What is the network interface requirement for adding a secondary HA node to the primary HA node?

Question

Options

• AA crossover connection between the primary and secondary host is needed.
• BA crossover connection needs to be configured on all bonded interfaces.
• CAll the network interfaces on the primary and secondary host should be bonded.
• DThe primary host cannot contain more physical interfaces than the secondary host.

• A
  13% (3)
• B
  4% (1)
• C
  79% (19)
• D
  4% (1)

Explanation

Option C is correct because bonding all network interfaces on both the primary and secondary HA nodes ensures that every traffic path is mirrored and synchronized between them - if the primary fails, the secondary can take over all network functions seamlessly without any interface gaps or mismatches.

Why the distractors are wrong:

• A is wrong because a crossover cable is not a requirement for HA pairing; modern HA setups use dedicated HA links over standard connections, not physical crossover cables.
• B is wrong because it conflates two unrelated concepts - crossover cabling and interface bonding - and there is no requirement to configure crossover connections on bonded interfaces specifically.
• D is wrong because the requirement is about interface bonding, not about enforcing a maximum interface count on the primary; the primary is not restricted from having more physical interfaces.

Memory tip: Think "bond = mirror" - for HA to work, both nodes need a fully bonded (matched and linked) interface set so there's nothing the secondary can't replicate when it takes over. If even one interface is unbonded, failover has a blind spot.

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