H12-821_V1.0 · Question #814
Inter-route selection rules, routes with high Local_Pref values take precedence.
The correct answer is A. TRUE. Local Preference (LOCAL_PREF) is a BGP attribute used within an autonomous system (AS) to influence outbound traffic path selection. When multiple routes exist to the same destination, BGP selects the route with the highest LOCAL_PREF value - making option A correct. This is an…
Question
Options
- ATRUE
- BFALSE
How the community answered
(19 responses)- A68% (13)
- B32% (6)
Explanation
Local Preference (LOCAL_PREF) is a BGP attribute used within an autonomous system (AS) to influence outbound traffic path selection. When multiple routes exist to the same destination, BGP selects the route with the highest LOCAL_PREF value - making option A correct. This is an intra-AS (inter-route) decision, giving network administrators control over which exit point is preferred.
Option B is wrong because it would imply either that LOCAL_PREF has no effect on selection, or that lower values are preferred - neither is true. BGP always favors the numerically highest LOCAL_PREF, with the default value typically being 100.
Memory tip: Think of LOCAL_PREF like a priority score - "local preference = local priority." Just as higher priority wins in most systems, the higher the LOCAL_PREF number, the more preferred the route. The acronym "Higher Local = Happier router" can help anchor this.
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