Merge pull request #482 from dumlutimuralp/patch-5

Reflecting new IPv6 CIDR block and subnet size updates
aws · Mar 13, 2024 · 59283a9 · 59283a9
2 parents b9f25d9 + 57d78a8
commit 59283a9
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/content/networking/subnets/index.md b/content/networking/subnets/index.md
@@ -49,7 +49,7 @@ Note that the cluster's API server endpoint is resolved by public DNS servers to
 
 Amazon VPC supports IPv4 and IPv6 addressing. Amazon EKS supports IPv4 by default. A VPC must have an IPv4 CIDR block associated with it. You can optionally associate multiple IPv4 [Classless Inter-Domain Routing](http://en.wikipedia.org/wiki/CIDR_notation) (CIDR) blocks and multiple IPv6 CIDR blocks to your VPC. When you create a VPC, you must specify an IPv4 CIDR block for the VPC from the private IPv4 address ranges as specified in [RFC 1918](http://www.faqs.org/rfcs/rfc1918.html). The allowed block size is between a `/16` prefix (65,536 IP addresses) and `/28` prefix (16 IP addresses). 
 
-When creating a new VPC, you can attach a single IPv6 CIDR block, and up to five when changing an existing VPC. The prefix length of the CIDR block is fixed at /64 for IPv6 VPCs, which has [more than one trillion IP addresses](https://www.ripe.net/about-us/press-centre/understanding-ip-addressing#:~:text=IPv6%20Relative%20Network%20Sizes%20%20%20%2F128%20,Minimum%20IPv6%20allocation%20%201%20more%20rows%20). You can request an IPv6 CIDR block from the pool of IPv6 addresses maintained by Amazon.
+When creating a new VPC, you can attach a single IPv6 CIDR block, and up to five when changing an existing VPC. The prefix length of the IPv6 CIDR block size can be between /44 and /60 and for the IPv6 subnets it can be betwen /44/ and /64. You can request an IPv6 CIDR block from the pool of IPv6 addresses maintained by Amazon. Please refer to [VPC CIDR blocks](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-cidr-blocks.html) section of the VPC User Guide for more information.
 
 Amazon EKS clusters support both IPv4 and IPv6. By default, EKS clusters use IPv4 IP. Specifying IPv6 at cluster creation time will enable the use IPv6 clusters. IPv6 clusters require dual-stack VPCs and subnets.