Tarjetas de Preferencia Local BGP
Preferencia Local BGP: Guía Completa para Estudiantes
Toca para girar · Desliza para navegar
BGP Local Preference
9 tarjetas
Tarjeta 1
Pregunta: What type of BGP attribute is Local Preference classified as?
Respuesta: A well-known discretionary attribute (must be recognized by all routers but optional in updates).
Tarjeta 2
Pregunta: Between which BGP routers is Local Preference exchanged?
Respuesta: It is exchanged between iBGP (internal BGP) routers only.
Tarjeta 3
Pregunta: Is Local Preference sent to eBGP peers?
Respuesta: No — it is never sent to eBGP peers.
Tarjeta 4
Pregunta: What is the default value of BGP Local Preference?
Respuesta: 100.
Tarjeta 5
Pregunta: How does Local Preference affect route selection?
Respuesta: Higher Local Preference makes a route more preferred; it controls outbound (exit) path selection within your autonomous system.
Tarjeta 6
Pregunta: Why might you use Local Preference instead of BGP weight when influencing path selection across your AS?
Respuesta: Because Local Preference is exchanged across all iBGP routers, so configuring it on one router propagates the preference throughout the AS, unlike wei
Tarjeta 7
Pregunta: How can Local Preference be configured globally?
Respuesta: With the command bgp default local-preference.
Tarjeta 8
Pregunta: How can Local Preference be set per neighbor?
Respuesta: By using route-maps applied to neighbors (ensure the route-map is activated by linking it to the BGP neighbor).
Tarjeta 9
Pregunta: What advantage do route-maps provide when setting Local Preference?
Respuesta: Route-maps offer a more flexible solution for setting Local Preference per neighbor or policy.