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Limitations

One limitation of IPv6 is that a /56 block is typically assigned to a data center, with a /64 block assigned inside this /56 block to the Local Area Network (LAN). The difference between a /56 and a /64 block is 8, resulting in 2^8 (2 to the power of 8) blocks, or a total of 256 blocks. This limitation can impact the scalability and flexibility of IPv6 addressing in large networks. Therefore, it is important to carefully consider the allocation of IPv6 blocks to ensure efficient utilization of available resources.
You will get a new /56 prefix every time you create a new data center. If your services depend on static IPv6 addresses, and you want to rebuild your data center, you must not delete the data center itself, but only its components, such as, LANs, NICs, etc. For more information about how to create new Data Center LANs in DCD, see DCD How-Tos.
Currently, only Ubuntu and Windows images are supported. If you want to use images other than these, you need to tweak the OS initialization process of your image. For example, the Dynamic Host Configuration Protocol version 6 (DHCPv6) client may need to be run manually after restarting the system for Debian. We are currently working on supporting IPv6 on all IONOS images selectable in the DCD. Generally, if the interfaces have not received an IPv6 address from the IONOS DHCP server, try to run the DHCPv6 client manually. For more information, see FAQs.
AlmaLinux operates seamlessly when the hostname aligns with the requirements of the Network Manager DHCPv6 client. To ensure smooth functionality, it is crucial to have a valid hostname. For more information, see the Hostname.
In previous versions of Rocky Linux, it is important to note that the IPv6 protocol may not be readily available after the initial boot. For the latest version Rocky Linux 9.0, you can use IPv6 support right from the first boot.
Currently, IPv6 is not available for Managed Services such as Application Load Balancer (ALB), Network Load Balancer (NLB), Network Address Translation (NAT) Gateway, IP Failover and Managed Kubernetes (MK8s).

Limitations

One limitation of IPv6 is that a /56 block is typically assigned to a data center, with a /64 block assigned inside this /56 block to the Local Area Network (LAN). The difference between a /56 and a /64 block is 8, resulting in 2^8 (2 to the power of 8) blocks, or a total of 256 blocks. This limitation can impact the scalability and flexibility of IPv6 addressing in large networks. Therefore, it is important to carefully consider the allocation of IPv6 blocks to ensure efficient utilization of available resources.
You will get a new /56 prefix every time you create a new data center. If your services depend on static IPv6 addresses, and you want to rebuild your data center, you must not delete the data center itself, but only its components, such as, LANs, NICs, etc. For more information about how to create new Data Center LANs in DCD, see DCD How-Tos.
Currently, only Ubuntu and Windows images are supported. If you want to use images other than these, you need to tweak the OS initialization process of your image. For example, the Dynamic Host Configuration Protocol version 6 (DHCPv6) client may need to be run manually after restarting the system for Debian. We are currently working on supporting IPv6 on all IONOS images selectable in the DCD. Generally, if the interfaces have not received an IPv6 address from the IONOS DHCP server, try to run the DHCPv6 client manually. For more information, see FAQs.
AlmaLinux operates seamlessly when the hostname aligns with the requirements of the Network Manager DHCPv6 client. To ensure smooth functionality, it is crucial to have a valid hostname. For more information, see the Hostname.
In previous versions of Rocky Linux, it is important to note that the IPv6 protocol may not be readily available after the initial boot. For the latest version Rocky Linux 9.0, you can use IPv6 support right from the first boot.
Currently, IPv6 is not available for Managed Services such as Application Load Balancer (ALB), Network Load Balancer (NLB), Network Address Translation (NAT) Gateway, IP Failover and Managed Kubernetes (MK8s).