From 85a5a79ef5c4c63613e37b1d7e0b5d14f3c087be Mon Sep 17 00:00:00 2001
From: Cyclinder <qifeng.guo@daocloud.io>
Date: Tue, 17 Jan 2023 04:32:09 +0800
Subject: [PATCH] doc: don't set calico_vxlan_mode_ipv6=vxlanAlways when kernel
 < 3.12 (#9645)

Signed-off-by: cyclinder qifeng.guo@daocloud.io

Signed-off-by: cyclinder qifeng.guo@daocloud.io
---
 docs/calico.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/calico.md b/docs/calico.md
index f362254ce..433d4ce1b 100644
--- a/docs/calico.md
+++ b/docs/calico.md
@@ -235,6 +235,8 @@ If you are running your cluster with the default calico settings and are upgradi
 * perform a manual migration to vxlan before upgrading kubespray (see migrating from IP in IP to VXLAN below)
 * pin the pre-2.19 settings in your ansible inventory (see IP in IP mode settings below)
 
+**Note:**: Vxlan in ipv6 only supported when kernel >= 3.12. So if your kernel version < 3.12, Please don't set `calico_vxlan_mode_ipv6: vxlanAlways`. More details see [#Issue 6877](https://github.com/projectcalico/calico/issues/6877).
+
 ### IP in IP mode
 
 To configure Ip in Ip mode you need to use the bird network backend.
-- 
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