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NEW QUESTION # 46
What are two potential causes when a secondary public circuit has been added to the branch site, but the Prisma SD-WAN tunnel is not forming to the data center? (Choose two.)
Answer: B,C
Explanation:
In a Prisma SD-WAN deployment, the formation of VPN tunnels between a branch ION device and a Data Center (DC) ION is governed by specific configuration parameters that define how an interface interacts with the WAN fabric. When a secondary public circuit is introduced, the system requires precise classification to initiate the negotiation of security associations.
The first critical factor is the Interface Role. For an ION device to attempt to build a global fabric tunnel over a public circuit, the interface must be explicitly assigned the "Internet" role. If the role is incorrectly set (e.g., as "LAN" or left unconfigured), the device will not treat that physical port as a viable path for the SD- WAN overlay, preventing the tunnel from initiating.
Secondly, the Circuit Label plays a vital role in the path selection and tunnel orchestration logic. Prisma SD- WAN uses labels to match local branch circuits with corresponding circuits at the data center or other branches. If a circuit label is missing or mismatched on the interface configuration, the Controller cannot properly orchestrate the "bind" between the branch and the hub. Without a valid label, the ION device doesn't know which path group the circuit belongs to, and consequently, the automated tunnel signaling process fails to complete.
While DNS is important for management connectivity to the Controller, it is generally not the primary blocker for site-to-site tunnel formation if the Controller reachability is already established via the primary circuit.
Similarly, "Interface Scope" is more relevant to routing advertisement rather than the foundational establishment of the SD-WAN tunnel itself. Therefore, ensuring the Internet role and Circuit Label are correctly applied is the standard troubleshooting step for non-forming tunnels on new circuits.
NEW QUESTION # 47
In a data center (DC) with two ION devices, all of the remote branch Prisma SD-WAN VPNs are active only on DC ION-1.
Why are no VPNs active on DC ION-2?
Answer: B
Explanation:
Comprehensive and Detailed Explanation
In a Prisma SD-WAN Data Center deployment, the operational state of the Secure Fabric VPNs (overlay tunnels) is directly tied to the health of the BGP Core Peer configuration.4 Core Peer Dependency: DC ION devices typically peer with the data center core switch (Core Router) via BGP to learn the subnets (prefixes) for the applications hosted in the DC. The Prisma SD-WAN controller monitors this BGP peering status.5 Controller Logic: If the BGP Core Peer on a DC ION goes down (or is not established), the controller automatically marks the VPN tunnels terminating at that specific ION as "Inactive".6 This is a fail-safe mechanism designed to prevent remote branches from sending traffic to a DC ION that has lost conne7ctivity to the internal data center network (and thus the applications).
Scenario Analysis: In this scenario, DC ION-1 has active VPNs, meaning its BGP Core Peer is UP and it is successfully advertising reachability. DC ION-2 has no active VPNs, which strongly indicates that its BGP Core Peer is down.8 Because the controller sees the peer is down, it suppresses the tunnel establishment or marks existing tunnels as inactive to ensure traffic is only directed to the healthy node (ION-1).
NEW QUESTION # 48
Which configuration requirement must be met to allow two branch ION devices to automatically establish a direct Dynamic VPN (branch-to-branch) connection for traffic flow, bypassing the Data Center?
Answer: B
Explanation:
Comprehensive and Detailed Explanation
Dynamic VPNs (also known as ION-to-ION or Branch-to-Branch VPNs) allow Prisma SD-WAN devices to establish direct, on-demand secure tunnels between branch sites to optimize latency for peer-to-peer traffic (e.
g., VoIP calls between offices).
To enable this capability, the primary architectural requirement is the configuration of VPN Clusters.
A VPN Cluster defines a logical group of devices that are authorized to communicate with one another.
* By default, or if devices are in different clusters without peering, the topology typically defaults to Hub- and-Spoke, where branches only talk to the Data Center.
* When two branch ION devices are placed into the same VPN Cluster (or peered clusters), the controller shares the necessary reachability and cryptographic information between them.
Once in the same cluster, the ION devices monitor traffic. If a user at Branch A tries to contact a server at Branch B, the ION devices detect this interest. If a direct path is available (e.g., via public internet), they will dynamically negotiate a direct VPN tunnel, bypassing the Data Center hub. This offloads the hub and reduces latency. Option B is incorrect because SD-WAN eliminates manual GRE config. Option C is incorrect because dynamic VPNs are a performance feature, not just a disaster recovery feature.
NEW QUESTION # 49
In a Prisma SD-WAN deployment, what is the defining characteristic of a "Standard VPN" compared to a "Secure Fabric Link"?
Answer: C
Explanation:
Comprehensive and Detailed Explanation
In the Prisma SD-WAN architecture, the terminology distinguishes between "Native" automation and "Legacy" interoperability.
Secure Fabric Links: These are the proprietary, automated overlay tunnels created between two Prisma SD-WAN ION devices (e.g., Branch ION to Data Center ION). The controller automatically manages the IP addressing, key rotation, and routing for these links. You do not manually configure "Phase 1" or "Phase 2" parameters for Secure Fabric links.
Standard VPNs: These are traditional, standards-based IPSec tunnels configured to connect an ION device to a Non-ION endpoint (Third-Party Peer). This is used for "Data Center to Data Center" connections where one side is a legacy firewall (e.g., Cisco ASA, Palo Alto Networks NGFW) or for connecting to cloud security services (SSE) that do not have a specific CloudBlade integration. For a Standard VPN, the administrator must manually define the IKE/IPSec profiles, pre-shared keys, and peer IP addresses to match the third-party device's configuration.
NEW QUESTION # 50
An engineer at a managed services provider is updating an application that allows its customers to request firewall changes to also manage SD-WAN. The application will be able to make any approved changes directly to devices via API.
What is a requirement for the application to create SD-WAN interfaces?
Answer: D
Explanation:
In Palo Alto Networks PAN-OS SD-WAN environments, automation and orchestration are key components for service providers managing large-scale deployments. The PAN-OS REST API provides a modern, structured way to programmatically manage configuration objects, including those required for SD-WAN functionality.
When an application is designed to push changes directly to devices (individual firewalls) rather than through a centralized template in Panorama, it must interact with the firewall's local REST API. To successfully create a virtual SD-WAN interface, the application must target the correct resource URI. In the PAN-OS API schema, the logical SD-WAN interface-which groups physical links to enable application-based path selection-is managed via the sdwanInterfaces parameter within the REST API.
It is important to distinguish between the interface itself and the profiles that support it. Option A refers to sdwanInterfaceprofiles, which are the objects used to define the characteristics of a link (such as bandwidth, link type, and monitoring frequency), but not the interface itself. Furthermore, since the scenario specifies making changes "directly to devices," the target must be the firewall rather than Panorama. While Panorama can manage these objects via templates, a direct-to-device automation workflow necessitates using the firewall's REST API endpoint. Utilizing the REST API over the legacy XML API is the recommended standard for modern integrations due to its ease of use with JSON payloads and alignment with contemporary DevSecOps practices. By using the sdwanInterfaces parameter on the firewall, the MSP application can programmatically bind physical Layer 3 interfaces to the SD-WAN fabric.
NEW QUESTION # 51
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