While troubleshooting a scenario in which the customer has added two new line cards on an HPE Aruba Networking CX 6400 switch, the LEDs on the line card do not show light on the first card. Which…

Question

Options

• ASpot the difference by comparing the switch configurations.
• BDivide and conquer by swapping the line cards in their slot.
• CFollow the path and check the connectivity from the access switch to the CX 6400.
• DReplace the configuration using the previous checkpoint on the switch.

• A
  8% (3)
• B
  79% (30)
• C
  3% (1)
• D
  11% (4)

Explanation

Divide and conquer by swapping the line cards is the correct approach because when one of two identical new components fails, physically swapping them isolates whether the problem follows the card (hardware fault) or stays in the slot (chassis/backplane fault). This is the classic "divide and conquer" methodology - you split the variables to narrow down the root cause efficiently.

• A is wrong because the issue is hardware (no LEDs), not a configuration mismatch - comparing configs won't reveal a dead card or bad slot.
• C is wrong because checking upstream access-switch connectivity is irrelevant; the LEDs haven't even lit, meaning the card hasn't initialized at all.
• D is wrong because rolling back to a checkpoint addresses software/config problems, not a line card that isn't powering on.

Memory tip: Think of it as the "swap test" - whenever two identical hardware units are installed and one misbehaves, swapping them tells you immediately whether the fault travels with the card or stays with the slot. Same card, same problem = bad card. New card, same slot = bad slot.

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