Fiber optic transceivers can extend Ethernet transmission distances to over 100 kilometers. However, during long-distance transmissions, the transceiver crashes approximately every hour or so, resulting in no internet access. A simple power restart immediately restores normal operation. This issue recurs after a while, indicating an unstable connection.
To address this issue, based on the analysis and understanding of the causes of the failure, three solutions are proposed to minimize the occurrence of switch "freezing".
I. Heat dissipation issues of fiber optic transceivers
Fiber optic transceivers typically age over time, causing them to overheat. If the temperature reaches a certain point, the device will eventually crash. Solutions include replacing the fiber optic transceiver or implementing additional cooling measures. These methods are similar to those used for computers, so they won't be detailed here.
II. Power Supply Issues of Fiber Optic Transceivers
Some low-quality power supplies will become unstable after prolonged use due to aging. You can check this by touching the power supply to see if it gets very hot. If it does, the power supply must be replaced immediately, as it is inexpensive and not worth repairing.
III. Switch Data Congestion Issues
Network outages are often caused by switches. Switches perform CRC error checks and length verification on all received data, discarding erroneous packets and forwarding correct ones. However, some erroneous packets fail to be detected during CRC and length checks. These packets neither get sent nor dropped, accumulating in a dynamic buffer and eventually causing the switch to crash. Restarting the transceiver or switch can clear these packets, but after a while, the buffer fills up again, leading to another switch crash. This situation is usually accompanied by packet loss, so users typically attribute it to a transceiver problem.
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