What are the three basic steps to configuring BGP?

• A. Define the BGP process, establish the neighbor relationships and advertise the networks into BGP
• B. Enter BGP configuration mode, assign interfaces, enable IGP
• C. Configure the router ID, enable OSPF neighbor, and set route-maps
• D. Define the BGP policy, configure route reflectors, and set med attribute

Answer: (A)

Starting BGP involves three essential actions that let the router participate in the global routing table. First, define the BGP process by configuring the local Autonomous System number, which creates the BGP instance on the device. This establishes the identity of your router in the BGP world. Next, establish neighbor relationships by specifying the peers and their remote AS numbers. Without these, the router has no one to exchange routes with, so no routing information would flow. Finally, advertise networks into BGP so those routes become part of the BGP routing table and can be shared with peers. This is typically done with network statements that match networks in the local routing table or by redistributing routes from another protocol into BGP. Together, these steps enable a functioning, exchange-enabled BGP configuration.

The other options mix in elements that aren’t part of these basic steps. Assigning interfaces and enabling an IGP aren’t required to set up the core BGP process and neighbor exchange. Using an OSPF neighbor or focusing on router IDs in this context introduces other protocols or details not central to establishing BGP’s basic operation. Advanced features like route reflectors, policies, or MED attributes are important in more complex setups, but they’re not part of the three foundational steps.