Transit AS Routing

1-2 Semester 8 Internetwork Troubleshooting v1.0 - Lab 14.3.3.2 Copyright  2001, Cisco Systems, Inc. Lab 14.3.3.2: Transit AS Routing AS200 Fa0/0 10.1.1.2/24 S0/0 DCE .1 .2 S0/0 Fa0/0 192.168.0.1/24 AS100 ISP1A SanJose1 10.0.0.0/30 ISP1B Fa0/0 10.1.1.1/24 IBGP EBGP Objective Successful propagation of customer routes through IBGP. Scenario You are a network administrator for an ISP with autonomous system number 200. Your autonomous system is multi-homed to various customers including AS 100 for the International Travel Agency (ITA). Routers running IBGP within AS 200 cannot reach AS 100. Step 1 Cable the lab as shown in the diagram. Load the configuration files into your routers. 2-2 Semester 8 Internetwork Troubleshooting v1.0 - Lab 14.3.3.2 Copyright  2001, Cisco Systems, Inc. Step 2 Start the investigation on router ISP1B with show ip bgp, show ip route and show ip bgp 10.1.1.2; record results below: Step 3 Based on the output and your knowledge of BGP, what are some possible causes for routers from other autonomous systems cannot reach AS 100? Step 4 What is your action plan for allowing traffic originating in or transiting AS 200 to reach AS 100? Step 5 Implement your action plan and observe results with show ip bgp, show ip route and show ip bgp 10.1.1.2. Also, ensure connectivity with a ping from router ISP1B to the remote LAN in AS 100. Step 6 Document summary of problem, troubleshooting methods and resolution. . Cisco Systems, Inc. Lab 14.3.3.2: Transit AS Routing AS2 00 Fa0/0 10.1.1.2/24 S0/0 DCE .1 .2 S0/0 Fa0/0 192.168.0.1/24 AS1 00 ISP1A SanJose1 10.0.0.0/30 ISP1B. customers including AS 100 for the International Travel Agency (ITA). Routers running IBGP within AS 200 cannot reach AS 100. Step 1 Cable the lab as shown in