2V0-41.24 Question 330
Select 2An organization is configuring a Tier-0 Gateway with BGP in an NSX environment to provide routing for external networks. The network administrator needs to ensure that the Tier-0 Gateway can establish BGP peering with an upstream router. Which of the following configurations are necessary to successfully establish a BGP session?
- A
Configure a Local AS (Autonomous System) number for the Tier-0 Gateway.
- B
Enable Route Redistribution on the Tier-0 Gateway.
- C
Add the IP address of the upstream router as a BGP neighbor.
- D
Enable ECMP (Equal-Cost Multi-Pathing) on the Tier-0 Gateway.
- E
Configure BGP Graceful Restart on the Tier-0 Gateway.
Show answer and explanation
Correct answers: A, C
Explanation
To establish a BGP session, the Tier-0 Gateway must have a Local AS number configured and the upstream router's IP address added as a BGP neighbor. These configurations enable the basic BGP peering process. Other features like route redistribution, ECMP, or Graceful Restart are additional functionalities but are not required for the initial BGP session establishment.
- A. Correct.
Correct. A Local AS number is required for the Tier-0 Gateway to participate in BGP. Without it, BGP peering cannot be established.
- B. Incorrect.
Incorrect. While route redistribution allows the Tier-0 Gateway to advertise routes, it is not required for establishing the BGP session itself.
- C. Correct.
Correct. The upstream router's IP address must be added as a BGP neighbor for the peering to establish successfully.
- D. Incorrect.
Incorrect. ECMP is used for load balancing traffic across multiple paths, but it is not a requirement for establishing a BGP session.
- E. Incorrect.
Incorrect. BGP Graceful Restart is an optional feature that allows for session continuity during failures but is not necessary for the initial BGP peering setup.