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| Certification Vendor: | VMware |
|---|---|
| Exam Name: | Advanced VMware Cloud Foundation 9.0 Networking |
| Exam Number: | 3V0-25.25 |
| Available Languages: | English |
| Exam Duration: | 135 minutes |
| Real Exam Qty: | 60 |
| Exam Price: | $250 USD |
| Exam Format: | Drag and Drop, Multiple Choice, Multiple Selection, Sequencing, Matching, Build-List |
| Related Certifications: | VMware Certified Advanced Professional - VMware Cloud Foundation Automation VMware Certified Advanced Professional - VMware Cloud Foundation Operations VMware Certified Advanced Professional - VMware Cloud Foundation Storage |
| Passing Score: | 300 (scaled, out of 500) |
| Certificate Validity Period: | 2 years |
| Recommended Training: | VMware Cloud Foundation: Networking Design and Implementation NSX-T Data Center: Advanced Networking and Security |
| Exam Registration: | Broadcom Certification Portal Pearson VUE Registration |
| Sample Questions: | VMware 3V0-25.25 Sample Questions |
| Exam Way: | Online proctored or onsite at authorized test centers |
| Pre Condition: | Recommended: 2–3 years of hands-on experience with VMware Cloud Foundation, vSphere, NSX and enterprise networking; knowledge of SDDC architecture |
| Official Syllabus URL: | https://www.broadcom.com/support/education/vmware/certification/exam/3V0-25.25 |
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NEW QUESTION # 10
When using a DHCP Relay on a segment, which design restriction must be considered?
Answer: C
Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
InVMware Cloud Foundation (VCF)networking, IP address management within an NSX segment can be handled by either the native NSX DHCP server or by an external DHCP server. When an administrator chooses to use an existing external corporate DHCP infrastructure, they must configure aDHCP Relayon the logical segment.
The DHCP Relay works by intercepting the initial DHCP Discover broadcast from a workload VM and forwarding it (as a unicast packet) to the specified IP address of the external DHCP server. However, NSX enforces a strict mutual exclusivity in its configuration logic to prevent conflicts and unpredictable address assignments.
According to the "NSX-T Data Center Administration Guide," once a segment is configured to use aDHCP Relay profile, the native NSX DHCP capabilities for that specific segment are disabled. This means that DHCP settings, DHCP options, and static bindings cannot be configured on that segment(Option A). All such configurations, including IP reservations and scope options (like DNS or NTP), must be managed centrally on the external DHCP server.
Option C is incorrect because the UI will physically grey out or prevent the entry of native DHCP parameters once the Relay is selected. Option B is incorrect as the primary purpose of a Relay is precisely to forward requests to external servers. Option D is incorrect because a DHCP Relay is configured on a per-segment or per-gateway basis; it is not a "global" service that automatically covers all other segments in the network.
Therefore, the architectural trade-off when choosing a Relay is the shift of all management and binding logic to the external physical or virtual DHCP appliance.
NEW QUESTION # 11
An administrator is tasked to configure NSX Federation between separate VMware Cloud Foundation (VCF) Fleets. Which requirement must all sites meet before being added to a Global Manager (GM) for NSX Federation?
Answer: A
NEW QUESTION # 12
An administrator encountered a failure with one of the NSX Managers in a VCF Fleet. The administrator has successfully re-deployed an NSX Manager from SFTP backups. However, after replacing the failed manager node, the new node joins successfully, but the cluster status remains "Degraded".
* The get cluster status command on the leader still shows the old UUID with state "REMOVED".
What is the command to resolve the issue?
Answer: D
Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
In aVMware Cloud Foundation (VCF)environment, the NSX Management Cluster consists of three nodes to ensure high availability and quorum. When a single node fails and is subsequently replaced-either through a manual deployment or an orchestrated recovery viaSDDC Manager-the internal database (Corfu) and the cluster manager must be updated to reflect the current members of the cluster.
When a node is lost or manually deleted from vCenter without being properly decommissioned through the NSX API or CLI, the remaining "Leader" node retains the metadata and theUUIDof that missing member.
Even after a new node joins the cluster and synchronizes data, the cluster state often remains in a"Degraded" status because the control plane still expects a response from the original, failed UUID.
According to NSX troubleshooting and recovery guides, the specific command to purge a stale or defunct member from the cluster configuration isdetach node <UUID>. This command must be executed from the CLI of the current Cluster Leader. By running detach node <old-uuid>, the administrator instructs the cluster manager to permanently remove the record of the failed node from the management plane's membership list.
Option B and C are incorrect because "delete node" is not the primary CLI command used for cluster membership cleanup; "detach" is the specific primitive required to break the logical association. Option A would remove the healthy new node, worsening the situation. Once the stale UUID is detached, the cluster status should transition from "Degraded" to "Stable" as it no longer tries to communicate with the non- existent entity. This process is essential in VCF operations to maintain a healthy "green" status in both the NSX Manager and the SDDC Manager dashboard.
NEW QUESTION # 13
The administrator must configure Border Gateway Protocol (BGP) on the Tier-0 Gateway to establish neighbor relationships with upstream routers. Which two statements describe the Border Gateway Routing Protocol (BGP) configuration on a Tier-0 Gateway? (Choose two.)
Answer: C,D
Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
In the architecture ofVMware Cloud Foundation (VCF)and its networking component, NSX, theTier-0 Gatewayserves as the critical demarcation point between the virtualized overlay network and the physical infrastructure. To facilitate this communication, BGP is the industry-standard protocol utilized.
BGP is fundamentally designed as anExterior Gateway Protocol (EGP). While it can be used internally (iBGP), its primary role in a VCF deployment is to exchange routing information between the SDDC and the physical Top-of-Rack (ToR) switches or core routers (eBGP). This allows the physical network to learn about the virtual subnets (overlay segments) and allows the virtual environment to receive a default route or specific external prefixes. This confirms that BGP is utilized as an EGP in these designs.
Furthermore, as global IP networking has evolved, the traditional 2-byte Autonomous System (AS) numbers (ranging from 1 to 65,535) were found to be insufficient for the number of organizations requiring them.
Modern NSX versions integrated into VCF 5.x and 9.0 fully support4-byte Autonomous System numbers (ranging from 1 to 4,294,967,295). This support is essential for service providers and large enterprises that have been assigned 4-byte ASNs by regional internet registries.
Option A is incorrect because EIGRP is a proprietary Cisco protocol and is not used by NSX. Option C describes OSPF (Open Shortest Path First), which uses "Areas," whereas BGP uses "Autonomous Systems." Therefore, the ability to act as an EGP and support for 4-byte ASNs are the verified characteristics of BGP within the VCF networking stack.
NEW QUESTION # 14
An administrator is troubleshooting an issue where workloads connected to a Tier-1 Gateway named T1-App can no longer reach external North/South destinations.
* The Tier-1 is connected to an Active/Standby Tier-0 Gateway named T0-Prod.
Symptoms observed:
* VMs on segments attached to T1-App can ping each other.
* VMs on T1-App cannot reach any external IP outside T0-Prod.
* From a VM on the segment, ping to the T1-App Distributed Router (DR) IP succeeds.
* Ping from the VM to the T1-App Service Router (SR) fails.
* The Edge cluster hosting the T1-App SR shows both Edge nodes Up and Healthy.
* No failover has occurred - the same Edge node is still shown as Active for T1-App.
What is the most likely cause of this issue?
Answer: A
Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
In theNSXmulti-tier routing architecture used by VCF, aTier-1 Gatewayis composed of two primary components: theDistributed Router (DR)and theService Router (SR). The DR runs as a kernel module on every ESXi host in the transport zone, facilitating East-West traffic. The SR resides on the NSX Edge nodes and provides centralized services like North-South connectivity and stateful services.
Communication between the DR (on the ESXi host) and the SR (on the Edge node) occurs over a hidden internal segment known as theRouter Link. This link is encapsulated inGenevejust like VM-to-VM traffic.
When a VM attempts to reach an external destination, the packet is first routed by the DR on the local host.
The DR then encapsulates the packet and sends it across the overlay to the TEP (Tunnel Endpoint) of the Edge node hosting the SR.
If theMTU (Maximum Transmission Unit)is misconfigured on the physical network or the virtual switches, large encapsulated packets will be dropped. However, small packets (like pings between VMs on the same host) might still succeed. In this scenario, the fact that the VM can ping the local DR butcannot reach the SR
-and therefore cannot reach external networks-points to a failure in the transport between the host and the Edge.
If the Geneve-encapsulated packet containing the ping request to the SR's internal interface exceeds the physical network's MTU, it will fail. Since VCF 5.x/9.0 requires a minimum MTU of1600(ideally9000) for the overlay to account for the Geneve overhead, a mismatch anywhere in the fabric will break the DR-to-SR
"backplane" communication. This prevents the Tier-1 from passing any traffic to its Tier-0 uplink, effectively isolating the workloads from North-South traffic.
NEW QUESTION # 15
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