Beowulf Network Topology

Our Beowulf is implemented as a private network. We use the IP network address (which is part of the domain reserved by the powers-that-be for the private networks of us mortals). The nodes (apart from the master) have no gateway to the outside world nor any domain name service. They can not communicate to any machine not on the private network. Furthermore, no DNS service knows of their existence, nor is there any gateway to them. They are isolated from anything not on their private network.

The master node acts as the access point for the outside world to reach the Beowulf system. Because it is on the network, it can communicate with the other nodes, and because it is on the physics subnet, we can communicate with it. We have chosen to try to limit access to the Master node even from the network as much as possible. The topology is shown below