Free Access to VMware.3V0-25.25.v2026-04-27.q21 with Valid Practice Test (Page 2)

Question 1

An NSX Manager cluster has failed. The administrator deployed a new NSX Manager using the latest version and attempted to restore from a backup, but the restore operation failed. What would an administrator do to recover the cluster?

A.Edit the backup passphrase to match the new build.
B.Use SDDC Manager to replace NSX Manager.
C.Use the NSX restore API instead of the UI.
D.Deploy an NSX Manager that matches the backup's build.

Question 2

An administrator is troubleshooting BGP flapping in a VMware Cloud Foundation (VCF) 9 environment. A Tier-0 Gateway is running in Active/Active mode with two Edge nodes. BFD is enabled on the eBGP sessions to the upstream routers. Each Edge node uses its own uplink IP for BGP. After some network maintenance, one BGP session starts flapping every few minutes. The other BGP sessions stay stable. On the affected Edge node, the command get bfd-sessions shows:
* State: Down
* Diag: Detect Time Expired
Symptoms:
* The upstream router also shows the BFD session as Down with control Detection Time Expired.
* There are no interface errors, no packet loss for normal traffic, and clearing the BFD session temporarily brings it back up - but it flaps again after few minutes.
What is the root cause?

A.BFD timers are mismatched between Tier-0 Gateway and the upstream routers.
B.The MTU does not match on the end-to-end between Tier-0 Gateway and upstream routers.
C.BFD is configured in echo mode on the upstream routers.
D.The Edge nodes are undersized and are experiencing high contention on CPU and drops BFD packets.

Correct Answer: B

Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
In aVMware Cloud Foundation (VCF)environment, particularly with the high-performance requirements of North-South routing,BGPandBFD (Bidirectional Forwarding Detection)are used in tandem to ensure rapid failure detection. A common but subtle issue in fresh or modified environments is anMTU (Maximum Transmission Unit) mismatchon the physical or virtual uplinks.
When BGP establishes a neighborship, it initially exchanges small keepalive packets. These small packets easily pass through interfaces even if there is an MTU mismatch (e.g., the Edge is set to 9000 bytes but a physical switch in the path is limited to 1500 bytes). However, once the BGP state reaches "Established," the routers begin exchanging full routing tables. TheseBGP Updatepackets are often large and will be fragmented or dropped if they exceed the MTU of any hop in the path.
The symptom described-where the session is stable for a few minutes (during the initial handshake) and then flaps-is the hallmark of an MTU issue. The "Detect Time Expired" diagnostic in BFD occurs because the BGP hold timer expires when it fails to receive the large update packets, or the BFD packets themselves are delayed/lost due to the congestion caused by retrying large, failed transmissions. According to VMware NSX troubleshooting documentation, if pings (small packets) succeed but the BGP session fails specifically when traffic load or route counts increase, the MTU should be the first setting verified.
VCF 9.0 and 5.x designs mandate consistent MTU settings (typically9000 MTUfor the overlay and at least
1500+for the uplinks) across the entire path, including the virtual switch (VDS), the Edge VM vNICs, and the physical ToR switches. A mismatch here prevents the completion of the BGP state machine's full synchronization, leading to the cyclic "flapping" observed by the administrator.

Question 3

An administrator must prevent a new VPC from exporting any of its prefixes to the datacenter while still receiving a default route. Where should the routing policy be applied?

A.On the VPC default route advertiser
B.On the VPC's Transit Gateway
C.On the providers' BGP peer template
D.On the VPC Gateway Firewall

Question 4

An administrator has a vSphere 8 Update 1a with NSX 4.1.0.2 environment. What option can the administrator use to converge this vSphere with NSX environment into a VMware Cloud Foundation (VCF) Workload Domain?

A.Use the VCF installer to automatically converge the vSphere with NSX environment into a new VCF Workload Domain.
B.Upgrade NSX to version 9 into the vSphere 8 environment and use the VCF installer to converge the vSphere 8 with NSX environment into a new VCF Workload Domain.
C.Upgrade the environment version and use the VCF installer to converge the vSphere environment into a new VCF Workload Domain.
D.Upgrade the environment and use VCF Operations to converge the vSphere environment into a new VCF Workload Domain.

Question 5

An administrator has observed an NSX Local Manager (LM) outage at the secondary Site. However, the NSX Global Manager (GM) in secondary Site remains operational. What happens to data plane operations and policy enforcement at the secondary site?

A.Only local policies work; global policies cease to apply on the secondary site.
B.The data plane operates normally until LM recovery and reconnection.
C.Secondary site must failover all workloads to Primary site.
D.All traffic is blocked until secondary site LM recovers.

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Question 5

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