hardMultiple SelectObjective-mapped
300-410 Practice Question: An engineer must prevent a VRF on a PE router…
An engineer must prevent a VRF on a PE router from learning routes from a specific remote site in an MPLS L3VPN. Which TWO configuration changes on the local PE can achieve this? (Choose TWO.)
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
✓
Remove the import RT that corresponds to the remote site's export RT from the VRF configuration.
To block routes from a specific remote site, the engineer can either remove the import RT that matches the remote site's export RT, or configure a route map with a 'match ip address' clause to deny specific prefixes and apply it to the import direction. Removing the export RT from the local VRF would affect how the local site's routes are advertised, not what is received. Changing the RD does not affect route acceptance. The 'neighbor ... default-originate' command is unrelated to filtering VPNv4 routes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Remove the import RT that corresponds to the remote site's export RT from the VRF configuration.
Why this is correct
Correct. Without a matching import RT, the PE will not install the remote site's VPNv4 routes into the VRF.
- ✗
Remove the export RT from the VRF configuration.
Why it's wrong here
Incorrect. The export RT controls how the local VRF's routes are advertised to other PEs, not what is received.
- ✓
Apply a route map with a 'match ip address' prefix-list to the VRF's import direction to deny the remote site's prefixes.
Why this is correct
Correct. A route map applied to the import direction can filter specific prefixes using a prefix-list.
- ✗
Change the Route Distinguisher (RD) of the VRF to a different value.
Why it's wrong here
Incorrect. The RD does not affect route filtering; it only makes prefixes unique.
- ✗
Configure 'neighbor <remote-PE> default-originate' under the VRF address-family.
Why it's wrong here
Incorrect. This command injects a default route, it does not filter specific routes.
Go deeper
Related to this question
Learn chapter
OSPF Neighbor Adjacency and Basics
Key term
MP-BGP for VPN
MP-BGP for VPN is an extension of the Border Gateway Protocol that carries multiple types of network layer information to enable scalable, isolated virtual private networks over a shared provider infrastructure.
Key term
MPLS Layer 3 VPN
A technology that uses Multiprotocol Label Switching to create secure, scalable virtual private networks that connect multiple sites at the network layer, where the service provider manages routing between customer sites.
About these practice questions
This 300-410 question is part of Courseiva's 1,966-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 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 300-410 exam.