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352-001 · Question #144
352-001 Question #144: Real Exam Question with Answer & Explanation
The correct answer is A: access bandwidth. When tuning BGP keepalive and hold timers on a CE-PE link, the available bandwidth, service provider cooperation, and CE routing table size are the primary technical constraints that determine safe timer values.
Question
A senior network designer suggests that you should improve network convergence times by reducing BGP timers between your CE router and the PE router of the service provider. Which three factors should you to consider when you adjust the timer values? (Choose three.)
Options
- Aaccess bandwidth
- Bservice provider agreement to support tuned timers
- Cnumber of routes on the CE router
- Dnumber of VRFs on the PE router
- Eservice provider scheduling of changes to the PE
Explanation
When tuning BGP keepalive and hold timers on a CE-PE link, the available bandwidth, service provider cooperation, and CE routing table size are the primary technical constraints that determine safe timer values.
Common mistakes.
- D. The number of VRFs on the PE affects overall PE resource utilization but is not a direct input into calculating appropriate BGP timer values for a specific CE-PE session.
- E. SP scheduling of changes is an operational change-management concern, not a technical factor that influences what timer values are technically appropriate for the BGP session.
Concept tested. BGP timer tuning factors for CE-PE convergence
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