diff --git a/roles/config-virt/defaults/main.yml b/roles/config-virt/defaults/main.yml
new file mode 100644
index 0000000..8a1faf1
--- /dev/null
+++ b/roles/config-virt/defaults/main.yml
@@ -0,0 +1,4 @@
+---
+# roles/config-virt/defaults/main.yml
+
+mgmtbr_name: virbr0