What is the next step in BGP path selection after verifying the next-hop address can be reached?

The next step in the BGP path selection process, after verifying that the next-hop address can be reached, is to prefer the highest local-preference value. Local preference is a BGP attribute used within an autonomous system to indicate a preferred exit point for outbound traffic. When multiple paths exist to the same destination, the path with the highest local-preference value is chosen. This is crucial for controlling the flow of traffic within an AS, allowing network administrators to influence routing decisions based on their policies.

In practice, local preference is typically set by network operators to prioritize certain routes over others, and it influences the decision-making process in BGP significantly. The use of the highest local-preference value as a criterion reflects its importance in determining the best path for outgoing traffic.

The other options related to origin value and AS-path length come into play later in the BGP decision-making process, but they are considered only after local preference is evaluated. Therefore, understanding that local preference is examined first highlights its role as a powerful tool for traffic engineering in BGP.