Configure BGP as shown in Figure 2-14 with the following peering: R3R2, R2R1, R8R1, R8R6, R6R1, R6R4, R4R1, R6R5. Ensure loopback interfaces are used to peer where possible. Ensure minimal configuration on all BGP routers with multiple peers.
Figure 2-14. IP EGP Diagram
Inject the following networks into BGP via new loopback interfaces:
R2: 2.2.2.2/29
R4: 4.4.4.4/24
R5: 5.5.5.5/27
R8: 8.8.8.8/28
Configure your network so that when network 5.5.5.0/27 is advertised to AS62555 it appears as if the network originated from AS61555; do not perform any configuration on R5.
Make the route 8.8.8.0/28 from AS63555 into R6 and R1 appear as if the previous autonomous system path was from AS60000. Do not use any autonomous system prepending and make sure that R8 is running router BGP 63555 as its BGP process.
You will find that R4 prefers the BGP route to network 5.5.5.0/27 via next-hop R1 10.1.1.1. Ensure that R4 prefers this network via the next-hop of R5 10.5.5.5. You are only permitted to perform configuration on R1 within BGP and not by manipulating the underlying IGP. You must also not use any form of route map, autonomous system path manipulation, metric, or filter-related configuration.
You will find that R4 prefers the BGP route to network 8.8.8.0/28 via next-hop R1 10.1.1.1. Ensure that R4 prefers this network via the next-hop of R6 10.6.6.6. You are only permitted to perform configuration on R1 and should use a Multi Exit Discriminator (MED) technique to ensure that this and only this route from R1 is effectively penalized.
