好像不太对
sudo ip -6 neigh flush all
nslookup可以发现，dns时而返回ipv6地址时而不返回，什么鬼
root@VM-24-4-ubuntu:/home/ubuntu# nslookup google.com Server: 1.1.1.1 Address: 1.1.1.1#53 Non-authoritative answer: Name: google.com Address: 142.251.46.206 Name: google.com Address: 8.7.198.46 root@VM-24-4-ubuntu:/home/ubuntu# nslookup google.com Server: 1.1.1.1 Address: 1.1.1.1#53 Non-authoritative answer: Name: google.com Address: 172.217.12.110 Name: google.com Address: 8.7.198.46 root@VM-24-4-ubuntu:/home/ubuntu# nslookup google.com Server: 1.1.1.1 Address: 1.1.1.1#53 Non-authoritative answer: Name: google.com Address: 172.217.12.110 Name: google.com Address: 2607:f8b0:4005:80f::200e root@VM-24-4-ubuntu:/home/ubuntu# nslookup google.com Server: 1.1.1.1 Address: 1.1.1.1#53 Non-authoritative answer: Name: google.com Address: 142.251.32.46 Name: google.com Address: 2607:f8b0:400a:80b::200e
