Campus network connectivity is provided and maintained by OIT. Currently, there are dual paths, for redundancy and load balancing, between campus the the Internet. Each link provides 1 Gbps connectivity. A separate 1 Gbps connection provides access to Internet2. While restricted in accessability to certain internal networks, there is also a 1 Gbps connection to the ESnet. More information concerning these connections can be found on the OIT web site, http://www.net.princeton.edu/internet.html. For current information on the internal, campus network, please see http://www.net.princeton.edu/network-architecture.html.
Head nodes are all connected to the campus network with a 1Gbps connection. The internal network on the clusters is very cluster dependent. All clusters, except artemis, use a 1Gbps private network for NFS and local communication. Artemis uses an Infiniband network for this activity. Depending on the cluster, a high performance, low latency Infiniband network also is attached for use with MPI parallel communication.
All private networks connect to the central GPFS storage (/tigress-hsm) over a 10Gbps network connection. In almost all cases this is tied into the private 1Gbps network. This is also a private network with fibre connections between 87 Prospect and the Lewis Library where the machines are currently housed.