Solarwinds had an IPO today which is significant for a couple of reasons. The economy as we know is not in good shape so its important to see businesses have the ability to go out and raise capital. Any IPO, especially a technology related company is a great sign for our industry. On a more personal note is that I have been a user of Solarwinds products for several years now at various jobs throughout the years and really enjoy their ease of use and low cost of ownership. One of the best tools that Solarwinds puts out is the Orion monitoring tool.
Orion uses SNMP to monitor your devices on your networks, whether it is a switch, router, firewall, server, etc. Alerts can be set up to send emails when certain thresholds are met, such as volume size or memory utilization. This type of monitoring is much more proactive than just telling me if a server or device is up or down and gives a good overall view of the health of your infrastructure. The GUI is web-based and has a great reporting engine which is pulling from a database so you can see historically the uptime of a particular server, T1, or any other device you are monitoring over time. This is great to show disk usage and how it is growing over time in order to justify additional disk space.
The software is licensed on a per node basis. This means that if you want to monitor all of your interfaces on every switch plus all of your servers then your node count will be very high. Of course, you don't need to monitor every interface on your network. Concentrate on your high value interfaces such as uplink ports on your switches, your router interfaces, your firewall interfaces and critical servers to keep your node count down. It will take some planning but if you lay out what is most critical for you then you can dramatically cut the costs of this monitoring tool.