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| Section | Weight | Objectives |
|---|---|---|
| Data Center Interconnect | 15% | - Layer 2 and Layer 3 interconnect - EVPN-VXLAN based DCI - Inter-fabric stitching |
| Data Center Deployment and Management | 20% | - Software upgrades and management - Configuration management and automation - Zero Touch Provisioning (ZTP) |
| VXLAN | 20% | - VXLAN control plane and data plane operation - VXLAN configuration and monitoring - VXLAN troubleshooting |
| EVPN-VXLAN Signaling | 20% | - MBGP for EVPN - MAC learning and symmetric routing - CRB and ERB architectures - EVPN concepts and route types |
| Data Center Architecture and Security | 5% | - Security features in data center networks - Traffic protection and segmentation |
| Layer 3 Fabrics | 20% | - Fabric scaling and high availability - Routing protocols in IP fabrics - IP fabric architecture and design |
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NEW QUESTION # 56
Which statement is correct regarding ESI-LAG multihoming in an EVPN-VXLAN fabric?
Answer: B
Explanation:
When a customer edge (CE) device is multihomed to two or more leaf devices using ESI-LAG, all the leaf devices attached to that segment must be configured with the identical Ethernet Segment Identifier (ESI). This common ESI allows the leaf devices to recognize they share the same Ethernet segment and to coordinate designated forwarder election and traffic load balancing, typically in all-active mode, without needing a separate peer link as MC-LAG requires.
NEW QUESTION # 57
You are asked to interconnect Iwo data centers using a method that provides EVPN Type 2 connectivity, is highly scalable, and limits VXLAN tunnels between border leafdevices. What will satisfy these requirements?
Answer: A
Explanation:
* Requirement Analysis:
* The scenario requires a solution to interconnect two data centers that supports EVPN Type 2 connectivity. The solution must be highly scalable and must minimize the number of VXLAN tunnels between border leaf devices.
* Understanding Type 2 Seamless Stitching:
* Option D:Type 2 seamless stitchingis a method used in EVPN to provide Layer 2 connectivity (such as MAC address mobility) across different VXLAN segments. It is scalable because it allows only necessary tunnels to be established between border leaf devices, reducing the overhead of maintaining a full mesh of VXLAN tunnels.
Conclusion:
* Option D:Correct-Type 2 seamless stitching satisfies the requirement by enabling scalable, efficient interconnection of two data centers with minimal VXLAN tunnels.
NEW QUESTION # 58
Exhibit.
You are troubleshooting a DCI connection to another data center The BGP session to the provider is established, but the session to Border-Leaf-2 is not established. Referring to the exhibit, which configuration change should be made to solve the problem?
Answer: A
Explanation:
* Understanding the Configuration:
* The exhibit shows a BGP configuration on a Border-Leaf device. The BGP group UNDERLAY is used for the underlay network, OVERLAY for EVPN signaling, and PROVIDER for connecting to the provider network.
* The OVERLAY group has the accept-remote-nexthop statement, which is designed to accept the next-hop address learned from the remote peer as is, without modifying it.
* Problem Identification:
* The BGP session to Border-Leaf-2 is not established. A common issue in EVPN-VXLAN environments is related to next-hop reachability, especially when accept-remote-nexthop is configured.
* In typical EVPN-VXLAN setups, the next-hop address should be reachable within the overlay network. However, the accept-remote-nexthop can cause issues if the next-hop IP address is not directly reachable or conflicts with the expected behavior in the overlay.
* Corrective Action:
* D. delete protocols bgp group OVERLAY accept-remote-nexthop:Removing this command will ensure that the device uses its own IP address as the next-hop in BGP advertisements, which is standard practice in many EVPN-VXLAN setups. This change should help establish the BGP session with Border-Leaf-2.
Data Center References:
* Proper handling of BGP next-hop attributes is critical in establishing and maintaining stable BGP sessions, especially in complex multi-fabric environments like EVPN-VXLAN. Removing accept- remote-nexthop aligns with best practices in many scenarios.
NEW QUESTION # 59
Exhibit.
You want to enable the border leaf device to send Type 5 routes of local networks to the border leaf device in another data center. What must be changed to the configuration shown in the exhibit to satisfy this requirement?
Answer: A
Explanation:
In this scenario, you want the border leaf device to advertise Type 5 EVPN routes to another border leaf in a different data center. Type 5 routes in EVPN are used to advertise IP prefixes, which means that for proper route advertisement, you need to configure the correct settings within the evpn hierarchy.
Step-by-Step Analysis:
* Understanding EVPN Type 5 Routes:
* EVPN Type 5 routes are used to advertise IP prefixes across EVPN instances, which allow different data centers or networks to exchange routing information effectively.
* VRF Target Setting:
* The vrf-target configuration is crucial because it defines the export and import policies for the VRF within the EVPN instance. For EVPN Type 5 routes to be advertised to other border leaf devices, the vrf-target needs to be correctly configured under the evpn hierarchy, not just within the routing instance.
Command to solve this:
move vrf-target target:65000:1 to evpn
* Other Options:
* Option B:Adding a VLAN configuration would not address the requirement to advertise Type 5 routes.
* Option C:Adding VXLAN encapsulation may be necessary for other scenarios but does not directly address the Type 5 route advertisement.
* Option D:Changing the route-distinguisher will differentiate routes but does not impact the advertisement of Type 5 routes to other data centers.
By moving the vrf-target to the evpn hierarchy, you enable the proper route advertisement, ensuring that the Type 5 routes for local networks are shared with other data center border leaf devices. This is aligned with best practices for multi-data center EVPN implementations, which emphasize the correct placement of routing policies within the EVPN configuration.
NEW QUESTION # 60
Whatare two supported methods (or exporting data when using the Junos telemetry interface? (Choose two.)
Answer: C,D
Explanation:
* Junos Telemetry Interface (JTI):
* The Junos Telemetry Interface is a framework that allows network operators to collect real-time telemetry data from Juniper devices. This data can be used for monitoring, analytics, and network automation.
* Data Export Methods:
* Option B:UDP (User Datagram Protocol)is a lightweight, connectionless protocol used for exporting telemetry data quickly with minimal overhead. While it doesn't guarantee delivery, it is suitable for high-speed data transfer where occasional packet loss is acceptable.
* Option D:gRPC (gRPC Remote Procedure Call)is a modern, high-performance method for data export that supports streaming and remote procedure calls, making it ideal for more complex telemetry data use cases.
Conclusion:
* Option B:Correct-UDP is supported for exporting telemetry data.
* Option D:Correct-gRPC is also supported, offering advanced streaming capabilities
NEW QUESTION # 61
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