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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: EVPN-VXLAN Signaling | 20% | - MBGP for EVPN - EVPN concepts and route types - MAC learning and symmetric routing - CRB and ERB architectures |
| Topic 2: Layer 3 Fabrics | 20% | - IP fabric architecture and design - Routing protocols in IP fabrics - Fabric scaling and high availability |
| Topic 3: VXLAN | 20% | - VXLAN troubleshooting - VXLAN control plane and data plane operation - VXLAN configuration and monitoring |
| Topic 4: Data Center Interconnect | 15% | - Inter-fabric stitching - Layer 2 and Layer 3 interconnect - EVPN-VXLAN based DCI |
| Topic 5: Data Center Deployment and Management | 20% | - Software upgrades and management - Zero Touch Provisioning (ZTP) - Configuration management and automation |
| Topic 6: Data Center Architecture and Security | 5% | - Traffic protection and segmentation - Security features in data center networks |
>> JN0-683 Valid Test Syllabus <<
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NEW QUESTION # 80
You must integrate several leaf nodes that do not support the EVPN-VXLAN architecture into your existing EVPN-VXLAN-based IP fabric. In this scenario, which two design considerations would accomplish this task? (Choose two.)
Answer: B,D
Explanation:
Edge-routed bridging allows integrating devices that are not EVPN-VXLAN capable by extending Layer 2 at the edge while using routing toward the fabric, enabling those leaves to connect without participating in the EVPN control plane. A collapsed fabric design can place overlay functions on a subset of capable devices while keeping other leaf nodes operating as simpler routed/bridged nodes, allowing coexistence within the same fabric.
NEW QUESTION # 81
Exhibit.
Referring to the exhibit, when Host A sends an ARP request for Host B's IP address, which Junos feature does leaf1 require to send an ARP response back to Host A without having to send a broadcast frame over the fabric?
Answer: B
Explanation:
* Scenario Overview:
* In the exhibit, Host A is trying to resolve Host B's IP address (10.10.1.2) through ARP (Address Resolution Protocol). Normally, an ARP request would be broadcasted over the network, and the host owning the IP address (Host B) would respond.
* Role of Proxy ARP:
* Option A:Proxy ARPallows a router or switch (in this case, leaf1) to respond to ARP requests on behalf of another host. Leaf1, knowing the MAC address of Host B through the EVPN MAC advertisement, can reply to Host A's ARP request directly without broadcasting the request across the entire network fabric. This feature reduces unnecessary traffic and increases network efficiency.
Conclusion:
* Option A:Correct-Proxy ARP enables leaf1 to respond to Host A's ARP request for Host B's IP without broadcasting over the IP fabric, thus providing the ARP response locally.
NEW QUESTION # 82
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.)
Answer: A,B
Explanation:
Configure peering for EVPN between border leaf nodes in each data center: In order to interconnect the data centers across the IP backbone, you would configure EVPN peering between the border leaf nodes in each data center. Border leaf nodes act as the gateway between the local data center and the external network (in this case, the inter-data-center IP backbone). This ensures that the data centers can communicate and exchange routing information.
Configure a Type 5 EVPN route for each unique prefix: Type 5 EVPN routes are used for inter-subnet communication (i.e., for advertising IP prefixes between data centers). Since the data centers have unique IP address spaces and do not require bridging, Type 5 routes are appropriate for advertising these unique prefixes across the data centers.
NEW QUESTION # 83
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.)
Answer: B,C
Explanation:
* Review of the Exhibit:
* The exhibit shows the switch configuration for Leaf-1 and Leaf-2. The configurations include route distinguishers, VRF targets, and service IDs, all of which are crucial for ensuring proper operation in an EVPN-VXLAN environment.
* Service-ID Consistency:
* The service ID must be consistent across all participating leaf devices in the same EVPN instance to ensure that they are part of the same VXLAN overlay network.
* VRF Target Consistency:
* The vrf-target parameter must also be consistent across devices to ensure that VRFs (Virtual Routing and Forwarding instances) are correctly imported and exported between leaf nodes.
Conclusion:
* Option B:Correct-Setting the same service-id on Leaf-2 ensures that it is part of the same VXLAN overlay as Leaf-1.
* Option D:Correct-The vrf-target on Leaf-2 should match Leaf-1 to ensure consistent routing policies and proper route exchange.
NEW QUESTION # 84
You are asked to set up an IP fabric that supports AI or ML workloads. You have chosen to use lossless Ethernet.
In this scenario, which statement is correct about congestion management?
Answer: D
Explanation:
In a lossless Ethernet environment, such as one designed to support AI or ML workloads, ECN (Explicit Congestion Notification) is used to signal congestion to the source device. When congestion occurs in the network, the switch experiencing the congestion marks packets with ECN to notify the source device. This allows the source to adjust its sending rate, helping to avoid further congestion and ensuring that traffic continues to flow efficiently.
NEW QUESTION # 85
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