Both paths have identical attributes. What is the next BGP tiebreaker?
- Lowest router ID
- Oldest EBGP path
- Lowest neighbor IP address
- Shortest cluster list
Explanation: According to the sources, the BGP path selection process follows a specific sequence of rules to determine the best route. When paths have identical attributes such as Weight, Local Preference, and AS_Path length, and the IGP cost to the next hop is equal, the router looks for further tiebreakers. The next step in this hierarchy for EBGP routes is to prefer the oldest EBGP path, as it is considered the most stable. If a decision still cannot be made, the router then evaluates the lowest BGP router ID, and the final factor considered is the lowest neighbor IP address.
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