VALID EXAM JN0-683 BOOK & TOP JN0-683 EXAM DUMPS

Valid Exam JN0-683 Book & Top JN0-683 Exam Dumps

Valid Exam JN0-683 Book & Top JN0-683 Exam Dumps

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Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q65-Q70):

NEW QUESTION # 65
You are implementing seamless stitching between two data centers and have a proposedconfiguration for a border leafdevice.
In this scenario, which two statements are correct? {Choose two.)

  • A. The ESI must be different in each data center.
  • B. The translation-vni must be different in each data center.
  • C. The ESI must match in both data centers.
  • D. The translation-vni must match in both data centers.

Answer: B,C

Explanation:
* Understanding Seamless Stitching:
* Seamless stitching is used in EVPN to interconnect two data centers, allowing for consistent Layer 2 and Layer 3 connectivity across them. This is often achieved by translating VNIs (Virtual Network Identifiers) between the data centers.
* Translation-VNI:
* Option B:The translation VNI must be different in each data center to ensure that traffic can be correctly routed and distinguished as it crosses between the data centers. This differentiation helps to maintain the integrity of the traffic flows and prevents any potential overlap or conflict in VNIs.
* Ethernet Segment Identifier (ESI):
* Option D:The ESI must match in both data centers to ensure that the same Ethernet segment (which could be multihomed) is recognized consistently across the data centers. Matching ESIs are crucial for maintaining a unified view of the Ethernet segment across the interconnected fabric.
Conclusion:
* Option B:Correct-Translation VNIs must be unique to each data center for proper traffic distinction.
* Option D:Correct-Matching ESIs are necessary to maintain consistent Ethernet segment identification across both data centers.


NEW QUESTION # 66
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 to the forwarding table under the routing-options hierarchy.
  • B. The load-balance policy must be applied as an export policy to your BGP
  • C. The multipast multiple -as configuration must be configured for each peer in the BGP spine group.
  • D. The load-balance policy must have a from statement that matches on protocol bgp.

Answer: A

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 # 67
You are deploying an IP fabric using EBGP and notice that your leaf devices are advertising and receiving all the routes. However, the routes are not installed in the routing table and are marked as hidden.
Which two statements describe how to solve the issue? (Choose two.)

  • A. You need to configure as-override.
  • B. You need to configure multipath multiple-as.
  • C. You need to configure a next-hop self policy.
  • D. You need to configure loops 2.

Answer: B,D


NEW QUESTION # 68
You are asked to automatically provision new Juniper Networks devices in your network with minimal manual intervention Before you begin, which two statements are correct? (Choose two.)

  • A. You must have a system log (syslog) server to manage system log messages and alerts.
  • B. You must have a DHCP server that provides the location of the software image and configuration files.
  • C. You must have an NTP server to perform time synchronization.
  • D. You must have a file server that stores software image and configuration files.

Answer: B,D

Explanation:
* Zero-Touch Provisioning (ZTP):
* ZTP is a feature that allows for the automatic provisioning of devices with minimal manual intervention. It is widely used in large-scale deployments to quickly bring new devices online.
* Key Requirements for ZTP:
* A. DHCP Server:A DHCP server is crucial for ZTP as it provides the necessary information to new devices, such as the IP address, the location of the software image, and configuration files.
* D. File Server:The file server is where the software image and configuration files are stored. The device downloads these files during the provisioning process.
* Incorrect Options:
* B. Syslog Server:While a syslog server is important for logging and monitoring, it is not a requirement for the initial provisioning process.
* C. NTP Server:An NTP server is used for time synchronization, which is essential for accurate logging and operation but not specifically required for ZTP.
Data Center References:
* ZTP simplifies the deployment process by automating the initial configuration steps, relying heavily on DHCP for communication and a file server for delivering the necessary configuration and software.


NEW QUESTION # 69
Exhibit.

Referring to the exhibit, Host1 (10.1.1.1) is failing to communicate with Host2 (10.1.2.1) in a data center that uses an ERB architecture. What do you determine from the output?

  • A. The traffic is entering the VXLAN tunnel.
  • B. The traffic is failing because load balancing is not configured correctly.
  • C. Host1 and Host2 are directly connected to leaf1.
  • D. The irb.20 interface is not configured on leaf1.

Answer: A

Explanation:
Understanding the Problem:
* Host1 (10.1.1.1) is failing to communicate with Host2 (10.1.2.1) within an EVPN-VXLAN environment using ERB architecture.
Analysis of the Exhibit:
* The provided output includes information from the show route forwarding-table matching command for IP 10.1.2.1. The next hop is shown as vtep.32769, which indicates that the traffic destined for 10.1.2.1 is being forwarded into the VXLAN tunnel with the correct VTEP (VXLAN Tunnel Endpoint).
Conclusion:
* Option B:Correct-The traffic from Host1 is entering the VXLAN tunnel, as evidenced by the next hop pointing to a VTEP. However, the issue could lie elsewhere, possibly with the remote VTEP, routing configurations, or the receiving leaf/spine devices.


NEW QUESTION # 70
......

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