modification to use cluster version
Change-Id: Iaf169507577deba20d548348532a2e0b91a03249
refs: #3652
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+Mini-NDN cluster edition
+========================
+
+Mini-NDN cluster edition uses the experimental Mininet cluster edition.
+**Make sure that you can run the Mininet cluster edition by following
+[these instructions](https://github.com/mininet/mininet/wiki/Cluster-Edition-Prototype)**.
+Mini-NDN will use the "mininet" username created in Mininet cluster edition setup.
+
+## Mini-NDN cluster options
+
+To run Mini-NDN cluster on `localhost` and another server `server1` with
+the guided node placement strategy (default), the following command can be used:
+
+ sudo minindn --cluster=localhost,server1 --place-list=1,3
+
+Note that `place-list` specifies the number of nodes to be placed on the corresponding servers
+of the cluster.
+In the example, one node will be placed on `localhost` and three nodes on `server1`.
+Unless specified, the default 4 node topology is used.
+Another placement can be `roundRobin` placement algorithm from Mininet.
+This does not require a place-list.
+
+ sudo minindn --cluster=localhost,server1 --placement roundRobin
+
+By default the tunnel type used is SSH, but GRE tunnel can be specified by `--tunnel-type=gre`