350-501 Architecture Practice Question
Exhibit
vrf definition CUST1 rd 100:1 route-target export 100:1 route-target import 100:1 ! address-family ipv4
Refer to the exhibit. A PE router configuration for VRF CUST1 is shown. What is the most likely result when a CE sends a route with RT 100:100?
⚠ Common exam trap
Cisco often tests the distinction between BGP receiving a route (which always happens) and importing it into a VRF (which requires a matching import RT), leading candidates to mistakenly think any route from a CE is automatically placed into the VRF.
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
✓
The route is received but not imported into VRF
The VRF CUST1 configuration does not include a route-target import statement for RT 100:100. Without a matching import RT, the PE router will receive the route from the CE but will not import it into the VRF. The route is received (BGP update is accepted) but not installed in the VRF routing table, making option D correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The route causes a BGP session reset
Why it's wrong here
A non-matching RT does not cause a session reset.
- ✗
The route is imported and installed in VRF
Why it's wrong here
The import RT does not include 100:100, so the route is not imported.
- ✗
The route is imported but not advertised to other CEs
Why it's wrong here
The route is not imported at all.
- ✓
The route is received but not imported into VRF
Why this is correct
Only routes with matching RT import are imported; RT 100:100 does not match.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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