Principles for LAN design
Simplicity
- Enet 10/100/1000 Mbps, phase out FDDI, LocalTalk etc.
- Reduce number of protocols in core to IP only, limit bridging, keep smart stuff at edges,
Stay away from edges of performance envelope
- over-provision, double aggregate every 18 months
- shared to switched 10Mbps => 100Mbps for desktop
- 100Mbps switched => 1Gbps for core & high vol. Servers
Provide high availability
- redundancy of core components so can schedule outages
- UPS
Invest in network management tools