Online JN0-481 Dumps Help You Understand Questions Well

1. An Automation Engineer is defining a device profile in Juniper Apstra for a new model of leaf switch. The physical switch uses a non-standard naming convention for its 100GbE uplink ports (e.g., `hundred-gig-0/1` instead of `et-0/0/48`).

Which Apstra component is used to map Apstra's internal port identifiers (like `Spine 1 Port 1`) to the actual interface names on the physical device?

2. An automation engineer is managing a large spine-leaf fabric using Juniper Apstra. The engineer needs to apply a non-standard BGP timer configuration to a group of border-leaf switches to improve peering with an external router.

Which Apstra feature should be used to apply this specific, device-level configuration snippet without disrupting the intent-based model for the rest of the fabric?

3. A security administrator is reviewing an EVPN-VXLAN fabric and is concerned about traffic visibility between tenants. The fabric uses a standard spine-leaf architecture with an Edge-Routed Bridging (ERB) overlay. Each tenant is placed in a separate VRF.

A server in Tenant A's web VLAN needs to communicate with a server in Tenant A's database VLAN. Both servers are connected to the same leaf switch.

Where does the Layer 3 routing for this traffic occur, and which EVPN route types are primarily involved for this specific communication flow?

4. An operations engineer needs to deploy a new virtual network for a tenant. The engineer has already staged the change in the Apstra blueprint and is now reviewing the "Uncommitted" tab.

The engineer wants to see the complete, final configuration file that will be present on a leaf switch after the change is committed.

Which configuration view should the engineer select for that device in the "Uncommitted" tab?

5. An Operations Engineer is responsible for integrating the Apstra-managed data center with a centralized logging server (Syslog server). The goal is for all network devices in the fabric to send their system log messages to this central server for archiving and analysis.

How is this typically configured in an Apstra environment?

6. A network architect is designing an IP fabric for a new data center. The requirements are high performance, low latency, and a non-blocking architecture. The data center will initially have 40 racks, with 48 servers per rack. Each server requires a 10 GbE connection. The plan is to use leaf switches with 48x10GbE server-facing ports and 6x100GbE uplink ports.

What is the primary principle of a spine-leaf topology design that meets these requirements?

7. A data center architect has to choose between two common EVPN-VXLAN overlay models for a new fabric: Centrally-Routed Bridging (CRB) and Edge-Routed Bridging (ERB).

In a CRB architecture, where is the Integrated Routing and Bridging (IRB) interface for a given tenant's VLAN located?

8. In a multi-tenant EVPN-VXLAN data center, a security administrator needs to allow a specific shared service (e.g., a DNS server in a "services" VRF) to be accessible by all tenants, while still keeping the tenants isolated from each other.

Which EVPN features and techniques should be used to achieve this controlled route leaking? (Select all that apply.)

9. An automation engineer needs to model a new leaf switch in an Apstra Device Profile. The switch has 48 SFP28 ports that can operate at 10GbE or 25GbE, and 8 QSFP28 ports that can operate at 40GbE or 100GbE.

How does the engineer represent these different port speeds and capabilities within the Apstra model?

10. A DevOps engineer is analyzing traffic patterns in a spine-leaf fabric and is concerned about hash polarization, where certain traffic patterns consistently cause a few links in the ECMP group to be overutilized while others are idle.

Which of the following are common techniques to mitigate hash polarization and improve ECMP load balancing performance? (Select all that apply.)

11. An operations engineer is reviewing the configuration of a leaf switch managed by Apstra. The engineer notices that the configuration contains sections that were generated by Apstra, as well as a section that was manually applied for a special monitoring tool.

What is the term for the original, clean configuration that Apstra stores for the device before any of its own configurations or manual changes are added?

12. An Operations Engineer has been tasked with managing an Apstra-managed fabric. A key part of the daily workflow is to check for any deviations from the intended state.

Which two features in the Apstra UI would be the primary tools for this daily health check? (Choose 2.)

13. An EVPN-VXLAN fabric has two tenant VRFs, `TENANT-BLUE` and `TENANT-RED`. A systems administrator has been asked to configure route leaking so that a specific subnet from `TENANT-BLUE` is available in `TENANT-RED`.

The administrator has configured the following policies.

policy-options {

policy-statement EXPORT-BLUE {

term 1 from protocol bgp;

term 1 then {

community add COMM-BLUE;

accept;

}

}

policy-statement IMPORT-RED {

term 1 from community COMM-BLUE;

term 1 then accept;

term 2 from community COMM-RED;

term 2 then accept;

}

community COMM-BLUE members target:65001:100;

community COMM-RED members target:65001:200;

}

routing-instances {

TENANT-BLUE {

instance-type vrf;

...

vrf-export EXPORT-BLUE;

}

TENANT-RED {

instance-type vrf;

...

vrf-import IMPORT-RED;

vrf-export EXPORT-RED;

}

}

After applying the configuration, the administrator finds that ALL routes from `TENANT-BLUE` are appearing in `TENANT-RED`, not just the specific subnet.

How can the administrator modify the `EXPORT-BLUE` policy to only export the `192.168.10.0/24` subnet?

14. An Automation Engineer needs to onboard a new leaf switch into an Apstra-managed fabric. The switch has been physically racked and cabled, and it is powered on. The switch has a factory-default configuration but is reachable on the management network via an IP address assigned by a DHCP server.

What is the role of the Apstra device agent in the onboarding process?

15. A systems administrator is configuring a new data center fabric with EVPN-VXLAN. For a specific tenant VRF, the administrator needs to ensure that routes from this VRF are advertised to other VTEPs but also that this VRF can receive routes from a shared services VRF located elsewhere in the fabric.

Which combination of `vrf-import` and `vrf-export` policies would achieve this?

16. When planning the total capacity of a new data center fabric, an architect must consider the oversubscription ratio.

What does a 3:1 oversubscription ratio at the leaf layer signify?

17. A DevOps engineer is responsible for managing resource allocation in a large, multi-site Apstra deployment. To avoid IP address and ASN conflicts between sites, the engineer needs to ensure that each site's blueprint uses a unique set of resource pools.

What is the best practice for managing resources in this multi-site scenario? (Choose 2.)

18. A systems administrator is reviewing the tabs at the top of the Apstra Blueprint UI.

Which of the following tabs represents the currently deployed and operational intended state of the network fabric?

19. A network engineer is troubleshooting an EVPN-VXLAN fabric where hosts are unable to communicate with destinations outside the fabric. The fabric uses border leaf switches to connect to an external router.

The engineer checks the local leaf switch connected to a host and confirms it has learned the host's MAC/IP address. However, the `inet.0` table on the local leaf does not contain a default route.

The border leaf switch has the following configuration:

routing-instances {

TENANT-A-VRF {

instance-type vrf;

...

routing-options {

static {

route 0.0.0.0/0 next-hop 172.16.1.1;

}

}

vrf-export EXPORT-DEFAULT-POLICY;

}

}

policy-options {

policy-statement EXPORT-DEFAULT-POLICY {

term 1 from protocol static;

term 1 then {

community add COMM-DEFAULT;

accept;

}

}

community COMM-DEFAULT members target:65001:100;

}

The local leaf switch has a VRF import policy that accepts routes with the community `target:65001:100`.

What is the most likely reason the default route is missing on the local leaf switch?

20. An automation engineer is deploying a spine-leaf fabric using an Apstra blueprint. After completing the physical cabling, the engineer observes that several leaf devices are in the "Out-of-Service" (OOS) state in the Apstra UI. The management network is configured correctly, and the devices are reachable from the Apstra server.

What are the most likely reasons for the devices being in the OOS state? (Choose 2.)

21. An automation engineer is using Apstra to manage a multi-vendor data center. The engineer has created a single, generic template for a 3-stage Clos fabric. The engineer wants to deploy this same template in two different environments: one using Juniper QFX switches and another using Arista switches.

What Apstra components make it possible to use the same generic template for different hardware vendors? (Choose 2.)

22. A Network Engineer is designing the BGP underlay for a new IP fabric. The design must be scalable, easy to manage, and follow Juniper's best practices. The fabric consists of 8 spine switches and 64 leaf switches.

Which BGP configuration strategy should the engineer use for the underlay?

23. A Network Operator needs to apply a set of user-defined labels to several leaf switches in an Apstra blueprint to signify their physical location (e.g., "DataHall-3, Row-B"). This will help with operational workflows and filtering in the UI.

What Apstra feature should the operator use to apply this metadata?

24. A new junior administrator has joined the network team and needs to be granted access to the Apstra server. The security policy dictates that this administrator should only be able to view the fabric's configuration and operational state but not make any changes.

Which Apstra feature is used to enforce this policy?

25. A disaster recovery plan requires active-active Layer 2 adjacency between two data centers. The design uses EVPN multihoming on the border leaf switches to connect to the DCI links. An outage on one of the DCI links to a border leaf in the primary data center occurs.

What mechanism ensures that traffic from the remote data center is immediately redirected to the remaining active border leaf switch in the primary data center? (Choose 2.)

26. A Juniper data center fabric has been successfully deployed and is running under Apstra management. A new security policy requires that all traffic between the web tier and the database tier, which are in different subnets but the same VRF, must be inspected by a firewall.

Following Juniper best practices for service insertion, how should this be implemented in Apstra?

27. A solution architect is designing a new data center fabric using Apstra. The architect has already defined the logical devices, rack types, and overall topology in a Template.

What is the primary purpose of a Template in the Apstra design workflow?