diff --git a/source/hardware/sfp_compatibility.rst b/source/hardware/sfp_compatibility.rst
index b870552c..b9ba6651 100644
--- a/source/hardware/sfp_compatibility.rst
+++ b/source/hardware/sfp_compatibility.rst
@@ -69,6 +69,12 @@ For short ranges (up to 10M), often a popular choice due to low cost and low lat
 
     10 Mbit/s is currently not supported by Axgbe.
 
+
+.. Note::
+
+    When using SFP+Modules, do not mix 2.5/5Gbps and 10Gbps link-speed as the hardware does not support mixing these due to different frequencies.
+
+
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 1G Single-mode optical fiber
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