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-rw-r--r--docs/vpn/site2site_ipsec.rst2
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/vpn/site2site_ipsec.rst b/docs/vpn/site2site_ipsec.rst
index 3f00d91a..08ccc648 100644
--- a/docs/vpn/site2site_ipsec.rst
+++ b/docs/vpn/site2site_ipsec.rst
@@ -225,7 +225,7 @@ Imagine the following topology
IPSec IKEv2 site2site VPN (source ./draw.io/vpn_s2s_ikev2.drawio)
-.. note:: Don't get confused about the used /31 tunnel subnet. :rfc:`3031`
+.. note:: Don't get confused about the used /31 tunnel subnet. :rfc:`3021`
gives you additional information for using /31 subnets on point-to-point
links.