[FS#668] ipv6 not working after some time

[LEDE Bugs]

The following task has a new comment added:

FS#668 - ipv6 not working after some time
User who did this - Hans Dedecker (dedeckeh)

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A wan6 interface is created on top of eth1 which is not correct when using ppp; in the current config two IPv6 interfaces will be created  (wan6 and wan_6) which can cause the IPv6 connectivity issues

In case of ppp an IPv6 interface can be created in two ways based on the ipv6 uci ppp parameter.

In case ipv6 uci parameter is unset or set to auto a dynamic "wan_6" interface will be created; if ipv6 is set to 1 the wan6 interface needs to be explicitly configured but the ifname needs to be set to @wan.

Thus in case you want to keep the wan6 interface config add the following config
uci set network.wan.ipv6=1
uci set network.wan6.ifname=@wan

or either remove the wan6 interface and let PPP create a dynamic IPv6 wan_6 interface  

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=668#comment2293