В интерфесах такое
iface eno1 inet6 static
address [2a01МОЙIPV614a5::2]
netmask 64
gateway fe80::1
ifconfig -a
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet [МОЙIPV4] netmask 255.255.255.224 broadcast [МОЙБРОДКАСТ]
inet6 fe80::b62e.....48:1a74 prefixlen 64 scopeid 0x20<link>
ether [МОЙMAC] txqueuelen 1000 (Ethernet)
RX packets 601200653 bytes 544993225238 (507.5 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 460052904 bytes 364392729212 (339.3 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0x51200000-51220000
Всё что трогал по ipv6 это
sysctl