2V0-41.24 Question 452
Select 3An administrator is facing issues with the NSX-T Edge node not establishing a BGP adjacency with an external router. Initial verification shows that the IP address of the BGP neighbor is correctly configured, and the physical network connectivity is intact. What should the administrator check next to troubleshoot the issue?
- A
Ensure that the BGP neighbor's ASN matches the configuration on the NSX-T Edge node.
- B
Verify that the NSX-T Edge firewall is not blocking BGP (TCP port 179) traffic.
- C
Check if the NSX-T Edge node has sufficient memory resources allocated.
- D
Confirm that the BGP Hold Timer and Keepalive Timer settings match between the NSX-T Edge node and the external router.
- E
Ensure that the Tier-0 Gateway is in an active-active failover mode.
Show answer and explanation
Correct answers: A, B, D
Explanation
BGP adjacency issues are commonly caused by mismatched configuration parameters or network-level blockages. In this scenario, the administrator should verify the ASN configuration, ensure that TCP port 179 is not being blocked, and confirm that the BGP timers match between the peers. These steps address the most likely causes of the problem, as physical connectivity was already verified.
- A. Correct.
If the BGP neighbor's ASN does not match the configuration on the NSX-T Edge node, the adjacency will not establish. This is a critical parameter for BGP peering.
- B. Correct.
The NSX-T Edge firewall could block BGP traffic if the appropriate rules are not configured. TCP port 179 must be open for BGP communication.
- C. Incorrect.
While memory resources are important for overall node performance, they do not directly impact BGP adjacency establishment unless the node is heavily constrained, which is not indicated in this scenario.
- D. Correct.
The BGP Hold Timer and Keepalive Timer settings must match between peers for the adjacency to form. A mismatch in these settings can prevent the BGP session from being established.
- E. Incorrect.
The failover mode of the Tier-0 Gateway is unrelated to BGP adjacency formation. While active-active or active-standby configurations are relevant for other aspects of NSX-T, they do not directly impact this issue.