350-501 Architecture Practice Question
A provider is implementing EVPN for data center interconnect. They require multi-homing with all-active load balancing and fast convergence using BGP. Which EVPN feature enables this?
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
✓
Ethernet Segment Identifier (ESI)
EVPN uses Ethernet Segment Identifier (ESI) for multi-homing. All-active mode allows load balancing across multiple PE nodes, and BGP control plane provides fast convergence via route withdrawal.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
MPLS Traffic Engineering
Why it's wrong here
MPLS-TE is for path optimization, not multi-homing.
- ✓
Ethernet Segment Identifier (ESI)
Why this is correct
Correct. ESI identifies the multi-homed segment and enables all-active load balancing.
- ✗
BGP Link-State
Why it's wrong here
BGP-LS is for traffic engineering, not multi-homing.
- ✗
VPLS with BGP autodiscovery
Why it's wrong here
VPLS does not support all-active multi-homing natively.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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