350-501 Architecture Practice Question
A service provider is implementing MPLS L3VPN for a customer. The customer requires that routes from two different VPNs be imported into a single VRF. Which feature should be used?
⚠ Common exam trap
Cisco often tests the distinction between RD (uniqueness) and RT (route selection), leading candidates to mistakenly choose RD when the question asks about importing routes from multiple VPNs into one 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
✓
Route Target (RT) import/export
Route Target (RT) import/export is the correct feature because it controls which routes from which VPNs are imported into a given VRF. By configuring multiple RT import statements on a single VRF, the provider can selectively import routes from two different VPNs, enabling inter-VPN route sharing without merging the VPNs themselves.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Route Reflector
Why it's wrong here
Route Reflector is used for BGP scalability, not for importing routes into a VRF.
- ✓
Route Target (RT) import/export
Why this is correct
RT import/export is used to control which routes are imported into a VRF.
- ✗
Route Distinguisher (RD)
Why it's wrong here
RD uniquifies prefixes but does not control import into a VRF.
- ✗
BGP extended community
Why it's wrong here
While RT is a BGP extended community, the feature itself is Route Target.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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