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| Section | Weight | Objectives |
|---|---|---|
| Data Center Architecture and Security | 5% | - Security features in data center networks - Traffic protection and segmentation |
| VXLAN | 20% | - VXLAN troubleshooting - VXLAN control plane and data plane operation - VXLAN configuration and monitoring |
| Data Center Interconnect | 15% | - EVPN-VXLAN based DCI - Layer 2 and Layer 3 interconnect - Inter-fabric stitching |
| Layer 3 Fabrics | 20% | - IP fabric architecture and design - Fabric scaling and high availability - Routing protocols in IP fabrics |
| EVPN-VXLAN Signaling | 20% | - MAC learning and symmetric routing - CRB and ERB architectures - MBGP for EVPN - EVPN concepts and route types |
| Data Center Deployment and Management | 20% | - Zero Touch Provisioning (ZTP) - Software upgrades and management - Configuration management and automation |
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NEW QUESTION # 54
Exhibit.
You are troubleshooting an IP fabric (or your data center. You notice that your traffic is not being load balanced to your spine devices from your leaf devices. Referring to the configuration shown in the exhibit, what must be configured to solve this issue?
Answer: A
Explanation:
* IP Fabric Load Balancing:
* In the provided configuration, traffic is not being load-balanced to the spine devices. The issue likely relates to how BGP routes are being selected and whether Equal-Cost Multi-Path (ECMP) is functioning correctly.
* Multipath Multiple-AS:
* Option B:The multipath multiple-as configuration is essential when using BGP in an IP fabric where devices belong to different Autonomous Systems (AS). This setting allows BGP to consider multiple paths (even across different AS numbers) as equal cost, enabling ECMP and proper load balancing across spine devices.
Conclusion:
* Option B:Correct-The multipath multiple-as configuration is necessary for achieving ECMP and effective load balancing in a multi-AS BGP environment.
NEW QUESTION # 55
You are asked to build redundant gateways in your EVPN-VXLAN environment, but you must conserve address space because these gateways must span across seven PEs.
What should you implement on the PEs to satisfy these requirements?
Answer: B
Explanation:
In an EVPN-VXLAN environment, when you need redundant gateways across multiple PEs (for hosts in the same VLAN/VRF), you want all PEs to present a single logical gateway IP to the hosts.
This is achieved using anycast IRB:
Same IP address on all PEs โ ensures hosts have a single default gateway.
Same MAC address on all PEs โ ensures traffic is correctly forwarded to the closest PE without ARP conflicts.
This design conserves IP address space because you don't need a unique gateway IP for each PE.
NEW QUESTION # 56
You are asked to identify microburst traffic occurring in the network leading lo packet drops in your data center switches Which two tools would be used in this scenario? (Choose two.)
Answer: C,D
Explanation:
* Identifying Microburst Traffic:
* Microbursts are short spikes in network traffic that can overwhelm buffers and cause packet drops. Detecting and analyzing microbursts is crucial for understanding where packet loss might be occurring in a data center network.
* Port Buffer Monitoring:
* Port Buffer Monitoring:This tool specifically tracks the usage of switch buffers, helping to identify when microbursts are causing buffers to overflow, leading to packet drops.
* Port Mirroring:
* Port Mirroring:This tool allows you to monitor real-time traffic on a specific port by copying the traffic to another port where it can be analyzed, often with a packet analyzer. While port mirroring doesn't directly detect microbursts, it helps capture traffic patterns that can indicate microbursts.
Conclusion:
* Option C:Correct-Port buffer monitoring directly identifies buffer overflows caused by microbursts.
* Option A:Correct-Port mirroring allows for the detailed capture and analysis of traffic patterns, which can reveal microburst behavior.
Options B(Traceoptions) andD(Syslog) are less effective in identifying microburst traffic. Traceoptions focus on control plane traffic debugging, and Syslog is more about logging system events than detecting high- frequency traffic spikes.
NEW QUESTION # 57
Which two requirements are needed to facilitate over-the-top DCI? (Choose two.)
Answer: A,B
Explanation:
All leaf VTEPs in each network must be reachable: In over-the-top Data Center Interconnect (DCI) using EVPN-VXLAN, the leaf VTEPs (VXLAN Tunnel Endpoints) in both data centers need to be reachable from each other. This is crucial for the successful exchange of VXLAN traffic and the proper operation of the overlay network between the data centers.
EVPN route-types must be advertised to all leaf devices: To extend Layer 2 and Layer 3 services seamlessly across data centers in OTT DCI, EVPN route types must be advertised to all leaf devices to maintain the unified control plane and support endpoint reachability.
NEW QUESTION # 58
Click the Exhibit button. Connections between hosts connected to Leaf-1 and Leaf-2 are not working correctly.
Referring to the exhibit, which two configuration changes are required to solve the problem?
(Choose two.)
Answer: C,D
Explanation:
Configure the set switch-options service-id 1 parameter on Leaf-2: The service ID parameter should be consistent between the two leaf switches in order to ensure proper EVPN operation.
The service ID helps to associate the EVPN instance with the correct context. Configuring the same service-id 1on both Leaf-1 and Leaf-2 will allow them to properly intercommunicate.
Configure the set switch-options vrf-target target:65000:55 parameter on Leaf-2: The vrf- targetdefines the routing target for VRF routes in the EVPN context. Since Leaf-1 has vrf- target target:65000:55, Leaf-2 must also have the same VRF target to ensure consistent route propagation between the two switches.
NEW QUESTION # 59
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