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Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q58-Q63):

NEW QUESTION # 58
Which two statements are true about EVPN routes for Data Center Interconnect? (Choose two.)

A. Type 5 EVPN routes require a VXLAN tunnel to the protocol next hop.
B. Type 5 EVPN routes do not require a VXLAN tunnel to the protocol next hop.
C. Type 2 EVPN routes require a VXLAN tunnel to the protocol next hop.
D. Type 2 EVPN routes do not require a VXLAN tunnel to the protocol next hop.

Answer: B,D

Explanation:
* Type 2 EVPN Routes:
* Type 2 routesadvertise MAC addresses within an EVPN instance and are used primarily for Layer 2 bridging. These routes do not require a VXLAN tunnel to the protocol next hop because they operate within the same Layer 2 domain.
* Type 5 EVPN Routes:
* Type 5 routesare used to advertise IP prefixes (Layer 3 routes) within EVPN. Similar to Type 2 routes, they do not require a VXLAN tunnel to the protocol next hop because they represent L3 routes, which are managed at the routing layer without the need for VXLAN encapsulation.
Conclusion:
* Option B:Correct-Type 2 routes do not need a VXLAN tunnel to the next hop, as they are used for Layer 2.
* Option D:Correct-Type 5 routes also do not need a VXLAN tunnel because they operate at Layer 3, handling IP prefixes.

NEW QUESTION # 59
Exhibit.

Referring to the exhibit, why is the active source field blank for the entry that uses the 00:0c:29:e8:b7:39 MAC address?

A. The host for this entry is locally connected to leaf1.
B. This entry is associated with a multicast EVPN route.
C. The EVPN route for this host does not have a valid next hop.
D. The ARP lookup for this host has failed.

Answer: A

NEW QUESTION # 60
You are asked to configure telemetry on the OFX Series devices in your data center fabric. You want to use sensors that have a vendor-neutral data model Which type of sensor should you use in this scenario?

A. JTI native sensors
B. Python sensors
C. JTI OpenConfig sensors
D. analog sensors

Answer: C

Explanation:
* Telemetry in Data Centers:
* Telemetry allows for real-time monitoring of network devices by collecting and exporting data such as interface statistics, routing table updates, and other key metrics.
* Vendor-Neutral Data Models:
* Option A:JTI (Junos Telemetry Interface) OpenConfig sensors use a vendor-neutral data model, which is important for ensuring compatibility across different network devices and systems.
OpenConfig is an industry-standard model, which facilitates integration with various telemetry collection systems.
Conclusion:
* Option A:Correct-OpenConfig sensors provide a vendor-neutral solution for telemetry, ensuring broad compatibility and flexibility in data center environments.

NEW QUESTION # 61
You are asked to interconnect two of your company's data centers across the IP backbone. Both data centers have their own unique IP space and do not require any bridging. In this scenario, which two actions would accomplish this task? (Choose two.)

A. Configure a Type 2 EVPN route for each unique prefix.
B. Configure peering for EVPN between all leaf nodes within each data center.
C. Configure a Type 5 EVPN route for each unique prefix.
D. Configure peering for EVPN between border leaf nodes in each data center.

Answer: C,D

Explanation:
* Interconnecting Data Centers:
* The scenario requires interconnecting two data centers with unique IP spaces across an IP backbone. The key point is that bridging is not required, so Layer 3 routing methods must be used.
* EVPN Configuration:
* Option B:Establishing EVPN peering between the border leaf nodes in each data center is the most appropriate solution as it allows for exchanging routing information between the two data centers. This ensures that the routes are properly distributed without the need for L2 bridging.
* Option C:Configuring Type 5 EVPN routes is necessary for advertising IP prefixes (Layer 3 routes) across the EVPN. Type 5 routes allow for the exchange of IP prefixes between the two data centers, enabling the necessary routing functionality without the need for bridging.
Conclusion:
* Option B:Correct-Peering between border leaf nodes sets up the necessary route exchange between data centers.
* Option C:Correct-Type 5 EVPN routes are essential for exchanging Layer 3 prefixes between data centers.

NEW QUESTION # 62
Exhibit.

You are troubleshooting an IP fabric (or your data center. You notice that your traffic is not being load balanced to your spine devices from your leaf devices. Referring to the configuration shown in the exhibit, what must be configured to solve this issue?

A. The load-balance policy must be applied as an export policy to your BGP
B. The load-balance policy must have a from statement that matches on protocol bgp.
C. The load-balance policy must be applied to the forwarding table under the routing-options hierarchy.
D. The multipast multiple -as configuration must be configured for each peer in the BGP spine group.

Answer: C

Explanation:
Step 1: Understand the Configuration in the Exhibit
The exhibit provides three configuration snippets from a leaf device (user@leaf#):
* Policy Options:
user@leaf# show policy-options
policy-statement load-balance {
term 1 {
then {
load-balance per-packet;
}
}
}
* A policy named load-balance is defined, which applies the load-balance per-packet action. In Juniper terminology, per-packet actually means per-flow load balancing (a common point of confusion). This policy is intended to enable load balancing across multiple paths.
* Routing Options:
user@leaf# show routing-options
router-id 192.168.100.11;
autonomous-system 65100;
* The router ID is set to 192.168.100.11, and the autonomous system (AS) number is 65100. There' s no mention of applying the load-balance policy here, which is a clue to the issue.
* BGP Configuration:
user@leaf# show protocols
bgp {
group spine {
type external;
export direct;
local-as 65003;
multipath {
multiple-as;
}
neighbor 172.16.1.5 {
peer-as 65001;
}
neighbor 172.16.1.17 {
peer-as 65002;
}
}
}
* BGP is configured with an external group spine, where the leaf device (local AS 65003) peers with spine devices (AS 65001 and 65002).
* The multipath multiple-as statement is enabled, which allows BGP to install multiple paths for the same prefix in the routing table, even if the paths come from different AS numbers. This is a prerequisite for load balancing in a multi-AS environment like an IP fabric.
* The export direct policy is applied, which likely exports directly connected routes to the spine devices.
Step 2: Identify the Problem
The issue is that traffic from the leaf to the spine devices is not being load-balanced, despite the presence of a load-balance policy and BGP multipath. For load balancing to work in this scenario:
* BGP multipath ensures multiple paths are installed in the routing table.
* The load-balance per-packet policy is meant to distribute traffic across those paths.
* However, the load-balance policy is defined but not applied anywhere in the configuration shown. For load balancing to take effect, the policy must be applied in the correct context.
Step 3: Evaluate the Options
Let's go through each option to determine the correct solution:
* A. The load-balance policy must be applied to the forwarding table under the routing-options hierarchy.
* In Junos, to enable load balancing across multiple paths for forwarding, the load-balance policy must be applied at the forwarding table level. This is done under the routing-options hierarchy using the forwarding-table export statement. For example:
set routing-options forwarding-table export load-balance
* This ensures that the load-balancing policy is applied to the forwarding table, allowing traffic to be distributed across multiple equal-cost paths installed by BGP.
* B. The multipath multiple-as configuration must be configured for each peer in the BGP spine group.
* The multipath multiple-as statement is already configured under the spine group, and it applies to all neighbors in that group (172.16.1.5 and 172.16.1.17). There's no need to configure it per peer, as the group-level configuration is sufficient. This option is incorrect because the required setting is already in place.
* C. The load-balance policy must be applied as an export policy to your BGP.
* Applying the load-balance policy as a BGP export policy (e.g., export load-balance under the BGP group) would affect the routes advertised to the spine devices. However, the load-balance per-packet action is a forwarding action, not a route advertisement action. Applying it as a BGP export policy would not achieve the desired load balancing for traffic forwarding and is incorrect.
* D. The load-balance policy must have a from statement that matches on protocol bgp.
* The load-balance policy currently applies the load-balance per-packet action unconditionally (no from statement). Adding a from protocol bgp condition would make the policy apply only to BGP routes, but this is unnecessary in this context. The policy needs to be applied to the forwarding table to affect traffic, not modified with a from statement. This option doesn't address the core issue of applying the policy.
Step 4: Determine the Correct Answer
The key issue is that the load-balance policy is defined but not applied. For load balancing to work, it must be applied to the forwarding table under routing-options. This matchesOption A:
* A. The load-balance policy must be applied to the forwarding table under the routing-options hierarchy.
Step 5: Provide Official Juniper Documentation Reference
Since I don't have direct access to Juniper's proprietary documents, I can provide an explanation based on standard Junos documentation practices and publicly available resources, such as the Juniper TechLibrary, which is the official source for Junos configuration guides.
In Juniper's official documentation, specifically in theJunos OS Routing Protocols and Policies Configuration Guide, the process for enabling load balancing is described as follows:
* Load Balancing in Junos: To enable per-flow load balancing across multiple paths, you must define a policy with the load-balance per-packet action and apply it to the forwarding table. The relevant configuration hierarchy is:
routing-options {
forwarding-table {
export <policy-name>;
}
}
* Explanation from Documentation: The load-balance per-packet action (which performs per-flow balancing) requires the policy to be applied at the forwarding-table level to influence how traffic is distributed across multiple paths in the forwarding table. Without this, even if BGP installs multiple paths (via multipath), the forwarding engine will not load-balance traffic.
This aligns with the JNCIP-DC exam objectives, which include understanding how to configure and troubleshoot load balancing in an IP fabric, such as applying policies for traffic distribution.

NEW QUESTION # 63
......

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JN0-683 Reliable Study Questions & JN0-683 100% Correct Answers

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Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q58-Q63):

Updated JN0-683 Reliable Study Questions Offer You The Best 100% Correct Answers | Data Center, Professional (JNCIP-DC)

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