[SAGE] Availability Metric Reporting

["Shane B. Milburn" <milburn@panix.com>]

I'm trying to come up with a better reporting method for management on our
weekly/monthly/yearly System and Network availability. I haven't
been able to come up with any really good formulas or ways to
track how close to five 9s we get for servers and for networks.

Cisco has a book 'High Availability Network Fundamentals' which is
good but it really only helps calculate the hardware availablity.
I also need to track server and network availability from a "service"
perspective. We had all kinds of redundancy, so even if I loose a switch
in my network, the network is still functioning and the only affected
people are the clients directly attached to that failed component. Same
goes for my servers, since most are clustered.

How are the rest of you tracking and reporting on server and network
availability metrics?

thanks,
-shane
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Shane B. Milburn                           Email: milburn@panix.com
Sr Security & Network Engineer             GPG Key ID: 9DA907DA