[FS#3390] IPv6 network stops working after a while

[OpenWrt Bugs]

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FS#3390 - IPv6 network stops working after a while
User who did this - Luiz Angelo Daros de Luca (luizluca)

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If this timeout is exactly periodic, it might be that your interface address timeout:


# ip -6 a | grep -B1 'lft [0-9]'
    inet6 2804:14d:xxxx:xxxx::1/64 scope global dynamic noprefixroute 
       valid_lft 75888sec preferred_lft 61488sec
--
    inet6 2804:14d:xxxx:yyyy::833/128 scope global dynamic noprefixroute 
       valid_lft 75889sec preferred_lft 61489sec



You might want to manually set prefered_lft to a small value to test the symptoms:

ip a change 2804:14d:xxxx:yyyy::833/128 preferred_lft 99 dev eth0.2

Normally it is an ISP issue.
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3390#comment8936

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