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300-610 · Question #262

Refer to the exhibit. A company plans to implement high availability between the iSCSI host and the Fibre Channel target. Which configuration must the company implement to recover from the failure of

The correct answer is D. Configure a redundant Fibre Channel link to connect the MDS and Fibre Channel target.. To ensure high availability and recovery from an MDS IP storage port failure when connecting an iSCSI host to a Fibre Channel target, a redundant Fibre Channel link between the MDS and the Fibre Channel target is crucial.

Storage Network Design

Question

Refer to the exhibit. A company plans to implement high availability between the iSCSI host and the Fibre Channel target. Which configuration must the company implement to recover from the failure of an MDS IP storage port?

Options

  • AConfigure FCoE between the host NIC and MDS ports.
  • BConfigure the MDS Fibre Channel port mode to be fabric loop.
  • CConfigure VRRP on the MDS Ethernet ports 1/1 and 2/1.
  • DConfigure a redundant Fibre Channel link to connect the MDS and Fibre Channel target.

How the community answered

(30 responses)
  • A
    20% (6)
  • B
    3% (1)
  • C
    7% (2)
  • D
    70% (21)

Why each option

To ensure high availability and recovery from an MDS IP storage port failure when connecting an iSCSI host to a Fibre Channel target, a redundant Fibre Channel link between the MDS and the Fibre Channel target is crucial.

AConfigure FCoE between the host NIC and MDS ports.

Configuring FCoE between the host NIC and MDS ports would converge traffic but does not directly provide high availability for the Fibre Channel connectivity to the target in case of an MDS IP storage port failure.

BConfigure the MDS Fibre Channel port mode to be fabric loop.

Configuring the MDS Fibre Channel port mode to be fabric loop is used for connecting to Fibre Channel Arbitrated Loop (FC-AL) devices, an older technology, and does not provide general high availability for modern FC target connections.

CConfigure VRRP on the MDS Ethernet ports 1/1 and 2/1.

Configuring VRRP (Virtual Router Redundancy Protocol) on MDS Ethernet ports 1/1 and 2/1 provides Layer 3 gateway redundancy for IP routing functions, but it does not address the high availability of the Fibre Channel path to the storage target from the MDS.

DConfigure a redundant Fibre Channel link to connect the MDS and Fibre Channel target.Correct

When an MDS switch acts as an iSCSI-to-Fibre Channel gateway, a failure on an MDS IP storage port would affect the iSCSI host's access to the Fibre Channel fabric. Implementing a redundant Fibre Channel link between the MDS and the Fibre Channel target ensures that if one FC path or port on the MDS fails, an alternate path is available, maintaining connectivity for the iSCSI host to the storage target.

Concept tested: Storage network high availability

Source: https://www.cisco.com/c/en/us/td/docs/storage/san_and_lan/mds9000/sw/rel_3_x/config/cfg_ip_storage/ip_storage.html

Topics

#SAN high availability#Fibre Channel#MDS switch#iSCSI

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