Several users are reporting that they are unable to connect to the network. After further investigation, the network administrator notices that a newly configured Layer 2 device lost its…

The correct answer is D. Power failure. When a switch or other Layer 2 device loses power before its running configuration is saved to non-volatile storage (startup-config/NVRAM), it reverts to factory defaults upon reboot. A newly configured device is especially vulnerable because administrators may not have yet…

Network troubleshooting

Question

Several users are reporting that they are unable to connect to the network. After further investigation, the network administrator notices that a newly configured Layer 2 device lost its configuration. Which of the following MOST likely caused the issue?

Options

AWrong default gateway
BWrong DNS
CSwitching loop
DPower failure

How the community answered

(45 responses)

A
2% (1)
B
4% (2)
C
2% (1)
D
91% (41)

Explanation

When a switch or other Layer 2 device loses power before its running configuration is saved to non-volatile storage (startup-config/NVRAM), it reverts to factory defaults upon reboot. A newly configured device is especially vulnerable because administrators may not have yet saved the configuration. A power failure is the most direct cause of a device losing its configuration. A switching loop would cause network disruption but would not erase the device's configuration. Wrong default gateway or DNS settings are Layer 3 issues and would not cause a Layer 2 device to lose its configuration.

Topics

#switch configuration#power failure#Layer 2 devices#network hardware

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