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NEW QUESTION # 40
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 # 41
Which Juniper Apstra feature allows an administrator to inject custom CLI configuration that is not natively supported by the Apstra intent-based model?
Answer: A
Explanation:
Configlets in Juniper Apstra allow administrators to insert custom, vendor-specific CLI configuration snippets into the rendered device configuration. This is useful for features or settings not natively modeled by Apstra's intent-based system, ensuring that required configuration can still be applied consistently across devices in the blueprint.
NEW QUESTION # 42
You are asked to deploy a collapsed fabric architecture. Which two statements are correct about this deployment? (Choose two.)
Answer: B,C
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 # 43
What are three port group roles that you are allowed to assign to a logical device? (Choose three.)
Answer: A,B,E
Explanation:
In Apstra, a logical device abstracts a physical switch's front-panel layout into one or more panels containing port groups. Each port group has a defined speed and one or more roles that describe how those ports are expected to be used in the fabric. These roles are essential because they constrain where ports may be consumed during rack type and template construction (for example, spine-facing vs server-facing vs generic connectivity).
Apstra-supported port group roles include fabric roles such as Spine and Leaf, and endpoint-facing roles such as Generic (commonly used for ports that connect to servers or external generic systems). Assigning Leaf and Spine roles ensures Apstra can correctly validate and render intent for uplinks and interconnects in a three-stage Clos or larger topologies. Assigning Generic indicates ports that can be used for non-fabric connections (such as server links, external routers modeled as generic systems, or other non-managed endpoints).
The options Empty and Root are not valid Apstra port group roles in the logical device model; Apstra uses other explicit role names (for example, Access, Peer, Unused, Generic, Leaf, Spine, Superspine depending on design type and version). In Junos v24.4 EVPN-VXLAN fabrics, getting these roles correct is foundational because Apstra relies on them to place underlay and overlay configuration onto the right interfaces with predictable results.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/concept/logical-devices.html
https://www.juniper.net/documentation/us/en/software/jvd/jvd-collapsed-dc-fabric-juniper-apstra-access-switches/configuration_walkthrough.html
NEW QUESTION # 44
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: B
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 # 45
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