How Does Bgp Choose The Best Path?
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BGP chooses the best path based on a combination of metrics including local preference, weight, origin, AS–PATH, MED, and neighbor. The most important criteria are typically weight (if configured) followed by the lowest AS–PATH, with other metrics being used to break ties if needed.
BGP chooses the best path to a destination based on a combination of metrics, including:
1. The length of the AS–Path;
2. The Origin Code;
3. Local Preference;
4. MED (Multi–Exit Discriminator);
5. WEIGHT Attribute;
6. IGP Metrics;
7. Community Attribute;
8. Atomic Aggregate Attribute; and
9. AS–Set Attribute.