[FS#1002] Dns ipv6 problem when interface restart

[LEDE Bugs]

The following task has a new comment added:

FS#1002 - Dns ipv6 problem when interface restart
User who did this - Mathias Kresin (mkresin)

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> Dual-stack (solved by adding a second pppoe... https://forum.lede-project.org/t/problem-with-ipv6-and-mobile-device/241/52)

Well, I'm still not convinced that a 2nd pppoe connection is required. According to the ifstatus wan/ifstatus wan6 output you pasted earlier using "my" config, it is enough to change the ppp username/password. Long story short, if "ifstatus wan" and "ifstatus wan6" shows IP addresses using my config you have dual stack.

>  My device connect to lan... with dual stack guest interface doesn't have any problem as it have only ipv4 address. 

Wrong! Your paste shows once more that the IPv6 prefix is assigned to the guest network. Means you still don't have the ip6weight option set (or dropped the ip6assign from the guest network). Hence the question for the "uci show network" output, to verify that you have every thing done as requested and their is no typo or similar.

> after about 160 sec "ipv6-prefix" reset to 360 (is it good? )

Yes it is good. Everything works as it should be.

> found the problem... if i click (from the gui) connect to wan6 interface and then wan interface... wan6 gets ip but doesn't get dns

And no IPv6 prefix. Your clients shouldn't get an IPv6 address in that case at all.

Please provide the "uci show network" output!
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1002#comment3450