From 56670f9fe9cf52db52b8ad7b950f1e3c61ee47ac Mon Sep 17 00:00:00 2001 From: dkeightley <20566450+dkeightley@users.noreply.github.com> Date: Tue, 16 Sep 2025 11:33:42 +1200 Subject: [PATCH] Add existing cluster note Inline with the k3s documentation it is helpful to note that changing an existing cluster to dual-stack is not supported --- docs/networking/basic_network_options.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/docs/networking/basic_network_options.md b/docs/networking/basic_network_options.md index 058d206a..f50621dc 100644 --- a/docs/networking/basic_network_options.md +++ b/docs/networking/basic_network_options.md @@ -229,6 +229,8 @@ cluster-cidr: "10.42.0.0/16,2001:cafe:42::/56" service-cidr: "10.43.0.0/16,2001:cafe:43::/112" ``` +Dual-stack networking must be configured when the cluster is first created. It cannot be enabled on an existing cluster once it has been started as IPv4-only. + Each CNI Plugin may require a different configuration for dual-stack: