Scenario

The ISP, Interconnect Corp., is a startup company that is configuring its network. The company has a well-resourced network and is in the process of configuring the IBGP within the autonomous system. Figure 9-12 provides the diagram for the network in this scenario.

Figure 9-12 Diagram for Scenario 9-2

Figure 9-12 Diagram for Scenario 9-2

1 The original design required a fully meshed IBGP-4 network. This was calculated to mean 250 connections, which was deemed unacceptable because it would be too great of a drain on resources. Route reflectors are obviously the answer. Configure Router A to run BGP and as a route reflector to clients B and C.

2 Configure routers B and C to run BGP as clients to Router A.

3 Having configured the cluster, are any other tasks necessary?

4 The company has decided in its early stages to require organizations connecting into it to use default routes. How would these routes be disseminated without the organization's autonomous system, and how would an interior router running only an IGP determine which path out of the routing domain to take if it had more than one connection?

5 Given that the use of a default route by the client organization gives it the least configuration power to manage and manipulate its traffic flow, how would the network administrator justify this simple approach?

Review output screens in Examples 9-10 and 9-11, and answer the questions that follow.

Example 9-10 Scenario 9-3 Screen 1

Router# show ip prefix-list detail tryout ip prefix-list tryout: Description: tryout-list count: 1, range entries: 0, sequences: 5 - 10, refcount: 3 seq 5 permit 130.0.0.0/8 (hit count: 0, refcount: 1) seq 10 permit 44.0.0.0/8 (hit count: 28, refcount: 1)

FARADAY-gw# show ip bgp

BGP table version is 457017, local router ID is 200.172.136.21

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal

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