Attach an Elastic IPv6 Prefix

After the Elastic IPv6 prefix has been created, you can then attach it to one or more Compute instances.

To refer to a Elastic IPv6 prefix, use either its unique ID or the reference IPv6 address, as you can see here in the CLI:

$ exo compute elastic-ip show 4ef39790-3409-4b2b-aa44-672db338edd5 -z at-vie-1
┼────────────────┼──────────────────────────────────────┼
│   ELASTIC IP   │                                      │
┼────────────────┼──────────────────────────────────────┼
│ ID             │ 4ef39790-3409-4b2b-aa44-672db338edd5 │
│ IP Address     │ 2a04:c45:c00:3a46:500:2:0:1          │
│ Address Family │ inet6                                │
│ CIDR           │ 2a04:c45:c00:3a46:500:2::/96         │
│ Description    │                                      │
│ Zone           │ at-vie-1                             │
│ Type           │ manual                               │
┼────────────────┼──────────────────────────────────────┼

Attach the Elastic IPv6 prefix like this:

$ exo compute instance elastic-ip attach my-instance 4ef39790-3409-4b2b-aa44-672db338edd5 -z at-vie-1
 ✔ Attaching Elastic IP "4ef39790-3409-4b2b-aa44-672db338edd5" to instance "my-instance"... 3s
┼──────────────────────┼──────────────────────────────────────┼
│   COMPUTE INSTANCE   │                                      │
┼──────────────────────┼──────────────────────────────────────┼
│ ID                   │ 8a7dd501-ccc4-4582-867a-347e14bf43ff │
│ Name                 │ my-instance                          │
│ Creation Date        │ 2022-08-25 14:23:04 +0000 UTC        │
│ Instance Type        │ standard.medium                      │
│ Template             │ Linux Ubuntu 20.04 LTS 64-bit        │
│ Zone                 │ at-vie-1                             │
│ Anti-Affinity Groups │ n/a                                  │
│ Security Groups      │ default                              │
│ Private Networks     │ n/a                                  │
│ Elastic IPs          │ 2a04:c45:c00:3a46:500:2:0:1          │
│ IP Address           │ 185.150.8.7                          │
│ IPv6 Address         │ 2a04:c45:c00:3a46:4fa:70ff:fe00:4a   │
│ SSH Key              │ my-instance-1661437382               │
│ Disk Size            │ 50 GiB                               │
│ State                │ running                              │
│ Labels               │ n/a                                  │
┼──────────────────────┼──────────────────────────────────────┼

Traffic for any address within the Elastic IPv6 prefix is now routed to my-instance.

NOTE
in the case of the manual Elastic IPv6, the user has to configure the address within the attached instances.

For the managed Elastic IPv6, traffic towards the reference IPv6 address is transparently forwarded, with no need for additional configuration. The whole Elastic IPv6 prefix is still routed to the attached instances. However, any other IPv6 addresses need to be configured within the instances.