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| Section | Objectives |
|---|---|
| VXLAN | - Configuration and Troubleshooting
|
| Data Center Multitenancy and Security | - Architectures
|
| Data Center Deployment and Management | - Data Center Deployment Concepts
|
| Data Center Interconnect | - DCI Concepts
|
| Layer 3 Fabrics | - IP Fabric Concepts
|
| EVPN-VXLAN Signaling | - Configuration and Troubleshooting
|
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NEW QUESTION # 84
In a Junos EVPN-VXLAN fabric, which underlay routing protocol is most commonly recommended for a large-scale IP fabric due to its scalability and fast convergence?
Answer: B
Explanation:
External BGP (EBGP) is the most commonly recommended underlay protocol for large-scale Clos-based IP fabrics because it scales well with a large number of devices, provides granular routing policy control, and offers predictable, fast convergence when each device is assigned its own autonomous system number in a single-hop EBGP design between leaf and spine devices.
NEW QUESTION # 85
Exhibit.
Referring to the exhibit, which statement Is true?
Answer: C
Explanation:
* Understanding Network Architectures:
* ERB (Edge Routed Bridging) architecture involves routing at the network's edge (leaf nodes), while traffic between leaf nodes is switched. This is commonly used in VXLAN-EVPN setups.
* Analysis of the Exhibit:
* The exhibit shows configurations related to routing instances, VXLAN, and VLANs, with VNIs being used for each VLAN. This setup is characteristic of an ERB architecture where each leaf device handles Layer 3 routing for its connected devices.
Conclusion:
* Option B:Correct-The configuration shown corresponds to an ERB architecture where routing occurs at the network's edge (leaf devices).
NEW QUESTION # 86
Which three statements are correct about symmetric IRB routing with EVPN Type 2 routes? (Choose three.)
Answer: A,B,E
Explanation:
* Symmetric IRB Routing with EVPN Type 2 Routes:
* Symmetric Routing: In symmetric IRB (Integrated Routing and Bridging), routing occurs in both directions at the ingress and egress leaf nodes using the same routing logic. This is contrasted with asymmetric routing, where different routing logic is used depending on the direction of the traffic.
* Required Components:
* Option A:An L3 IRB interface is necessary for each VLAN that participates in routing, as it handles the Layer 3 processing for the VLAN.
* Option B:MAC-VRF is required for symmetric routing to maintain a mapping of MAC addresses to the appropriate VRF, ensuring correct forwarding within the EVPN.
* Option D:A transit VNI (Virtual Network Identifier) is required for each VRF to encapsulate the Layer 3 traffic as it traverses the network, allowing the IP traffic to be appropriately forwarded.
Conclusion:
* Option A:Correct-Each local VLAN needs an IRB interface for L3 processing.
* Option B:Correct-MAC-VRF is necessary for handling MAC address resolution in symmetric routing.
* Option D:Correct-Transit VNIs are required for routing VRF-specific traffic across the network.
OptionsCandEare incorrect because:
* C:Symmetric routing can work with various VLAN models, including single or multiple VLANs within an EVPN instance.
* E:Symmetric routing is generally more efficient than asymmetric routing as it uses consistent routing logic in both directions.
NEW QUESTION # 87
You are designing an IP fabricfora large data center, and you are concerned about growth and scalability.
Which two actions would you take to address these concerns? (Choose two.)
Answer: A,D
NEW QUESTION # 88
You are asked to set up an IP fabric thatsupports Al or ML workloads. You have chosen to use lossless Ethernet in this scenario, which statement is correct about congestion management?
Answer: C
Explanation:
* Understanding Lossless Ethernet and Congestion Management:
* Lossless Ethernet is crucial for AI and ML workloads, where packet loss can significantly degrade performance. To implement lossless Ethernet, congestion management protocols like ECN (Explicit Congestion Notification) are used.
* Role of ECN in Congestion Management:
* Option A:In an IP fabric that supports lossless Ethernet, when a switch experiences congestion, it can mark packets using ECN. This marking notifies the source device of the congestion, allowing the source to reduce its transmission rate, thereby preventing packet loss.
Conclusion:
* Option A:Correct-The switch experiencing congestion notifies the source device via ECN marking.
NEW QUESTION # 89
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