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| Section | Objectives |
|---|---|
| Topic 1: Configuration and Deployment | - WAN Interface Configuration - Initial Setup and Provisioning - Network Segmentation (VLANs, Zones) |
| Topic 2: Policy Configuration | - Application and Traffic Policy - Security Policy Integration - QoS and Traffic Engineering |
| Topic 3: Prisma SD-WAN Architecture and Components | - Controllers and ION Devices - Prisma SD-WAN Solution Overview - Data Center and Branch Architecture |
| Topic 4: Monitoring and Troubleshooting | - Dashboard and Analytics - Troubleshooting Methodology - Logs and System Health |
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質問 # 45
Which troubleshooting action should be taken when resources at one branch site can reach the internet but cannot be reached from the data center (DC)?
正解：C
解説：
In the Prisma SD-WAN architecture, reachability between sites is managed by the Control Plane, which automatically advertises prefixes across the secure fabric based on their scope. If a branch site has successful Direct Internet Access (DIA) but is invisible to the Data Center (DC), it indicates that while the local ION is online, its internal network information has not been propagated to the rest of the SD-WAN fabric.
The most common cause for this behavior is that the LAN interfaces or static routes at the branch are configured with a Local scope rather than a Global scope. When a prefix is set to "Local," the ION device treats that network as reachable only within that specific site; it will not advertise that prefix to the Controller for distribution to other ION devices, such as those at the Data Center. By ensuring the LAN branch prefixes are set to "global" (Option B), the administrator instructs the ION device to share these routes with the global fabric.
Once the prefix is marked as global, the Prisma SD-WAN Controller identifies it as a reachable destination and updates the routing tables of all peer ION devices in the same domain, including the DC gateways. This allows the Data Center to build a valid path to the branch resources over the secure VPN tunnels. Options like creating static routes (Option A) or changing site modes (Option C) do not address the fundamental requirement of prefix advertisement within the software-defined fabric, which relies on correctly defined metadata like route scope.
質問 # 46
A network design mandates segmentation at the routing level and traffic isolation across various services, such as teller cash registers, ATM traffic, guest Wi-Fi, and corporate applications. Which command can be used to validate and display the Virtual Routing and Forwarding (VRF) route leak rules?
正解：A
解説：
In complex retail or banking environments, maintaining strict network segmentation is a regulatory and security requirement. Prisma SD-WAN utilizes Virtual Routing and Forwarding (VRF) to provide this isolation, ensuring that high-security traffic, such as ATM transactions or teller cash registers, remains logically separated from Guest Wi-Fi or general corporate applications. While isolation is the default state, route leaking is used to allow specific communication between these VRFs-for instance, allowing multiple isolated segments to reach a common shared service like a DNS server or a centralized security gateway.
To verify that these configurations have been correctly pushed from the Controller to the local ION device, administrators utilize the ION CLI (Command Line Interface) for deep-dive diagnostics. The command inspect vrf route_leak_rule all is the definitive tool for this purpose. Unlike "show" commands which typically provide interface status, "inspect" commands in the Prisma SD-WAN ecosystem are designed to pull real-time operational state data from the control plane's internal databases.
When executed, this command displays the specific prefix-level rules that allow routes to "leak" from one VRF table into another. It provides visibility into the source VRF, the destination VRF, and the exact network prefixes or default routes being shared. This is critical for troubleshooting "Day 2" operations; if a teller register cannot reach a shared database, the administrator can use this command to confirm if the necessary route leak rule is active and accurately reflecting the intent of the VRF Profile configured in the portal.
Without this command, verifying inter-VRF reachability would be limited to trial-and-error connectivity tests, making it an essential part of the Prisma SD-WAN engineer's toolkit.
質問 # 47
Where is route leaking configured between VRFs?
正解：C
解説：
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.
質問 # 48
Based on the HA topology image below, which two statements describe the end-state when power is removed from the ION 1200-S labeled "Active", assuming that the ION labeled "Standby" becomes the active ION?
(Choose two.)
正解：A、B
解説：
Comprehensive and Detailed Explanation
This scenario depicts a High Availability (HA) topology utilizing the ION 1200-S model's Fail-to-Wire (bypass) capabilities to share WAN links between two devices without needing external switches for every WAN connection.
1. WAN Link Availability (Statement A):
The diagram illustrates a "daisy-chain" cabling method supported by the ION 1200-S bypass pairs.
* ISP A (Green): Connects directly to the "Standby" (Left) unit first. Since the Standby unit remains powered on, it maintains direct access to ISP A.
* LTE/5G (Blue): Connects to the "Active" (Right) unit first. The connection then loops through a bypass pair on the Active unit to the Standby unit. When power is removed from the "Active" unit, the fail-to-wire relays on its Ethernet ports close physically. This creates a passive electrical bridge that connects the LTE modem directly to the Standby unit. The Standby unit (now becoming Active) will detect the link state change and successfully utilize the LTE connection. Therefore, both WAN links remain usable.
2. LAN Failover Mechanism (Statement C):
Prisma SD-WAN ION devices typically use a VRRP-like mechanism for LAN redundancy.
* When the "Active" node fails (loses power), the "Standby" node stops receiving keepalives and promotes itself to the Active state.
* To ensure downstream switches and clients immediately send traffic to the new Active unit, it must update their ARP tables. It does this by broadcasting a Gratuitous ARP (GARP) packet for the Virtual IP (VIP) address of the Switch Virtual Interfaces (SVIs). This action informs the network that the MAC address associated with the Gateway I1P is now reachable via the port connected to the new Active ION.234
質問 # 49
A network operator receives a critical SITE_CONNECTIVITY_DOWN alarm for a branch site in the Prisma SD-WAN portal.
What specific condition triggers this alarm type?
正解：D
解説：
Comprehensive and Detailed Explanation
The SITE_CONNECTIVITY_DOWN alarm is a high-severity alert indicating a total loss of overlay connectivity for a site.
It does not trigger if just one circuit fails (Option B), provided that other circuits are still up and maintaining VPNs. A single link failure would typically trigger a "Link Down" or "VPN Down" alarm, but the Site connectivity would remain "Up" (degraded).
It does not simply mean the device rebooted (Option A), although a reboot would cause it temporarily; the alarm specifically tracks the state of the VPN fabric.
The SITE_CONNECTIVITY_DOWN alarm specifically generates when all Secure Fabric Links (VPN tunnels) on the device are in the "Down" state. This means the branch is completely isolated from the rest of the SD-WAN network (Data Centers and other branches), even if the device itself might still be powered on and reachable via the controller (management plane). It signifies a "Blackout" of the data plane for that location.
質問 # 50
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無料でクラウドストレージから最新のMogiExam SD-WAN-Engineer PDFダンプをダウンロードする：https://drive.google.com/open?id=10-48uwfD2rM09hqtrCiKKS3i4BGpoieW