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| Section | Objectives |
|---|---|
| Topic 1: EVPN-VXLAN Signaling | - Configuration and Troubleshooting
|
| Topic 2: Layer 3 Fabrics | - Configuration and Troubleshooting
|
| Topic 3: VXLAN | - VXLAN Concepts
|
| Topic 4: Data Center Deployment and Management | - Data Center Management Concepts
|
| Topic 5: Data Center Interconnect | - DCI Concepts
|
| Topic 6: Data Center Multitenancy and Security | - Architectures
|
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NEW QUESTION # 86
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 # 87
Which three EVPN split horizon rules will a VTEP implement when receiving BUM traffic from a local host? (Choose three.)
Answer: A,C,D
Explanation:
When a VTEP receives BUM traffic from a local host, it performs normal flooding behavior within the broadcast domain. The frame is replicated to other local interfaces in the same VLAN. It is also replicated to remote VTEPs participating in the same VLAN/VNI for inter-VTEP flooding.
Split-horizon logic prevents sending the flooded frame back out the interface toward the originating host.
NEW QUESTION # 88
Which two statements are correct about EVPN Type 1 routes? (Choose two.)
Answer: A,D
Explanation:
EVPN Type 1 routes, also called Ethernet Auto-Discovery (AD) routes, are advertised per Ethernet Segment and per EVI. They allow a PE device to signal information about a locally attached Ethernet Segment, and when a link to a multihomed segment fails, a single Type 1 route withdrawal (mass withdrawal) can quickly inform remote PEs to redirect traffic, significantly speeding up convergence compared to withdrawing individual MAC routes.
NEW QUESTION # 89
Your organization is implementing EVPN-VXLAN and requires multiple overlapping VLAN-IDs. You decide to use a routing-instance type mac-vrf to satisfy this request.
Which two statements are correct in this scenario? (Choose two.)
Answer: B,D
Explanation:
* Understanding the Scenario:
* EVPN-VXLAN deployments often involve scenarios where multiple tenants or applications require overlapping VLAN IDs, which can be managed using the mac-vrf routing instance type.
This allows you to segregate traffic within the same VLAN ID across different tenants.
* Host-facing Interface Configuration:
* A. Host-facing interfaces must be configured using a service-provider style configuration:
This is correct. In mac-vrf configurations, host-facing interfaces (those connecting end devices) typically follow a service-provider style configuration, where each customer or tenant's traffic is isolated even if overlapping VLAN IDs are used.
* B. Host-facing interfaces must be configured using enterprise-style configuration:This is incorrect for mac-vrf instances because enterprise-style configurations are more common in simpler, less segmented networks.
* Routing Instance Service Type:
* D. The routing-instance service type can be VLAN-based:This is correct. The service type in mac-vrf can indeed be VLAN-based, which is particularly useful in scenarios where VLAN ID overlap is needed between different tenants or services.
Data Center References:
* The mac-vrf instance type is powerful for handling complex multi-tenant environments in EVPN- VXLAN, especially when dealing with overlapping VLAN IDs across different segments of the network.
NEW QUESTION # 90
Why is a designated forwarder required in a multihomed CE-to-PE VXLAN environmentusing EVPN signalling?
Answer: D
Explanation:
* Understanding Multihomed CE-to-PE VXLAN Environment:
* In a VXLAN environment using EVPN signaling, multiple PEs (Provider Edge devices) can be connected to the same CE (Customer Edge device). This setup is referred to as multihoming, where a CE device has multiple connections to the network to ensure redundancy and load balancing.
* Role of the Designated Forwarder:
* The designated forwarder (DF) is a mechanism used in EVPN to manage the forwarding of broadcast, unknown unicast, and multicast (BUM) traffic in a multihomed environment. The DF is selected to ensure that only one of the PEs forwards this type of traffic to the CE, preventing loops and unnecessary duplicate packets.
* Avoiding Duplicate Packets:
* Without a designated forwarder, all PEs connected to a multihomed CE could potentially forward the same packet to the CE, resulting in duplicate packets. This duplication can cause issues with packet processing on the CE, leading to inefficiencies and potential network problems.
Conclusion:
* Option D:Correct-The designated forwarder is essential to prevent duplicate packets from being received on multihomed hosts, ensuring that only one PE forwards BUM traffic to the CE.
NEW QUESTION # 91
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