300-610 practice question 9 of 35

A large financial institution hosts all customer data in a critical data center with a single physical location Top management is concerned about the…

A large financial institution hosts all customer data in a critical data center with a single physical location Top management is concerned about the risk of a single-site failure. Dot budget is also an issue, so the network engineering team is working to implement a cost-effective redundancy strategy with a second data center. The new data center must use a three-tier design Identical to the existing data center. Business requirements dictate that all data must always be accessible from anywhere in the world, even It a single site fails. The team purchased two Cisco Nexus 7700 Series Switches and four Catalyst 8000 Series Routers. Which action must the team take to accomplish the goal?

Answer options

A: Implement NVGRE on the Catalyst 8000 routers to create a DCI communication channel between the data centers and provide Layer 2 extension capabilities.

B: Implement OTV with the Nexus 7700 Series devices to extend Layer 2 connectivity between the two data centers and provide disaster-recovery capabilities. Correct answer

C: Implement FabricPath on the Catalyst 8000 routers in both data centers to provide full redundancy in the event of a disaster. D. Implement HSRP with the Nexus 7700 Series devices to provide gateway redundancy to ensure seamless failover between the Nexus switches.

Correct Answer:

B. Implement OTV with the Nexus 7700 Series devices to extend Layer 2 connectivity between the two data centers and provide disaster-recovery capabilities.

Explanation

The goal is to implement a cost-effective disaster recovery solution by extending Layer 2 connectivity between two data centers. Overlay Transport Virtualization (OTV) is a Cisco DCI technology specifically designed for this purpose. It encapsulates Layer 2 frames in IP packets to transport them across any IP network. The Cisco Nexus 7700 Series switches are high-performance data center platforms that fully support OTV, making them the ideal hardware to act as the OTV edge devices. This solution directly addresses the need for L2 extension and disaster recovery capabilities using the specified equipment.

Why Incorrect

A. Implement NVGRE on the Catalyst 8000 routers: NVGRE is a less common overlay than VXLAN, and Catalyst routers are typically WAN edge devices, not the primary DCI L2 extension platform.
C. Implement FabricPath on the Catalyst 8000 routers: FabricPath is a technology for building a loop-free, multipath Layer 2 fabric within a single data center, not for DCI.
D. Implement HSRP with the Nexus 7700 Series devices: HSRP provides first-hop gateway redundancy within a VLAN. It is not a DCI technology and does not extend connectivity between sites.

References

1. Cisco, "Cisco Nexus 7000 Series NX-OS OTV Configuration Guide," Configuration Guides. "Overlay Transport Virtualization (OTV) is an IP-based feature that provides Layer 2 extension capabilities over any transport IP network. OTV is a MAC-in-IP method that extends Layer 2 connectivity across a transport network." (Chapter: Information About OTV)

2. Cisco, "Cisco Nexus 7700 Platform Switches Data Sheet," Data Sheets. The data sheet lists "Overlay Transport Virtualization (OTV)" as a key supported software feature under the "Data Center Interconnect" section, confirming platform capability.

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