After configuration of ipv4 dns and ipv6 dns, I must restart the service after reboot to resolve ipv6 addresses.
Host system-ipsec not found: 3(NXDOMAIN)
root@z5-manager:~# nslookup system-ipsec
Server: 127.0.0.53
Address: 127.0.0.53#53
** server can't find ssystem-ipsec: NXDOMAIN
root@z5-manager:~# systemctl restart systemd-resolved.service
root@z5-manager:~# nslookup system-ipsec
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: system-ipsec
Address: fd93:169:169::11
question from:https://stackoverflow.com/questions/65517926/system-resolved-service-need-to-restart-after-boot-for-resolve-ipv6-and-ipv4-add