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300-610 · Question #86

An engineer is designing a Cisco Nexus 7000 Series disaster recovery site using the data center interconnect solution to provide gateway redundancy and needs to ensure that devices use gateways in the

The correct answer is C. FHRP localized to its own data center. To ensure devices use gateways in their own data centers for redundancy in a DCI solution, FHRP localization should be implemented.

Data Center Network Design

Question

An engineer is designing a Cisco Nexus 7000 Series disaster recovery site using the data center interconnect solution to provide gateway redundancy and needs to ensure that devices use gateways in their own data centers. Which design approach should be used to accomplish this goal?

Options

  • ACFS localized to its own data center
  • BvPC localized to its own data center
  • CFHRP localized to its own data center
  • DSTP localized to its own data center

How the community answered

(34 responses)
  • A
    3% (1)
  • B
    12% (4)
  • C
    76% (26)
  • D
    9% (3)

Why each option

To ensure devices use gateways in their own data centers for redundancy in a DCI solution, FHRP localization should be implemented.

ACFS localized to its own data center

CFS (Cisco Fabric Services) is a protocol for state synchronization between Cisco devices, used for features like vPC, but it does not directly localize or manage Layer 3 gateway redundancy.

BvPC localized to its own data center

vPC (Virtual Port Channel) provides Layer 2 port channel aggregation across two Nexus switches for redundancy within a data center, but it does not directly localize Layer 3 gateways across data center interconnects.

CFHRP localized to its own data centerCorrect

FHRP (First Hop Redundancy Protocol) localization ensures that the active gateway for a given VLAN or subnet resides within the local data center. By configuring FHRPs like HSRP or VRRP to prefer local active gateways, traffic from devices in a data center will always exit through their local gateway, preventing suboptimal routing across the DCI link and ensuring efficient traffic flow.

DSTP localized to its own data center

STP (Spanning Tree Protocol) is a Layer 2 protocol for preventing loops in Ethernet networks and has no direct role in localizing Layer 3 gateways for redundancy.

Concept tested: FHRP localization for DCI gateway redundancy

Source: https://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/white_paper_c11-546051.html

Topics

#Data Center Interconnect#Gateway redundancy#FHRP localization#Nexus 7000

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