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NEW QUESTION # 32
A network engineer is able to ping and traceroute from SD-WAN branch IP 192.168.1.123 to servers in primary data center - DC1, but is unable to ping or traceroute to a server 10.2.2.22 in the newly configured secondary data center, DC2.
The DC2 ION device is advertising the branch IP subnet 192.168.1.0/24 to the DC2 core via eBGP Core Peer. The DC2 data center site has site prefix 10.2.2.0/23 configured.
Which configuration will resolve the issue in this scenario?
Answer: D
Explanation:
Comprehensive and Detailed Explanation at least 150 to 250 words each from Palo Alto Networks SD-WAN Engineer documents:
In a Prisma SD-WAN deployment, the routing of traffic between branches and Data Centers (DCs) relies on the proper synchronization between the AppFabric (the overlay) and the local routing protocols (the underlay/LAN side). In this scenario, the branch can successfully reach DC1, indicating the branch ION is correctly participating in the fabric. However, traffic to DC2 (10.2.2.22) is failing.
The DC2 site has the site prefix 10.2.2.0/23 configured. In Prisma SD-WAN, defining a site prefix informs the Controller that this specific subnet "belongs" to that site, causing the Controller to advertise reachability for this prefix to all other ION devices in the fabric. Consequently, when the branch ION (192.168.1.123) attempts to reach 10.2.2.22, it correctly identifies DC2 as the destination and encapsulates the traffic toward the DC2 ION.
The bottleneck occurs once the packet arrives at the DC2 ION. While the ION is advertising the branch subnet (192.168.1.0/24) to the DC Core (ensuring the return path), the ION itself must know how to forward the incoming traffic from the branch to the internal DC network. If the DC2 ION does not have a specific route in its local routing table for the 10.2.2.0/23 subnet pointing to the DC Core's internal interface, the packet will be dropped.
According to Palo Alto Networks best practices for Data Center ION deployment, a static default route (0.0.0.0/0) should be configured on the ION device pointing toward the DC Core's next-hop IP address. This ensures that any traffic received from the AppFabric destined for internal DC resources-which are not directly connected to the ION-is successfully handed off to the core switching fabric for final delivery. Adding this default route (Option A) resolves the reachability issue by providing the "last-hop" routing instruction within the DC.
NEW QUESTION # 33
A network engineer is able to ping and traceroute from SD-WAN branch IP 192.168.1.123 to servers in primary data center - DC1, but is unable to ping or traceroute to a server 10.2.2.22 in the newly configured secondary data center, DC2.
The DC2 ION device is advertising the branch IP subnet 192.168.1.0/24 to the DC2 core via eBGP Core Peer.
The DC2 data center site has site prefix 10.2.2.0/23 configured.
Which configuration will resolve the issue in this scenario?
Answer: D
Explanation:
In a Prisma SD-WAN deployment, the routing of traffic between branches and Data Centers (DCs) relies on the proper synchronization between the AppFabric (the overlay) and the local routing protocols (the underlay
/LAN side). In this scenario, the branch can successfully reach DC1, indicating the branch ION is correctly participating in the fabric. However, traffic to DC2 (10.2.2.22) is failing.
The DC2 site has the site prefix 10.2.2.0/23 configured. In Prisma SD-WAN, defining a site prefix informs the Controller that this specific subnet "belongs" to that site, causing the Controller to advertise reachability for this prefix to all other ION devices in the fabric. Consequently, when the branch ION (192.168.1.123) attempts to reach 10.2.2.22, it correctly identifies DC2 as the destination and encapsulates the traffic toward the DC2 ION.
The bottleneck occurs once the packet arrives at the DC2 ION. While the ION is advertising the branch subnet (192.168.1.0/24) to the DC Core (ensuring the return path), the ION itself must know how to forward the incoming traffic from the branch to the internal DC network. If the DC2 ION does not have a specific route in its local routing table for the 10.2.2.0/23 subnet pointing to the DC Core's internal interface, the packet will be dropped.
According to Palo Alto Networks best practices for Data Center ION deployment, a static default route (0.0.0.0/0) should be configured on the ION device pointing toward the DC Core's next-hop IP address. This ensures that any traffic received from the AppFabric destined for internal DC resources-which are not directly connected to the ION-is successfully handed off to the core switching fabric for final delivery.
Adding this default route (Option A) resolves the reachability issue by providing the "last-hop" routing instruction within the DC.
NEW QUESTION # 34
A remote branch site is reporting intermittent connectivity to the Data Center. The administrator checks the System > Alarms page and sees a "VPN_DOWN" alarm for the tunnel to the DC. However, the internet circuit status is "Up".
Which specific log file or diagnostic tool in the Prisma SD-WAN portal would provide the IKE (Internet Key Exchange) error codes (e.g., "NO_PROPOSAL_CHOSEN" or "AUTH_FAILED") to pinpoint the cause of the tunnel failure?
Answer: B
Explanation:
Comprehensive and Detailed Explanation
To diagnose specific VPN negotiation failures (Phase 1 or Phase 2 IPSec issues), the Event Logs (specifically filtered for System or VPN events) are the correct resource.
Event Logs: This section records the control plane signaling messages. If a VPN tunnel fails to establish, the Event Log will generate an entry containing the specific IKE failure reason sent by the peer or generated locally. Common errors found here include INVALID_COOKIE, NO_PROPOSAL_CHOSEN (mismatch in encryption algorithms), or PRE_SHARED_KEY_MISMATCH.
Flow Browser (A): This shows user traffic (TCP/UDP sessions). If the VPN is down, user traffic won't even enter the tunnel, so the Flow Browser will just show dropped flows or blackholes, but it won't explain why the tunnel itself is broken.
Link Quality (D): This shows latency/loss graphs for established tunnels. It cannot diagnose why a tunnel failed to form in the first place.
NEW QUESTION # 35
Which IONs can support Branch Gateway?
Answer: C
Explanation:
In the Prisma SD-WAN ecosystem, ION (Instant-On Network) devices are categorized based on their performance capabilities, throughput, and their specific role within the network architecture-namely, whether they function as a Branch device or a Data Center (DC) device.2 The "Branch Gateway" designation typically refers to high-capacity hardware or virtual instances designed to handle complex routing, massive throughput, and high-density connectivity requirements found in large branch offices or regional hubs.
The devices listed in option D represent the high-performance tier of the ION family. The ION 9200 and ION
5200 are flagship hardware appliances designed for large-scale deployments, offering multi-gigabit throughput and extensive port density.3 The ION 3200 serves as a robust mid-to-high range branch solution.4 The ION 7116V is a high-capacity virtual appliance (part of the 7000 series) designed to provide flexible, software-defined gateway capabilities in virtualized environments or public clouds (like AWS, Azure, or GCP).
Specifically, these models support advanced features such as Layer 3 hardware forwarding, integrated switching (in certain sub-models), and the processing power required to run deep packet inspection (DPI) for application-based path selection at scale. While smaller units like the 1200 series are excellent for small-to- medium branches, the 9200, 3200, 5200, and 7116V are the primary workhorses for organizations requiring
"Gateway" class performance to manage heavy traffic loads and maintain high availability in a Prisma SD- WAN fabric.
NEW QUESTION # 36
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 # 37
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