IPv6
1. IPv6
In this module, we will discuss IPv6. VPC networks now support IPv6 addresses. Support for IPv6 addresses can vary per subnet. To support IPv6, Google Cloud has introduced the concept of a subnet stack. The subnet stack defines the type of address that can be assigned to objects in the subnet. Single and dual-stack subnets support IPv4 and IPv6. There's no subnet that only supports IPv6. IPv6 addresses can be assigned to objects in a subnet that supports IPv6. In other words, you can only assign IPv6 addresses to objects in a dual-stack subnet. You can configure the IPv6 access type to be internal or external. Internal IPv6 addresses are used for VM to VM communication within VPC networks. These use unique local addresses, ULAs, which can only be routed within VPC networks and cannot be routed to the Internet. External IPv6 addresses can be used for communication between VMs within VPC networks. These use global unicast addresses or GUAs, and are also routable on the Internet. Connected VMs inherit the IPv6 access type from the subnet. When configuring your VPC networks and subnets to use a IPv6 address, consider the caveat that dual-stack subnets are not supported on auto mode VPC networks or legacy networks. If you have an auto mode VPC network that you want to add dual-stack subnets to, you can convert the auto mode VPC network to custom mode.2. Let's practice!
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