added a note about supported version

docs/manual/kinds/vr-vqfx.md

@@ -2,6 +2,9 @@
 
 [Juniper vQFX](https://www.juniper.net/us/en/dm/free-vqfx10000-software.html) virtualized router is identified with `vr-vqfx` kind in the [topology file](../topo-def-file.md). It is built using [vrnetlab](../vrnetlab.md) project and essentially is a Qemu VM packaged in a docker container format.
 
+!!!note
+    vQFX images built with [hellt/vrnetlab](https://github.com/hellt/vrnetlab/tree/master/vqfx) have experimental support for vQFX version v18 and newer.
+
 ## Managing vr-vqfx nodes
 
 !!!note