for each ISP route shown in the diagram. These loopbacks simulate real networks that can be reached through the ISP. Configure two loopback interfaces with the IP addresses for the San Jose router. These loopbacks simulate the connections between the core routers.
Copyright © 2006, Cisco Systems, Inc

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CCNP: Building Scalable Internetworks v5.0 - Lab 6-1

Use ping to test the connectivity between the directly connected routers. Note that router ISP1 cannot reach router ISP2. Step 2: Configure the ISPs Configure the ISP routers, and the International Travel Agency’s boundary router, San Jose. On the ISP1 router, enter the following configuration:
ISP1(config)#router bgp 200 ISP1(config-router)#neighbor 10.0.0.2 remote-as 100 ISP1(config-router)#network 12.0.1.0 mask 255.255.255.0

On ISP2, configure BGP:
ISP2(config)#router bgp 300 ISP2(config-router)#neighbor 172.16.0.2 remote-as 100 ISP2(config-router)#network 172.16.1.0 mask 255.255.255.0

Step 3: Configure SanJose BGP Configure the San Jose router to run BGP with both providers:
SanJose(config)#router bgp 100 SanJose(config-router)#neighbor 10.0.0.1 remote-as 200 SanJose(config-router)#neighbor 172.16.0.1 remote-as 300 SanJose(config-router)#network 192.168.0.0 SanJose(config-router)#network 192.168.1.0

To verify the configuration, check the routing table for...

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