350-401 Question 97
Select 3A network administrator is tasked with configuring Virtual Routing and Forwarding (VRF) on a router to segment traffic for two different customers: CustomerA and CustomerB. The router must ensure that each customer's traffic remains isolated and uses its own routing table. Which of the following steps are necessary to implement VRF correctly?
- A
Create a VRF instance for each customer
- B
Assign interfaces to the appropriate VRF instances
- C
Enable OSPF for each VRF instance
- D
Configure a unique routing protocol instance for each VRF
- E
Assign a global routing table to both VRFs
Show answer and explanation
Correct answers: A, B, D
Explanation
To implement VRF, you must first define a VRF instance for each segment (e.g., each customer). Then, assign interfaces to the respective VRFs to associate traffic with the correct routing table. Finally, configure routing protocols or static routes within each VRF to handle traffic appropriately. Global routing tables are not shared between VRFs, ensuring traffic isolation.
- A. Correct.
Correct: Creating a VRF instance for each customer is necessary to define separate routing tables for CustomerA and CustomerB.
- B. Correct.
Correct: Interfaces must be associated with the appropriate VRF instance to ensure traffic is routed according to the VRF-specific routing table.
- C. Incorrect.
Incorrect: While OSPF can be used with VRFs, enabling OSPF is not strictly necessary unless dynamic routing is required for the VRFs.
- D. Correct.
Correct: Each VRF must have a unique routing protocol instance or manually configured static routes to maintain isolation and manage routing within the VRF.
- E. Incorrect.
Incorrect: Assigning a global routing table would violate the principle of traffic isolation between VRFs.