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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Center Multitenancy | 10% | - Multitenant design
|
| Topic 2: Data Center Architectures | 20% | - IP Fabrics
|
| Topic 3: Apstra Design Phase | 15% | - Configuration and validation
|
| Topic 4: Juniper Apstra Architecture | 15% | - Core components
|
| Topic 5: Blueprint Operations | 15% | - Troubleshooting
|
| Topic 6: Intent-Based Analytics | 10% | - Analytics features
|
| Topic 7: Apstra Build and Deploy Phases | 15% | - Fabric deployment
|
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NEW QUESTION # 78
You want to remove a leaf device from a Juniper Apstra blueprint permanently. What is the correct high-level sequence of steps?
Answer: B
Explanation:
To safely and permanently remove a leaf device from a Juniper Apstra blueprint, the device should first be set to Drain mode to gracefully move traffic away from it, then transitioned to Undeploy mode to remove its configuration from the device. Once undeployed, the device can be safely removed from the blueprint without causing disruption to the rest of the fabric.
NEW QUESTION # 79
You are asked to deploy a collapsed fabric architecture. Which two statements are correct about this deployment? (Choose two.)
Answer: A,D
Explanation:
In Apstra, a collapsed fabric (also described as "spineless") consolidates traditional fabric tiers so that the primary fabric devices perform combined roles. Instead of a dedicated spine tier providing transit between leafs, the fabric is formed by leaf devices connected directly to each other using mesh links. This means a collapsed fabric uses a full-mesh topology at the leaf level, replacing the usual leaf-to-spine connections found in a three-stage Clos. Therefore, the statement that leaf devices are full-mesh connected is correct.
Because the collapsed fabric devices serve the fabric roles, they also provide the EVPN-VXLAN overlay functions (VTEP behavior, EVPN control-plane participation, and VXLAN encapsulation/decapsulation) necessary for tenant segmentation and service delivery. Juniper's collapsed fabric validated designs further describe the collapsed fabric switches as serving all fabric roles (including border-leaf behaviors when external connectivity is required), reinforcing that overlay functions reside on these fabric leaf devices.
The remaining statements are not generally true for the collapsed fabric definition. Top-of-rack (access) switches-when present in certain collapsed designs-are not defined by default as full-mesh connected, and VXLAN support is not a requirement for those TOR/access switches unless the specific architecture explicitly uses them as VTEPs. The defining characteristics are the consolidated fabric roles and the leaf-level full-mesh.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra5.0/apstra-user-guide/topics/concept/templates.html
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/concept/rack-types.html
https://www.juniper.net/documentation/us/en/software/jvd/jvd-collapsed-dc-fabric-with-apstra/jvd-collapsed-dc-fabric-with-apstra.pdf
NEW QUESTION # 80
Which fabric type should be chosen in a template to create a five-stage Clos?
Answer: A
Explanation:
A five-stage Clos architecture allows for large-scale topologies with an additional aggregation layer that interconnects multiple pods into a single fabric. A pod is a group of racks that share the same spine devices. A rack is a group of leaf devices that connect to the same servers. To create a five-stage Clos network using Juniper Apstra, you need to choose the pod-based fabric type in the template creation wizard. This will allow you to specify the number of pods, planes, spines, and leaves for your network design.
NEW QUESTION # 81
What is the purpose of a Juniper Apstra rack?
Answer: A
Explanation:
A Juniper Apstra rack is a physical entity that contains one or more network devices, such as leaf nodes, access switches, or generic systems. A rack is used to organize and manage the network devices in the Apstra software application. A rack has the following characteristics:
It stores information on how leaf nodes connect to generic devices. This is because a rack can include generic systems, which are devices that are not managed by Juniper Apstra, but are connected to the network. A generic system can be a server, a firewall, a load balancer, or any other device that has a network interface. A rack stores the information on how the leaf nodes, which are the devices that provide access to the end hosts, connect to the generic devices, such as the port number, the link speed, the LAG mode, and the roles1.
It has a rack type, which defines the type and number of leaf devices, access switches, and/or generic systems that are used in the rack. A rack type is a resource that is created in the data center design phase, and it does not specify the vendor or the model of the devices. A rack type can be predefined or custom-made, and it can be used to create multiple racks with the same structure and configuration2.
It has a rack build, which assigns the specific vendor and model of the devices to the rack. A rack build is created in the staged phase, and it uses the rack type as a template. A rack build can also assign the resources, such as the IP addresses, the ASNs, and the VNIs, to the devices in the rack3.
It has a rack deployment, which applies the network configuration and services to the devices in the rack. A rack deployment is performed in the active phase, and it uses the rack build as a reference. A rack deployment can also monitor the network performance and compliance of the devices in the rack4.
The following three statements are incorrect in this scenario:
It stores information on how pods connect to super spines. This is not true, because a rack does not store any information on the pod or the super spine level of the network. A pod is a cluster of leaf and spine devices that form a 3-stage Clos topology, and a super spine is a device that connects multiple pods in a 5-stage Clos topology. A rack only stores information on the leaf and the access level of the network1.
It stores IP address and ASN pool information. This is not true, because a rack does not store any information on the IP address and ASN pools. IP address and ASN pools are resources that are created in the data center design phase, and they contain a range of IP addresses and ASNs that can be assigned to the devices and the virtual networks. A rack only uses the IP address and ASN pools to assign the resources to the devices in the rack build2.
It stores device port data rates and vendor information. This is not true, because a rack does not store any information on the device port data rates and vendor information. The device port data rates and vendor information are specified in the rack build, which assigns the specific vendor and model of the devices to the rack. A rack only uses the rack build to apply the network configuration and services to the devices in the rack deployment3.
Reference:
Racks (Staged)
Rack Types (Datacenter Design)
Rack Builds (Staged)
Racks (Active)
NEW QUESTION # 82
You are performing an upgrade to your switches in your network. You want to ensure that the upgrade can be performed without interrupting traffic. In the Juniper Apstra UI, which deploy mode should be used to accomplish this task?
Answer: C
Explanation:
In Apstra, Deploy Mode = Drain is the operational mechanism used to gracefully remove a switch from active forwarding before performing maintenance such as an OS upgrade. Drain mode is specifically intended to drain traffic while preserving fabric stability, so that maintenance can be executed with minimal to no application impact, provided the fabric design has sufficient redundancy (for example, ECMP in the underlay and dual-homing/ESI for server attachments). In an EVPN-VXLAN IP fabric, taking a leaf or spine abruptly out of service can cause transient loss of reachability as underlay adjacencies reconverge and the overlay recalculates paths. By placing the device into Drain, Apstra adjusts intent so that traffic is shifted away from the device as much as possible, reducing dependency on it before the upgrade begins.
This is different from Undeploy, which removes Apstra-rendered configuration and is generally used for decommissioning; if a device is carrying traffic, Apstra guidance is to drain first. Ready is a pre-deploy state used in lifecycle workflows, not a maintenance traffic-shifting mode. Deploy keeps the device fully participating. Therefore, for a maintenance window where the goal is "upgrade with minimal interruption," the correct mode is Drain, then perform the Junos v24.4 upgrade, and finally return the device to Deploy.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-drain-mode/apstra-drain-mode.pdf
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/topic-map/deploy-mode-update-datacenter.html
https://www.juniper.net/documentation/us/en/software/apstra6.0/apstra-user-guide/topics/topic-map/device-config-lifecycle.html
NEW QUESTION # 83
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