The Cisco IT LAN team in San Jose builds and manages the Cisco Headquarters' 900 switches and 200 routers. Over time they have reached almost 99.999% availability on their network. This technical 39-page PDF describes in detail how the Cisco IT LAN team did it, including:
- Measuring availability and using outage alerts and change management to track progress
- Designing the physical and logical network for optimal availability
- Providing redundancy and UPS on critical devices to increase reliability
- Selecting the most reliable IOS code release (this section alone makes the paper worthwhile!)
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