[FS#604] no recognition for plug out ethernet cable on WAN Port

[LEDE Bugs]

The following task has a new comment added:

FS#604 - no recognition for plug out ethernet cable on WAN Port 
User who did this - Jo-Philipp Wich (jow-)

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You can't if the switch hardware does not offer such notifications.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=604#comment2095