350-501 Networking Practice Question
An SP network uses MPLS to provide IPv6 connectivity over an IPv4 backbone using 6PE. Which BGP extension is required on the provider edge routers to exchange IPv6 prefixes with an IPv4 next-hop?
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 multiprotocol extensions (MP-BGP) with IPv6 address family
6PE uses BGP multiprotocol extensions (MP-BGP) with an AFI of 2 (IPv6) and SAFI of 1 (unicast), and the next-hop is encoded as an IPv4 address using the 'next-hop' attribute.
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 multiprotocol extensions (MP-BGP) with IPv6 address family
Why this is correct
MP-BGP with IPv6 unicast address family allows carrying IPv6 routes with IPv4 next-hop.
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BGP route reflection
Why it's wrong here
Route reflection is for iBGP scalability, not for IPv6 transport.
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BGP confederation
Why it's wrong here
Confederation is for reducing iBGP mesh, not for IPv6.
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BGP prefix-independent convergence (PIC)
Why it's wrong here
PIC is for fast convergence, not for IPv6 prefix exchange.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.