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300-410 Practice Question: Which TWO configuration steps are required to…
Which TWO configuration steps are required to troubleshoot and fix a BGP route that is not being advertised to an EBGP neighbor due to the next-hop-self issue? (Choose TWO.)
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
✓
Apply the neighbor next-hop-self command under the BGP router configuration for the EBGP neighbor.
The next-hop-self command on the EBGP neighbor or the IBGP peer (if the route is from IBGP) ensures the next hop is set to the local router's address. Alternatively, if the next hop is reachable via an IGP, no change is needed. Option A is incorrect because network statements do not affect next-hop. Option C is incorrect because EBGP multihop is for TTL issues. Option E is incorrect because the update-source command sets the source IP, not the next hop.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure a network statement under BGP to advertise the prefix.
Why it's wrong here
Network statements advertise prefixes but do not fix next-hop issues.
- ✓
Apply the neighbor next-hop-self command under the BGP router configuration for the EBGP neighbor.
Why this is correct
This forces the router to use its own IP as the next hop for routes advertised to the neighbor.
- ✗
Increase the EBGP multihop TTL using the neighbor ebgp-multihop command.
Why it's wrong here
This addresses TTL issues, not next-hop reachability.
- ✓
Ensure the next-hop IP is reachable via an IGP or static route on the advertising router.
Why this is correct
If the next hop is reachable, the route can be advertised without modification.
- ✗
Use the neighbor update-source command to change the source IP of BGP updates.
Why it's wrong here
This changes the source IP, not the next-hop attribute.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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