350-501 MPLS and Segment Routing Practice Question
Which component in EVPN is used to uniquely identify an Ethernet segment across multiple PE devices in a multi-homing scenario?
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
✓
ESI
The Ethernet Segment Identifier (ESI) is a 10-byte value that identifies a specific multihomed site.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
RT-2
Why it's wrong here
RT-2 is a route type for MAC/IP advertisement.
- ✗
MAC-VRF
Why it's wrong here
MAC-VRF is the virtual routing and forwarding instance.
- ✓
ESI
Why this is correct
ESI identifies the Ethernet segment.
- ✗
EVI
Why it's wrong here
EVI identifies the EVPN instance.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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