diff --git a/_toc.yml b/_toc.yml
index 5eb1d70f..6a274736 100644
--- a/_toc.yml
+++ b/_toc.yml
@@ -38,6 +38,7 @@ parts:
           - file: infrastructure-guide/metrics00
           - file: infrastructure-guide/lxsup00
       - file: infrastructure-guide/infrastructure_administration
+      - file: infrastructure-guide/troubleshooting
 
   - caption: RHEL8
     chapters:
diff --git a/infrastructure-guide/troubleshooting.md b/infrastructure-guide/troubleshooting.md
new file mode 100644
index 00000000..c9dfa05e
--- /dev/null
+++ b/infrastructure-guide/troubleshooting.md
@@ -0,0 +1,7 @@
+# Troubleshooting
+
+## Network Issues
+To be able to debug early network issues in the boot process the 2 test VMs lxdev04 and lxdev05 have network port mirroring enabled.
+
+I.e. lxdev04 has a second interface that mirrors the primary interface of lxdev05 and lxdev05 has a second interface that mirrors the primary interface of lxdev04.
+