Practice Free JN0-480 Exam Online Questions

Question #1

In Juniper Apstra. which statement is correct?

A . VMware anomaly detection is on by default.
B . VMware anomaly detection requires a vCenter server configured under External Systems
C . VMware anomaly detection requires a VMware hypervisor with exports enabled.
D . VMware anomaly detection requires an Apstra server running on VMware.

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Question #2

What does EVPN use lo identity which remote leaf device advertised the EVPN route?

A . a route distinguisher value
B . a community tag
C . a route target value
D . a VRF target value

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Question #3

Exhibit.

Which two statements about ESI values are correct for the server connections to the fabric shown in the exhibit? (Choose two.)

A . A valid ESI value for Server A is 0x00.00.00.00.00.00.00.00.00.00.
B . A valid ESI value for Server B is 0x00.20.20.20.20.20.20.20.20.20.
C . A valid ESI value for Server A is 0x00.10.10.10.10.10.10.10.10.10.
D . A valid ESI value for Server B is 0x00.00.00.00.00.00.00.00.00.00.

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Correct Answer: C D
C D

Explanation:

To answer this question, we need to understand the concept of ESI values in EVPN LAGs. An ESI is a 10-byte value that identifies an Ethernet segment, which is a set of links that connect a multihomed device (such as a server) to one or more PE devices (such as leaf switches) in an EVPN network. The same ESI value must be configured on all the PE devices that connect to the same Ethernet segment. This allows the PE devices to form an EVPN LAG, which supports active-active or active-standby multihoming for the device. The ESI value can be manually configured (type 0) or automatically derived from LACP (type 1) or other methods. In the exhibit, Server A is connected to two leaf switches (QFX 5210) using a LAG with LACP enabled. Server B is connected to three leaf switches (QFX 5120) using a LAG with LACP enabled.

Based on this information, the following statements are correct about ESI values for the server connections to the fabric:

– C. A valid ESI value for Server A is 0x00.10.10.10.10.10.10.10.10.10. This is true because this ESI value can be automatically derived from the LACP configuration on the QFX 5210 devices. The LACP system ID is usually based on the MAC address of the device, and the LACP administrative key is a 2-byte value that identifies the LAG. For example, if the MAC address of the QFX 5210 device is 00:10:10:10:10:10 and the LAG ID is 10, then the LACP system ID is 00:10:10:10:10:10 and the LACP administrative key is 00:0A. The ESI value is then derived by concatenating the LACP system ID and the LACP administrative key, resulting in 00:10:10:10:10:10:00:0A. This ESI value can be represented in hexadecimal notation as 0x00.10.10.10.10.10.00.0A, or padded with zeros as 0x00.10.10.10.10.10.00.0A.00.00. This ESI value must be configured on both QFX 5210 devices that connect to Server A.

– D. A valid ESI value for Server B is 0x00.00.00.00.00.00.00.00.00.00. This is true because this ESI value is a reserved value that indicates a single-homed device. Server B is connected to three leaf switches (QFX 5120) using a LAG, but it is not multihomed to any of them. This means that Server B does not need an ESI value to form an EVPN LAG with any of the leaf switches. Instead, Server B can use the reserved ESI value of 0x00.00.00.00.00.00.00.00.00.00, which indicates that it is a single-homed device and does not participate in any EVPN LAG. This ESI value must be configured on all three QFX 5120 devices that connect to Server B. Thefollowing statements are incorrect about ESI values for the server connections to the fabric:

– A. A valid ESI value for Server A is 0x00.00.00.00.00.00.00.00.00.00. This is false because this ESI value is a reserved value that indicates a single-homed device. Server A is connected to two leaf switches (QFX 5210) using a LAG with LACP enabled, which means that it is multihomed to both of them. This means that Server A needs an ESI value to form an EVPN LAG with the leaf switches. The ESI value must be unique and non-zero for each Ethernet segment, so the reserved ESI value of 0x00.00.00.00.00.00.00.00.00.00 is not valid for Server A.

– B. A valid ESI value for Server B is 0x00.20.20.20.20.20.20.20.20.20. This is false because this ESI value is not derived from the LACP configuration on the QFX 5120 devices. Server B is connected to three leaf switches (QFX 5120) using a LAG with LACP enabled, but it is not multihomed to any of them. This means that Server B does not need an ESI value to form an EVPN LAG with any of the leaf switches. Instead, Server B can use the reserved ESI value of 0x00.00.00.00.00.00.00.00.00.00, which indicates that it is a single-homed device and does not participate in any EVPN LAG. The ESI value of 0x00.20.20.20.20.20.20.20.20.20 is not valid for Server B, and it may cause conflicts with other Ethernet segments that use the same ESI value.

References:

– Ethernet Segment Identifiers, ESI Types, and LACP in EVPN LAGs

– Understanding Automatically Generated ESIs in EVPN Networks

– Ethernet Segment in EVPN: All You Need to Know

Question #4

What are two system-defined user roles that are available in Juniper Apstra? (Choose two.)

A . authorized
B . root
C . viewer
D . user

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Question #5

Which two statements are correct about repairing a Juniper Apstra cabling map before deploying your blueprint? (Choose two.)

A . You must manually change the cabling map to update spine-to-leaf fabric links.
B . Apstra can use LLDP data from the spine-to-lea! fabric devices to update the connections in the cabling map.
C . Apstra can use LLDP data from the leaf devices to update the leaf-to-generic connections in the cabling map.
D . You must manually change the cabling map to update leaf-to-generic links.

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Question #6

You have designed your fabric in Juniper Apstra prior to deploying the network devices.

Which Apstra element in the Staged tab would be used to assist the team that is installing and cabling the devices?

A . Connectivity Templates
B . Virtual Networks table
C . Managed Devices list
D . Links table

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Question #7

Exhibit.

Referring to the exhibit, how do you display the IPv6 subnets lot all of the listed VXLANs?

A . IPv6 subnets ate shown when each VXLAN is selected individually.
B . Select Columns, then select IPv6 Subnet.
C . Select all VXLANs. and the IPv6 Subnets column will appear
D . An IPv6 Subnets column is not shown, indicating that no VXLAN has an assigned IPv6 subnet

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Question #8

You want to add a configuration that is not supported by Juniper Apstra reference architecture using a configlet.

Which two configurations would be applicable in this scenario? (Choose two.)

A . static route configuration
B . policy configuration
C . syslog configuration
D . NTP configuration

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Question #9

Within Managed Devices in the Juniper Apstra Ul, you notice that several devices have the OOS-Quarantined status. The devices cannot be added to any blueprint.

Which action would solve this problem?

A . Acknowledge the device.
B . Fix the hardware issues with the quarantined devices.
C . Install the agent, even though connectivity is established.
D . Upload a new pristine configuration.

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Question #10

Exhibit.

Which two statements ate correct about the graph query output shown in the exhibit? (Choose two.)

A . The interface has an IP address assigned to it.
B . The output shows a LAG connection.
C . The switch in the output is a Juniper device.
D . The interface has tags assigned to it.

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