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Difficulty: EasyHigh Availability and Redundancy Concepts

A network technician is deploying high availability for enterprise servers connected to redundant access switches. Which TWO of the following technologies or mechanisms directly provide link aggregation and adapter redundancy at Layer 2?

  1. Link Aggregation Control Protocol (LACP) configured on connected switch ports to bundle physical links into a single logical channel.Answer
  2. NIC Teaming (network interface card bonding) enabled on the servers to combine multiple physical adapters into a redundant group.Answer
  3. C
    Assigning host default gateways directly to the physical IP address of an individual core router interface rather than a shared Virtual IP (VIP).
  4. D
    Configuring the primary switch with the highest numerical Spanning Tree Protocol (STP) priority value (such as 61440) to force root bridge election.
  5. E
    Placing redundant servers into different VLANs on the same physical switch without a Layer 3 routing device.

Answer

The correct options are Link Aggregation Control Protocol (LACP) on switch ports and NIC Teaming on server network adapters.
Link Aggregation Control Protocol (LACP) aggregates physical switch links into a single logical EtherChannel, maintaining network connectivity if an individual cable or port fails. NIC Teaming joins multiple server network adapters together in active-active or active-passive arrangements to shield the server from single network card failures.

Step-by-Step Solution

1
Identify the high availability requirements specified in the scenario
The requirement specifies Layer 2 link aggregation and network adapter redundancy between host servers and access switches.
High availability at the physical and data link layers requires redundancy for both the host interfaces and the switch port channels.
2
Evaluate technologies that bundle physical links between switches and servers
LACP combines multiple physical switch ports into a single logical channel, providing link failover and aggregate bandwidth. NIC Teaming binds multiple server network interface cards into a fault-tolerant group.
Together, LACP and NIC Teaming eliminate single cable or network adapter points of failure at Layer 2.

Key Concept

Layer 2 High Availability and Link Aggregation (LACP & NIC Teaming)
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Topics

High Availability and Redundancy Concepts

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