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| Section | Weight | Objectives |
|---|---|---|
| Operations and Monitoring | 38% | - Monitoring and Troubleshooting
|
| Planning and Design | 24% | - Architecture Design
|
| Deployment and Configuration | 38% | - Prisma SD-WAN Deployment
|
>> SD-WAN-Engineer Pruefungssimulationen <<
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46. Frage
An administrator is configuring a BGP peer on a Data Center ION to learn routes from the core switch. The goal is to have the ION learn these prefixes and then advertise them to all remote branch sites across the SD- WAN overlay.
Which setting must be configured on the BGP Peer to ensure these learned routes are redistributed into the SD-WAN fabric?
Antwort: C
Begründung:
Comprehensive and Detailed Explanation
In Prisma SD-WAN routing configuration, the Scope setting on a BGP Peer (or a Static Route) controls the redistribution logic for the prefixes learned from that source.
* Local Scope: If a BGP peer is configured with "Local" scope, the ION device will install the learned routes into its local routing table for its own reachability, but it will not advertise (redistribute) these routes to other ION devices via the Secure Fabric. They remain local to the site.
* Global Scope: To advertise reachability to the rest of the network, the BGP peer must be configured with "Global" scope. This tells the ION that any prefixes learned from this specific neighbor (e.g., the DC Core Switch) should be propagated across the SD-WAN overlay to remote branches. This is the critical setting for enabling branch-to-DC communication for applications hosted behind that BGP peer.
Without "Global" scope, the branches would never learn the routes to the data center subnets.
47. Frage
A network administrator is troubleshooting a critical SaaS application, "SuperSaaSApp", that is experiencing connectivity issues. Initially, the configured active and backup paths for the application were reported as completely down at Layer 3. The Prisma SD-WAN system attempted to route traffic for the application over an L3 failure path that was explicitly configured as a Standard VPN to Prisma Access.
However, users are still reporting a complete outage for the application and monitoring tools show application flows being dropped when attempting to use the Standard VPN L3 failure path, even though the tunnel itself appears to be up. The administrator suspects a policy misconfiguration related to how the Standard VPN path interacts with destination groups.
What is the most likely reason for flows being dropped when attempting to use the Standard VPN L3 failure path?
Antwort: A
Begründung:
Comprehensive and Detailed Explanation
According to Palo Alto Networks Prisma SD-WAN administrator documentation regarding Path Policy configuration, specific rules apply when utilizing Standard VPNs (IPSec tunnels to non-ION devices, such as Prisma Access or third-party firewalls) as an L3 Failure Path.
When a Path Policy rule is configured, the administrator defines Active Paths, Backup Paths, and L3 Failure Paths. The L3 Failure Path is a "last resort" mechanism used when all Active and Backup paths are unavailable (Layer 3 down).
If Standard VPN is selected as the L3 Failure Path type, the system explicitly requires that the administrator also associates it with a specific Standard Services and DC Group within that same policy rule.
The ION device uses the Standard Services and DC Group to identify the specific remote endpoint (tunnel destination) where the traffic should be routed. Unlike a "Direct" (Internet) path which can simply route out to the WAN, a Standard VPN represents a logical tunnel. If the policy rule designates "Standard VPN" as the failure path but leaves the "Standard Services and DC Group" field empty or unselected, the ION effectively has a directive to "use a VPN" but lacks the instruction on which VPN group to use for this specific application context. Consequently, even if the IPSec tunnel to Prisma Access is physically up and stable, the policy engine cannot resolve the next hop for the "SuperSaaSApp" traffic, resulting in the packets being dropped. To resolve this, the administrator must edit the Path Policy rule to ensure the specific Standard Service/DC Group representing Prisma Access is checked/selected for the L3 Failure Path.
48. Frage
Where is route leaking configured between VRFs?
Antwort: B
Begründung:
In the Prisma SD-WAN solution, multi-tenancy and network isolation are achieved through the use of Virtual Routing and Forwarding (VRF) instances. However, there are many operational scenarios-such as providing shared access to a common service (e.g., DNS, NTP) or a central Internet gateway-where traffic must transition between these isolated routing domains. This process is known as route leaking.
In the Prisma SD-WAN management interface, route leaking is specifically configured within the VRF Profile. Unlike traditional CLI-based routers where route leaking might be configured under a global routing table or individual VRF definitions via import/export targets, Prisma SD-WAN utilizes a profile-based approach to ensure scalability and consistency across multiple sites. A VRF Profile acts as a template that defines the routing behavior for specific VRFs across the fabric.
When an administrator navigates to the VRF Profile settings, they can define "Leaking Rules." These rules specify the "From VRF" (source) and "To VRF" (destination) parameters, along with the specific prefixes or default routes that should be shared. By placing this configuration within the VRF Profile rather than a site- specific configuration, Palo Alto Networks allows for a "configure once, apply many" workflow. Once the VRF Profile is updated with the leaking rules, any ION device associated with that profile will automatically update its local routing table to allow the specified inter-VRF communication. This centralized orchestration simplifies the management of complex segmentation requirements in large-scale SD-WAN deployments.
49. Frage
When planning a software upgrade for a large fleet of ION devices, what is the recommended best practice regarding the "Software Version" assigned in the Site Summary?
Antwort: A
Begründung:
Comprehensive and Detailed Explanation
The best practice for managing upgrades in a large-scale Prisma SD-WAN environment is the Canary or Phased Rollout approach, utilizing Site Tags.
* Risk Mitigation: Upgrading all sites simultaneously (Option B) is highly risky. If the new software version has an unforeseen bug or compatibility issue with a specific circuit type, the entire network could face an outage.
* Tag-Based Management: Administrators should create tags such as "Upgrade-Phase-1" (Pilot sites) or
"Region-North". By assigning the specific Software Version to the Tag (rather than the individual site or the global default), the controller pushes the update only to that subset of devices.
* Procedure:
* Apply update to "Pilot" tag (5 sites). Monitor for 24-48 hours.
* Apply update to "Region-1" tag (50 sites). Monitor.
* Eventually, update the Global default once confidence is high.
Option A is unscalable, and Option D is incorrect as the administrator retains full control over when upgrades occur; they are not forced automatically without policy configuration.
50. Frage
A network engineer is troubleshooting a user complaint regarding "slow application performance" for an internal web application. While viewing the Flow Browser in the Prisma SD-WAN portal, the engineer notices that the Server Response Time (SRT) is consistently high (over 500ms), while the Network Transfer Time (NTT) and Round Trip Time (RTT) are low (under 50ms).
What does this data indicate about the root cause of the issue?
Antwort: B
Begründung:
Comprehensive and Detailed Explanation
The Flow Browser and App Response Time metrics in Prisma SD-WAN are critical tools for isolating the fault domain-determining whether a problem lies in the "Network" or the "Application." Network Transfer Time (NTT) / Round Trip Time (RTT): These metrics measure the time it takes for packets to traverse the network (WAN/LAN) and for acknowledgments to return. A low NTT (e.g., <50ms) confirms that the network pipes (SD-WAN overlay, Underlay circuits) are healthy and transporting packets quickly.
Server Response Time (SRT): This metric specifically measures the time between the server receiving a request and the server sending the first byte of the response. It essentially measures the "processing time" of the backend server.
In the scenario described, the network metrics (NTT/RTT) are excellent, effectively ruling out WAN congestion, packet loss, or latency (Option A and C). However, the Server Response Time (SRT) is very high (500ms). This signature is a definitive indicator that the network delivered the request instantly, but the application server took a long time to process it. This points the troubleshooting effort toward the server infrastructure (e.g., a slow SQL query, an overloaded web server, or lack of compute resources) rather than the SD-WAN environment.
51. Frage
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