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| Section | Objectives |
|---|---|
| Topic 1: Data Center Deployment and Management | - Data Center Management Concepts
|
| Topic 2: Layer 3 Fabrics | - Configuration and Troubleshooting
|
| Topic 3: VXLAN | - VXLAN Concepts
|
| Topic 4: Data Center Multitenancy and Security | - Security Concepts
|
| Topic 5: EVPN-VXLAN Signaling | - Configuration and Troubleshooting
|
| Topic 6: Data Center Interconnect | - DCI Concepts
|
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NEW QUESTION # 63
Your company asks you to create a network in one of its data centers specifically for supporting AI or ML workloads. You have chosen to use lossless Ethernet.
In this scenario, which statement about Juniper Networks' best practices for Ethernet networks that support RDMA AI/ML traffic is correct?
Answer: C
Explanation:
In a lossless Ethernet network designed for AI/ML workloads using RDMA (Remote Direct Memory Access), Enhanced Transmission Selection (ETS) is a key feature that helps allocate bandwidth dynamically among different traffic classes, ensuring that AI/ML traffic is prioritized without starving other types of traffic. Juniper Networks' best practices recommend enabling ETS on interfaces connecting to GPU servers to ensure proper bandwidth allocation and prevent congestion.
NEW QUESTION # 64
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?
Answer: C
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 inthe 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 Explanation:
* 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 References:
* 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.
NEW QUESTION # 65
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: A,C
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 # 66
You are deploying a new network lo support your Al workloads on devices that support at least 400 Gbps Ethernet. There is no requirement for any Layer 2 VLANs in this network. Which network architecture would satisfy this requirement?
Answer: B
Explanation:
* Requirements for AI Workloads:
* The scenario requires a network that supports at least 400 Gbps Ethernet and does not require Layer 2 VLANs. This setup is well-suited for a pure Layer 3 network, which can efficiently route traffic between devices without the overhead or complexity of maintaining Layer 2 domains.
* Choosing the Right Network Architecture:
* Option D:An IP fabric using EBGP (External BGP) is ideal for this scenario. In a typical IP fabric, EBGP is used to handle routing between spine and leaf switches, creating a scalable and efficient network. Since there is no need for Layer 2 VLANs, the pure IP fabric design with EBGP provides a straightforward and effective solution.
* Options A, B, and Cinvolve more complex architectures (like VXLAN or EVPN), which are unnecessary when there's no requirement for Layer 2 overlays or VLANs.
Conclusion:
* Option D:Correct-An IP fabric with EBGP is the most suitable and straightforward architecture for a network that needs to support high-speed AI workloads without Layer 2 VLANs.
NEW QUESTION # 67
In your EVPN-VXAN environment, you want to prevent a multihomed server from receiving multiple copies ofBUM traffic in active/active scenarios. Which EVPN route type would satisfy this requirement?
Answer: B
Explanation:
* Understanding the Scenario:
* In an EVPN-VXLAN environment, when using multi-homing in active/active scenarios, there's a risk that a multihomed server might receive duplicate copies of Broadcast, Unknown unicast, and Multicast (BUM) traffic. This is because multiple VTEPs might forward the same BUM traffic to the server.
* EVPN Route Types:
* Type 4 Route (Ethernet Segment Route):This route type is used to advertise the Ethernet Segment (ES) to which the device is connected. It is specifically used in multi-homing scenarios to signal the ES and its associated Ethernet Tag to all the remote VTEPs. The Type 4 route includes information that helps prevent BUM traffic duplication in active/active multi-homing by using a split-horizon mechanism, which ensures that traffic sent to a multihomed device does not get looped back.
* Explanation:
* The Type 4 route is crucial for ensuring that in a multi-homed setup, particularly in an active
/active configuration, BUM traffic does not result in duplication at the server. The route helps coordinate which VTEP is responsible for forwarding the BUM traffic to the server, thereby preventing duplicate traffic.
Data Center References:
* Type 4 routes are essential for managing multi-homing in EVPN to avoid the issues of BUM traffic duplication, which could otherwise lead to inefficiencies and potential network issues.
NEW QUESTION # 68
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