350-501 Security and Services Practice Question
An SP engineer is configuring BGP Graceful Shutdown (GSHUT) for maintenance on a router. What does the GSHUT community do to the BGP best path selection process?
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
✓
It sets the local preference to 0
BGP GSHUT uses a well-known community (0xFFFF0000) that lowers the local preference by 100 (to 0 by default) to make the routes less preferred, thus draining traffic gracefully.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It prepends the AS path
Why it's wrong here
AS path prepending is not part of GSHUT.
- ✗
It removes the route from the BGP table
Why it's wrong here
GSHUT does not withdraw routes; it makes them less preferred.
- ✗
It increases the MED value by 100
Why it's wrong here
GSHUT affects local preference, not MED.
- ✓
It sets the local preference to 0
Why this is correct
The GSHUT community reduces local preference, making the route less preferred.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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