Network Organization

The thirty-eight workstations in Room 2128 are grouped into five clusters of seven or eight workstations each. Each cluster has a multiport Ethernet hub, to which the network interface of each workstation is connected. Each of the five hubs also connects to a 24-port Ethernet switch Other ports of the switch connect via additional multiport hubs to the various server systems, which provide user files and other network services to the laboratory.

Currently, there are about nine server machines:

Public is an Dual Xeon 3.2GHz system running FreeBSD and is available for remote login by users. It is intended as a general-purpose compute server for use by remote users or when Room 2128 is closed.
Www is a Pentium II/450MHz system running FreeBSD, on which the Web server for the lab runs. It is not available for login, but it will execute CGI scripts for users and it has access to user filesystems. To view the Web server logs, log in to public and go to directory /wwwlogs.
The machine bfs1 is an AMD K6-2 running FreeBSD. This machine is the main binary file server for the client workstations. It is not available for users to log in.
The machine bfs2 is an Intel AMD K6-2 running FreeBSD. Currently, this machine runs the mail server, as well as some binary file service to the client workstations. It is not available for users to log in.
The raid1 and raid2 servers are Pentium or Pentium II-based machines that perform user file service. They are not available for users to log in. These machines host the user filesystem volumes accessible on client workstations as /home/a, /home/b, /home/c, /home/d, /home/e, /home/f, /home/g, /home/h. Users' home directories are located on these volumes.
The system console machine is used for system maintenance. It also provides network name and time services.
The gateway machine serves as the link to the campus network, and performs IP filtering tasks.

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