colo network topologies

Not quite sure if this is the type of information people share, but I was wondering if people could post diagrams of their network topologies (or PM them to me?)?

I am getting a full colo rack in about a week and I still have not decided on switches, where to put a firewall (whether to buy a hardware firewall or use freebsd/openbsd solution - on each machine or between the switch and the drop), how exactly to connect the web servers to the db servers, etc.

I have a fuzzy picture in my mind of how it could be set up, but I wish I could see how other people have colos set up.

I will have maybe 6-7 stand alone web servers, a qmail server and then a few db servers.

We host a specific web application for our customers so this will not be a "typical" web hosting environment because we will be the only people with control of the servers. I don't know if that matters or not in the design. Web servers will be freebsd, db servers mysql (probably on freebsd).

Thanks for any help you can offer.

 

 

 

 

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