Question

Refer to the exhibit. OSPF operates as the IGP to provide reachability to every AS100 network. R3 and R4 are the current ABRs on the boundary between OSPF Area 0 and Area 1. BGP must now be deployed within AS100 because it will receive Internet routes from eBGP peers (the service provider) connected to R1 and R2. What is an optimal deployment solution for configuring BGP relationships and redistributing BGP-learned routes into OSPF?

Accepted Answer

A. R5 should be configured as a route reflector for R1, R2, R3 and R4. BGP routes must be redistributed at R1 and R2 into OSPF.

Answer

Confederation should be set up with R1, R5, and R3 in one sub AS, with R2 and R4 in another, and redistribution at R1 and R2.

Answer

R1, R2, R3 and R4 must be set up with a neighbor relationship with R5 only. R5 must not be a route reflector.

Answer

A full mesh should be deployed between all the routers with mutual redistribution to take place at R1 and R2.