LAN - Switched Network
Based on mass market switched Ethernet
Standard desktop has 10Mbps shared (via hub)
Hubs connect to 10Mbps Building switch port
Building switch connects to core switch at 100Mbps
Core switches are interconnected at 100Mbps
Core switches connected to core routers at 100Mbps
Main servers connect via dedicated 100Mbps
Use VLANs to provide instances of given subnets across many buildings
Notes:
Switch port occupancy 80-85% (up from 75% last year)
One particular use of VLANs (we have 27) is to provide a management
subnet fo accessing network devices such as switches & routers
~ 130 servers connected at 100Mbps