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| Section | Objectives |
|---|---|
| Topic 1: EVPN-VXLAN Signaling | - Configuration and Troubleshooting
|
| Topic 2: Data Center Multitenancy and Security | - Architectures
|
| Topic 3: Data Center Interconnect | - DCI Concepts
|
| Topic 4: VXLAN | - VXLAN Concepts
|
| Topic 5: Layer 3 Fabrics | - IP Fabric Concepts
|
| Topic 6: Data Center Deployment and Management | - Data Center Management Concepts
|
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NEW QUESTION # 99
Which three statements are correct about symmetric IRB routing with EVPN Type 2 routes? (Choose three.)
Answer: B,C,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 # 100
You are deploying a Clos IP fabric with an oversubscription ratio of 3:1.
In this scenario, which two statements are correct? (Choose two.)
Answer: A,C
Explanation:
* Understanding Oversubscription in a Clos Fabric:
* The oversubscription ratio in a Clos IP fabric measures the ratio of the amount of edge (leaf) bandwidth to the core (spine) bandwidth. An oversubscription ratio of 3:1 means that there is three times more edge bandwidth compared to core bandwidth.
* Impact of Adding/Removing Spine Devices:
* Option C:If youremove spine devices, the total available core bandwidth decreases, while the edge bandwidth remains the same. This results in anincrease in the oversubscription ratio because there is now less core bandwidth to handle the same amount of edge traffic.
* Option B:Conversely, if youadd spine devices, the total core bandwidth increases. This decreases the oversubscription ratio because more core bandwidth is available to handle the edge traffic.
Conclusion:
* Option C:Correct-Removing spine devices increases the oversubscription ratio.
* Option B:Correct-Adding spine devices decreases the oversubscription ratio.
NEW QUESTION # 101
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: C
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 # 102
You want to convert an MX Series router from a VXLAN Layer 2 gateway to a VXLAN Layer 3 gateway for VNI 100. You have already configured an IRB interface.
In this scenario, which command would you use to accomplish this task?
Answer: C
Explanation:
To convert the VXLAN Layer 2 gateway to a VXLAN Layer 3 gateway for VNI 100, you need to assign the IRB interface (which is configured for Layer 3 routing) to the relevant bridge domain.
This is accomplished with the command set bridge-domains VLAN-100 routing-interface irb.100.
This command links the IRB interface (irb.100) to the bridge domain (VLAN-100) and enables Layer 3 routing for that VNI.
NEW QUESTION # 103
You are using a single tenant data center with a bridged overlay architecture. In this scenario, how do hosts of the different virtual networks communicate with each other?
Answer: A
Explanation:
In a single-tenant data center using a bridged overlay architecture, virtual networks (VLANs) are typically isolated within the fabric, with traffic between these VLANs handled outside the fabric.
off-fabric using an external device: In many bridged overlay architectures, communication between different virtual networks is handled off-fabric, often using an external router or firewall that connects the different VLANs. The fabric itself primarily provides Layer 2 connectivity within each VLAN, leaving inter-VLAN routing to be handled externally.
This design is common in smaller or simpler data center environments where a single tenant does not require complex on-fabric routing and prefers to handle inter-VLAN routing through dedicated devices.
NEW QUESTION # 104
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