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SG0-001 · Question #300

A customer has deployed redundant switched fabrics in a HA environment which also includes non-HA, single-attached test servers. A new project requires additional connectivity for new HA servers to…

The correct answer is A. Add a new switch to the problem fabric to increase available ports on the switches. To cost-effectively add port capacity for new HA servers in one of two redundant fabrics, the best option is to add a new switch specifically to the fabric experiencing port shortages.

Storage Management

Question

A customer has deployed redundant switched fabrics in a HA environment which also includes non-HA, single-attached test servers. A new project requires additional connectivity for new HA servers to be placed into production, but there are not enough free ports available in one of the existing fabrics to complete the HA deployment. Which option would allow for the addition of the new hosts while maintaining the redundant infrastructure at least cost?

Options

  • AAdd a new switch to the problem fabric to increase available ports on the switches.
  • BAdd a new switch to both fabrics to increase available ports on the switches.
  • CAdd ISL's between the existing fabrics to leverage all available ports on the switches.
  • DCascade the existing switches into a new director class switch and add the hosts to the

How the community answered

(30 responses)
  • A
    80% (24)
  • B
    3% (1)
  • C
    10% (3)
  • D
    7% (2)

Why each option

To cost-effectively add port capacity for new HA servers in one of two redundant fabrics, the best option is to add a new switch specifically to the fabric experiencing port shortages.

AAdd a new switch to the problem fabric to increase available ports on the switches.Correct

Adding a new switch to only the problem fabric provides the necessary port expansion where it is needed, maintains the existing redundant fabric design, and is the most cost-effective solution as it avoids unnecessary expenditures on the other fabric.

BAdd a new switch to both fabrics to increase available ports on the switches.

Adding a new switch to both fabrics is not the least-cost option when only one fabric has a port shortage, leading to unnecessary expenditure.

CAdd ISL's between the existing fabrics to leverage all available ports on the switches.

Adding ISLs (Inter-Switch Links) between existing redundant fabrics would compromise the isolation and redundancy principles of a dual-fabric design, potentially introducing single points of failure or fabric merge issues.

DCascade the existing switches into a new director class switch and add the hosts to the

Cascading existing switches into a new director-class switch is a significant architectural change that involves high cost for the new hardware and extensive reconfiguration, making it an expensive option rather than the least-cost solution.

Concept tested: Fibre Channel fabric expansion for port capacity

Source: https://www.cisco.com/c/en/us/products/collateral/storage-networking/mds-9000-series-multilayer-switches/prod_qas0900aecd80430b13.html

Topics

#Fabric expansion#Port utilization#HA design#Cost optimization

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