如何从谷歌云实例 ping ipv6

Question

I have a google cloud instance. I do not need ipv6 but I need to be able to connect to public ipv6. I have added a firewall rule which allows ::/0 for outgoing traffic. Now When I try to ping ipv6.google.com, it gives response- network is unreachable. What do I need to do to be able to ping any ipv6 like ipv6.google.com. Thank you.

Answer 1

Google cloud now supports external ipv6 on VM instances. Each instance can get a /96 external ip range and it can be used to access internet (without NAT) or be used for VM to VM traffic.

At this moment (July 2021) it's only supported limited regions:

• asia-east1
• asia-south1
• europe-west2
• us-west2

See more detailed in

https://cloud.google.com/compute/docs/ip-addresses/configure-ipv6-address https://cloud.google.com/vpc/docs/vpc#ipv6-addresses

Note that connecting to Google APIs and services using external IPv6 addresses is currently not supported and will result in a destination unreachable ICMP response. Most applications will fallback to IPv4 transparently. So don't be surprise if you cannot ping ipv6.google.com. You should able to ping other ipv6 websites.