350-501 MPLS and Segment Routing Practice Question
An engineer is configuring EVPN IRB (Integrated Routing and Bridging) to provide IP connectivity between tenants across a service provider network. Which THREE components are essential for EVPN IRB operation? (Choose three.)
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
✓
IP-VRF for each tenant.
EVPN IRB requires an IP-VRF to represent the tenant, a bridge domain (EVI) for Layer 2, and IRB interfaces (Layer 3 gateway) that connect the bridge domain to the VRF. BGP EVPN control plane is also needed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
LDP or SR for label distribution.
Why it's wrong here
EVPN uses BGP; MPLS labels are distributed via BGP.
- ✓
IP-VRF for each tenant.
Why this is correct
Essential for routing.
- ✓
An IRB interface (BDI) that serves as the Layer 3 gateway.
Why this is correct
Essential.
- ✗
MPLS-TE tunnels for transport.
Why it's wrong here
Not essential; any transport works.
- ✓
Ethernet VPN Instance (EVI) with a Route Distinguisher.
Why this is correct
Needed for MAC advertisement.
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JA
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.