stretch support added.

scripts/macgen.py

+# python script to generate xen or kvm MAC address.
+#
+import sys
+import random
+#
+def randomMAC(hypervisor='kvm'):
+    l_first_three = []
+    if hypervisor == 'xen':
+        l_first_three = [0x00, 0x16, 0x3e]
+    elif hypervisor == 'kvm':
+        l_first_three = [0x52, 0x54, 0x00]
+    else:  # unknown hypervisor
+        raise Exception("Unknown hypervisor. should be 'kvm' or 'xen'")
+
+            
+    mac = l_first_three + [
+        random.randint(0x00, 0x7f),
+        random.randint(0x00, 0xff),
+        random.randint(0x00, 0xff) ]
+
+    print(':'.join(map(lambda x: "%02x" % x, mac)))
+
+
+if __name__ == "__main__":
+    if len(sys.argv) == 2:
+        randomMAC(sys.argv[1])
+    else:
+        randomMAC()
+