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 at least 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. Thee machines tigressdata and della4 are connected with 10Gbps links. The internal network on the clusters is very cluster dependent. All clusters use a 1Gbps private network for local communication while the NFS servers are now connected using Infiniband. 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) over the Infiniband network connection. This is also a private network with fibre connections between the data center and the Lewis Library where some machines are currently housed. This private network also is used for /tigress backups.