"The complexity of network administration increases with the
size of the network being managed. It's relatively easy to keep a
good deal of information about a small network in your head, but
when your network grows in size beyond about six routers or so, it
makes good sense to maintain documentation that describes it."
"The most important piece of network documentation is the
network diagram. It is possible to capture a wide variety of
important information on a diagram including the topology of the
network, network device types, assigned network addresses, names of
routers and important hosts, physical location of hosts and network
equipment, contact telephone numbers, and on and on."
"As a diagnostic resource the network diagram is essential.
So I thought this month I'd take a quick look at some useful
open-source tools available for Linux that will allow you to create
and maintain useful network diagrams."