350-501 Security and Services Practice Question
A service provider wants to gracefully shut down a BGP session to a customer for maintenance without causing traffic loss. Which BGP feature should be used to signal the peer to reroute traffic before the session is brought down?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
BGP Graceful Shutdown (GSHUT)
BGP Graceful Shutdown (GSHUT) uses a well-known community or attribute to inform peers that the session is going down, allowing them to reroute traffic. BFD detects failures fast but does not signal; TTL propagation is for MPLS; route refresh is for soft reconfiguration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
BGP TTL Security
Why it's wrong here
This is for protecting against CPU attacks, not maintenance.
- ✗
BGP Route Refresh
Why it's wrong here
Route refresh re-advertises routes, not for graceful shutdown.
- ✓
BGP Graceful Shutdown (GSHUT)
Why this is correct
GSHUT advertises routes with a low local preference to drain traffic.
- ✗
BGP Fast External Failover
Why it's wrong here
This speeds up failure detection, not graceful shutdown.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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