Setting multiple acls on a node with zkCli

[Talluri, Chandra]

Hi
While using Command line script ZkCli.sh on Zookeeper to set ACL's for a range 
of Ip's
for setAcl / ip:10.0.0.0/16:cdrw I always get "Acl is not valid : /" 
(zookeeper.version=3.4.6 release version)
What is the right Syntax?
-Thanks in Advance
Chandra Talluri