diff --git a/sros/docker/launch.py b/sros/docker/launch.py
index c8e1db39..5448830d 100755
--- a/sros/docker/launch.py
+++ b/sros/docker/launch.py
@@ -871,9 +871,9 @@ def gen_mgmt(self):
         res.append("-netdev")
         res.append("bridge,br=br-mgmt,id=br-mgmt" % {"i": 0})
 
-        if "chassis=ixr-r6" in self.variant["timos_line"]:
+        if "chassis=ixr-r6" in self.variant["timos_line"] or "chassis=ixr-ec" in self.variant["timos_line"]:
             logger.debug(
-                "detected ixr-r6 chassis, creating a dummy network device for SFM connection"
+                "detected ixr-r6/ec chassis, creating a dummy network device for SFM connection"
             )
             res.append(f"-device virtio-net-pci,netdev=dummy,mac={vrnetlab.gen_mac(0)}")
             res.append("-netdev tap,ifname=sfm-dummy,id=dummy,script=no,downscript=no")