The network structure/topology in a cluster may be the most important design decision. There are countless options, but the most relevant options are covered here.
This is the simplest network layout you can plan for a cluster. The head node has only one network interface and all the compute nodes are on the same network. Please note that the head node will still be serving DHCP on the network, so you need to disable DHCP on all routers/switches.
Enclosed Compute Network
In this setup, the head node has two network interfaces and is attached to two separate switched networks:
Split Compute/Management Networks
In this design the compute nodes communicate to each other on a separate physical network (compute network) from the one they use to speak to the head node (management network). This kind of layout is not directly supported by the wizard and requires additional manual configuration.
Infiniband is currently supported at kernel level, but the OpenFabrics Enterprise Distribution (OFED) userspace utilities are not distributed and must be manually installed.
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