350-401 Question 376
Select 3An enterprise network engineer is tasked with segmenting traffic for different departments using VRF-Lite. The engineer has created three VRFs (Sales, HR, and IT) and assigned interfaces to the respective VRFs. After configuration, the engineer notices that there is no connectivity between the devices in the same VRF. Which of the following steps should the engineer take to resolve this issue?
- A
Ensure that the interfaces assigned to the VRFs are in an 'up/up' state.
- B
Verify that the correct IP address is assigned to each interface in the VRF.
- C
Ensure that a route distinguisher (RD) is configured for each VRF.
- D
Verify that static routes or a routing protocol is configured within each VRF.
- E
Ensure that VRF import and export route targets (RTs) are configured.
Show answer and explanation
Correct answers: A, B, D
Explanation
In VRF-Lite, connectivity issues within the same VRF can occur if the interfaces are not operational ('up/up'), if IP addressing is incorrect, or if no routing is configured within the VRF. Route distinguishers (RDs) and route targets (RTs) are not applicable to VRF-Lite as they are specific to MPLS VPNs.
- A. Correct.
Interfaces assigned to VRFs must be in an 'up/up' state for the VRF to forward traffic. If they are down, traffic will not flow.
- B. Correct.
Each interface in a VRF must have a proper IP address assigned. Without correct addressing, devices in the same VRF cannot communicate.
- C. Incorrect.
Route distinguishers (RDs) are not required for VRF-Lite. They are primarily used in MPLS VPNs to differentiate routes between VRFs.
- D. Correct.
Routing (static or dynamic) must be configured within each VRF to ensure connectivity between devices in the same VRF.
- E. Incorrect.
Route targets (RTs) are not used in VRF-Lite. They are relevant for MPLS VPNs to manage route import/export between VRFs.