Tutorials about network monitoring

The SNMP Protocol (part 1)
SNMP MIBs (part 2)
A foundation for network monitoring is the SNMP protocol. This is a 2-part article series introducing the SNMP procotol, SNMP MIBs and how to get started. A look at command line tools for checking and traversing SNMP OIDs in your devices is also included.

Points of monitoring
What are the important points that your system needs to supervise for your routers, switches and other devices. A how to guide for what you need to think of and how to treat different classes of equipment when you design your monitoring system.

Monitoring servers and network services
This tutorial deals with how to keep track of the health of your servers, and the services running on them like DNS, SMTP, POP3 and radius.

Spare parts and service agreements
How to set up a policy for dealing with and replacing broken equipment. In which cases is it most appropriate to have spare parts, and where should you instead rely on a service agreement with the equipment manufacturer.

Tutorials about network design

Internet connection redundancy (part 1)
Internet connection redundancy - multiple CPEs and multiple ISPs (part 2)
Internet connection redundancy - true multi homing (part 3)
A three part tutorial on how to connect to the Internet and achieve redundancy. Discusses when redundancy is needed and several different scenarios, depending on your needs. The first part discusses redundancy scenarious with a single service provider, the second part discusses how to connect to multiple providers and the usage of multiple CPE routers and the third part discusses true multi homing with provider independant IP adresses, an AS number and BGP for automatic failover. The third tutorial also goes into some details about how to design your network and setup servers and firewalls to continue the redundancy.