Linux Mint looses his IPv6 GA and ULA

[MaDa]

Please follow the below template, it will help us to help you!

Expected Behaviour:

Fritzbox enables ULA: "Always assign Unique Local Addresses (ULA)"
Therefore the system should have a ULA.

Actual Behaviour:

After installation, the system has a ULA, which is also used when installing pihole.
After one day, however, there are no ULA and Global Adresses on the network link.

ZBOX ~ # ip -6 a    
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000
        inet6 fe80::664e:1354:5c0b:e068/64 scope link
           valid_lft forever preferred_lft forever

Now the ULA in the setupVars.conf is outdated.

my system: Linux Mint 18.3 + Pihole 4.0

Debug Token:

zxq5dg1crg

[jacob.salmela]

Is Linux Mint the only device having a problem keeping their address?

[MaDa]

Hi @jacob.salmela, thank you for your reaction, because i know, it isn't pihole related question.

Yes, the ZBOX is the only once system have such problem. All other devices are fine.
I tries also to defined a static ULA via Network Manager (this one from the day before). But the network card/link doesn't respond of pings.