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Difficulty: MediumHigh Availability and Redundancy Concepts

Match each enterprise high-availability mechanism on the left with its corresponding operational function on the right.

  • Dual power supply with independent PDU feedsMitigates power infrastructure failures by drawing electricity from separate power distribution units.
  • Link Aggregation Control Protocol (LACP)Combines physical Ethernet links into a logical interface to provide link redundancy and increased throughput.
  • Multipath I/O (MPIO)Establishes multiple redundant data pathways between host storage adapters and SAN storage controllers.
  • Virtual Router Redundancy Protocol (VRRP)Assigns a shared virtual IP address across multiple routers to maintain default gateway availability without proprietary lock-in.

Answer

Dual power supplies connect to separate PDUs to prevent electrical outage points. LACP aggregates physical switch links into a logical interface. MPIO creates redundant storage connection paths. VRRP provides default gateway failover via an open-standard virtual IP.
Each mechanism addresses high availability at a distinct layer of enterprise infrastructure: dual power supplies protect hardware power feeds; LACP aggregates Layer 2 ethernet links; MPIO ensures block storage access resilience; VRRP provides open-standard Layer 3 default gateway redundancy.

Step-by-Step Solution

1
Analyze power redundancy requirements
Dual power supplies fed by independent PDUs safeguard hardware against circuit failure.
Redundant power hardware relies on independent feed paths to prevent a single point of failure.
2
Identify network link aggregation mechanisms
LACP bundles multiple network cables into a single trunk for failover and throughput.
LACP dynamically negotiates link aggregation across interfaces.
3
Evaluate storage interconnect redundancy
MPIO routes host storage I/O traffic over multiple redundant host-to-SAN paths.
MPIO provides path failover and load balancing for storage block devices.
4
Select the appropriate gateway redundancy protocol
VRRP establishes an open-standard virtual IP shared among multiple routers.
VRRP allows automatic failover of default gateways without vendor lock-in.

Key Concept

High Availability and Redundancy Architecture across Power, Network Links, Storage, and First-Hop Routers
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Topics

High Availability and Redundancy Concepts

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