Network graph visualizer

I need to get a 2d pi开发者_如何学Gocture of a network graph. I know the topology. Is there any tool which will help me do so?

Graphviz

There are some open source tools written in Java here.

Yep graphviz is the de facto tool for this. You do not need to look any further. Just use your programming language of choice to spit out a dot file which describes your network. You can drop to programatic definition of graphs using graphviz but that is another issue.

Dot files are nice and simple, anyone could write one.