Update OCP IPI README
# OCP-IPI tool
-Submariner gateway nodes need to be able to accept traffic over UDP ports (4500 and 500 by default) when using IPsec. Submariner also uses
-UDP port 4800 to encapsulate traffic from the worker nodes to the gateway nodes. Additionally, the default OpenShift deployment does not
-allow assigning an elastic public IP to existing worker nodes, which may be necessary on one end of the IPsec connection.
+Submariner Gateway nodes need to be able to accept traffic over UDP ports (4500 and 500 by default) when using IPsec. Submariner also uses
+UDP port 4800 to encapsulate traffic from the worker and master nodes to the Gateway nodes. Additionally, the default OpenShift deployment
+does not allow assigning an elastic public IP to existing worker nodes, which may be necessary on one end of the IPsec connection.
`prep_for_subm` is a script designed to update your OpenShift installer provisioned AWS infrastructure for Submariner deployments,
handling the requirements specified above.
