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300-610 · Question #285

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, but budget is also

The correct answer is B. Implement OTV with the Nexus 7700 Series devices to extend Layer 2 connectivity between the. To enable seamless data accessibility across two data centers and ensure continuous data availability even if one site fails, the team must implement Overlay Transport Virtualization (OTV) using the Cisco Nexus 7700 Series devices to extend Layer 2 connectivity.

Data Center Network Design

Question

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, but 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 if 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?

Options

  • AImplement HSRP with the Nexus 7700 Series devices to provide gateway redundancy to ensure
  • BImplement OTV with the Nexus 7700 Series devices to extend Layer 2 connectivity between the
  • CImplement FabricPath on the Catalyst 8000 routers in both data centers to provide full
  • DImplement NVGRE on the Catalyst 8000 routers to create a DCI communication channel between

How the community answered

(32 responses)
  • A
    6% (2)
  • B
    78% (25)
  • C
    13% (4)
  • D
    3% (1)

Why each option

To enable seamless data accessibility across two data centers and ensure continuous data availability even if one site fails, the team must implement Overlay Transport Virtualization (OTV) using the Cisco Nexus 7700 Series devices to extend Layer 2 connectivity.

AImplement HSRP with the Nexus 7700 Series devices to provide gateway redundancy to ensure

HSRP provides gateway redundancy within a single Layer 2 domain and does not extend Layer 2 connectivity or enable workload mobility between geographically separated data centers.

BImplement OTV with the Nexus 7700 Series devices to extend Layer 2 connectivity between theCorrect

Implementing Overlay Transport Virtualization (OTV) with Cisco Nexus 7700 Series devices is the most suitable solution for extending Layer 2 connectivity between two data centers. OTV encapsulates Layer 2 traffic over an IP-based underlay, enabling seamless migration or failover of virtual machines and applications between geographically separated data centers without requiring IP address changes, directly addressing the requirement for continuous data access and resilience.

CImplement FabricPath on the Catalyst 8000 routers in both data centers to provide full

FabricPath is a Layer 2 multipathing technology designed for within a single data center to build scalable and resilient Layer 2 domains, not for extending Layer 2 connectivity across data centers over a WAN.

DImplement NVGRE on the Catalyst 8000 routers to create a DCI communication channel between

NVGRE is a tunneling protocol for network virtualization, often within a data center or for DCI, but OTV is specifically designed for transparent Layer 2 extension across data centers with optimizations for multi-homing and routing integration.

Concept tested: Data center interconnect (DCI) with OTV

Source: https://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/guide_c07-647648.html

Topics

#Data Center Interconnect#OTV#Layer 2 extension#disaster recovery

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