diff --git a/utils/ssh.py b/utils/ssh.py
index 0d82c52..f6d61a2 100644
--- a/utils/ssh.py
+++ b/utils/ssh.py
@@ -178,6 +178,13 @@
                             "seconds.".format(floating_ip, attempts, bsleep))
                 time.sleep(bsleep)
 
+    def get_mtu_from_vm(self, floating_ip, user='ubuntu', password='password',
+                        private_key=None):
+        transport = SSHTransport(floating_ip, user, password, private_key)
+        iface = (transport.exec_command(
+            'ls /sys/class/net | grep -v lo | head -n 1')).decode("utf-8")
+        mtu = transport.exec_command('cat /sys/class/net/{}/mtu'.format(iface))
+        return mtu.decode("utf-8")
 
 class prepare_iperf(object):