The core of the departmental network consists of a single Lannet LET-36 hub, populated with segment and host switching ethernet modules, providing an agregate bandwidth of 280Mbps. All switching modules interface with the cell-based High-Speed Backplane (1.28Gbps) in LET-36 that serves as a Collapsed Backbone.
The switched segment ports connect the central hub to four Ethernet Backplanes in each of the peripheral LET-36 hubs. The switched host ports are used for connections to the AGS+ CISCO router and to hosts providing central network services. All switched ports are currently grouped into two VLANs corresponding to the two router ports.