Data Center Professional Exam Questions PDF download

QUESTION: 6

Exhibit.

Connections between hosts connected to Leaf-1 and Leaf-2 are not working correctly.

Referring to the exhibit, which two configuration changes are required to solve the problem? (Choose two.)
Configure the set switch-options vtep-source-interface irb.0 parameter on Leaf-1.
Configure the set switch-options vrf-target target:65000:l parameteron Leaf-2.
Configure the set switch-options route-distinguisher i92.168.100.50:i parameter on Leaf-1.
Configure the set switch-options service-id 1 parameter on Leaf-2.

Answer(s): C,E

Explanation:

Issue Analysis:
The problem in the exhibit suggests a mismatch in configuration parameters between Leaf-1 and Leaf-2, leading to communication issues between hosts connected to these leaf devices.
Configuration Mismatches:
Service-ID: Leaf-1 has service-id 1 configured, while Leaf-2 does not have this parameter. For consistency and proper operation, the service-id should be the same across both leaf devices. VRF Target: Leaf-1 is configured with vrf-target target:65000:1, while Leaf-2 is configured with vrf- target target:65000:2. To allow proper VRF import/export between the two leafs, these should match.
Corrective Actions:
C . Configure the set switch-options vrf-target target:65000:1 parameter on Leaf-2: This aligns the VRF targets between the two leaf devices, ensuring they can correctly import and export routes. E . Configure the set switch-options service-id 1 parameter on Leaf-2: This ensures that both Leaf-1 and Leaf-2 use the same service ID, which is necessary for consistency in the EVPN-VXLAN setup.
Data Center

Reference:

Correct configuration of VRF targets and service IDs is critical in EVPN-VXLAN setups to ensure that routes and services are correctly shared and recognized between different devices in the network fabric.

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QUESTION: 7

What are three actions available tor MAC move limiting? (Choose three.)

drop
filter
enable
log
shutdown

Answer(s): A,D,E

Explanation:

MAC Move Limiting:
MAC move limiting is a security feature used in network switches to detect and mitigate rapid changes in MAC address locations, which could indicate a network issue or an attack such as MAC flapping or spoofing.
When a MAC address is learned on a different interface than it was previously learned, the switch can take various actions to prevent potential issues.
Available Actions:
A . drop: This action drops packets from the MAC address if it violates the move limit, effectively blocking communication from the offending MAC address. D . log: This action logs the MAC move event without disrupting traffic, allowing network administrators to monitor and investigate the event.
E . shutdown: This action shuts down the interface on which the MAC address violation occurred, effectively stopping all traffic on that interface to prevent further issues.
Other Actions (Not Correct):
B . filter: Filtering is not typically associated with MAC move limiting; it generally refers to applying ACLs or other mechanisms to filter traffic.
C . enable: This is not an action related to MAC move limiting, as it does not represent a specific reaction to a MAC move event.
Data Center

Reference:

MAC move limiting is crucial for maintaining network stability and security, particularly in environments with dynamic or large-scale Layer 2 networks where MAC addresses might frequently change locations.

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QUESTION: 8

Exhibit.

Referring to the exhibit, the spinel device has an underlay BGP group that is configured to peer with its neighbors' directly connected interfaces.
Which two statements are true in this scenario? (Choose two.)

The multihop statement is not required to establish the underlay BGP sessions.
Load balancing for the underlay is not configured correctly.
The multihop statement is required to establish the underlay BGP sessions.
Load balancing for the underlay is configured correctly.

Answer(s): A,D

Explanation:

Understanding BGP Configuration in the Exhibit:
The exhibit shows a BGP configuration on spine1 with a group named underlay, configured to peer with directly connected interfaces of other devices in the network. Multipath multiple-as: This statement allows the router to install multiple paths in the routing table for routes learned from different ASes, facilitating load balancing.
Key Statements:
A . The multihop statement is not required to establish the underlay BGP sessions: In this case, the BGP peers are directly connected (as indicated by their neighbor IP addresses), so the multihop statement is unnecessary. Multihop is typically used when BGP peers are not directly connected and packets need to traverse multiple hops.
D . Load balancing for the underlay is configured correctly: The multipath { multiple-as; } statement in the configuration enables load balancing across multiple paths from different autonomous systems, which is appropriate for underlay networks in data center fabrics.
Incorrect Statements:

C . The multihop statement is required to establish the underlay BGP sessions: This is incorrect because the peers are directly connected, making the multihop statement unnecessary. B . Load balancing for the underlay is not configured correctly: This is incorrect because the configuration includes the necessary multipath settings for load balancing.
Data Center

Reference:

BGP configurations in EVPN-VXLAN underlay networks are crucial for ensuring redundancy, load balancing, and efficient route propagation across the data center fabric.

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QUESTION: 9

You want to provide a OCI that keeps each data center routing domain isolated, while also supporting translation of VNIs.
Which DCI scheme allows these features?

MPLS DCI label exchange
over the top (OTT) with VNI translation enabled
VXLAN stitching
over the top (OTT) with proxy gateways

Answer(s): C

Explanation:

Understanding DCI (Data Center Interconnect) Schemes:
DCI schemes are used to connect multiple data centers, enabling seamless communication and resource sharing between them. The choice of DCI depends on the specific requirements, such as isolation, VNI translation, or routing domain separation.
VXLAN Stitching:
VXLAN stitching involves connecting multiple VXLAN segments, allowing VNIs (VXLAN Network Identifiers) from different segments to communicate with each other while maintaining separate routing domains.
This approach is particularly effective for keeping routing domains isolated while supporting VNI translation, making it ideal for scenarios where you need to connect different data centers or networks without merging their control planes.
Other Options:
A . MPLS DCI label exchange: This option typically focuses on MPLS-based interconnections and does not inherently support VNI translation or isolation in the context of VXLAN.

B . Over the top (OTT) with VNI translation enabled: This could support VNI translation but does not inherently ensure routing domain isolation.
D . Over the top (OTT) with proxy gateways: This typically involves using external gateways for traffic routing and may not directly support VNI translation or isolation in the same way as VXLAN stitching.
Data Center

Reference:

VXLAN stitching is a powerful method in multi-data center environments, allowing for flexibility in connecting various VXLAN segments while preserving network isolation and supporting complex interconnect requirements.

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QUESTION: 10

Exhibit.

Given the configuration shown in the exhibit, why has the next hop remained the same for the EVPN routes advertised to the peer 203.0.113.2?

EVPN routes cannot have the next hop changed.
The export policy is incorrectly configured.
The vrf-export parameter must be applied.
The vpn-apply-export parameter must be applied to this peer.

Answer(s): D

Explanation:

Understanding the Configuration:
The configuration shown in the exhibit involves an EVPN (Ethernet VPN) setup using BGP as the routing protocol. The export policy named CHANGE_NH is applied to the BGP group evpn-peer,

which includes a rule to change the next hop for routes that match the policy.
Issue with Next Hop Not Changing:
The policy CHANGE_NH is correctly configured to change the next hop to 203.0.113.10 for the matching routes. However, the next hop remains unchanged when advertising EVPN routes to the peer 203.0.113.2.
Reason for the Issue:
In Junos OS, when exporting routes for VPNs (including EVPN), the next-hop change defined in a policy will not take effect unless the vpn-apply-export parameter is used in the BGP configuration. This parameter ensures that the export policy is applied specifically to VPN routes. The vpn-apply-export parameter must be included to apply the next-hop change to EVPN routes.
Correct Answer
D . The vpn-apply-export parameter must be applied to this peer: This is the correct solution because the next hop in EVPN routes won't be altered without this parameter in the BGP configuration. It instructs the BGP process to apply the export policy to the EVPN routes.
Data Center

Reference:

This behavior is standard in EVPN deployments with Juniper Networks devices, where the export policies applied to VPN routes require explicit invocation using vpn-apply-export to take effect.

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Juniper Data Center Professional JN0-683 Dumps in PDF

Free Juniper JN0-683 Real Questions (page: 12)

QUESTION: 6

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QUESTION: 7

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QUESTION: 8

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QUESTION: 9

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QUESTION: 10

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