On Mon, Nov 30, 2009 at 06:16:53PM +0000, David Freedman wrote:

I wrote a perl/libgd tool some time ago which acts as a cgi script and takes live data and makes pretty pictures of it (per vlan). Note due a bunch of stuff not being uniformly implemented in IOS via SNMP I've had to screen scrape a little and I'm afraid this means I don't have any CatOS support.

Let me know offlist if you are interested in the code.

I have something to do this as well, using perl to grab all the details via SNMP, and then visualization using GraphViz. You're welcome to use it to start with: http://net.doit.wisc.edu/~plonka/stpgraph/ There's a sample PDF in the "examples/" sub-dir. Dave P.S. I know initially you request a "good tool", which is in the eye of the beholder. This one will want a programmer's eye, I guess. -- plonka@cs.wisc.edu http://net.doit.wisc.edu/~plonka/ Madison, WI

Although that looks like a pretty cool visualization program, I does not have the ability to automatically grok STP info via snmp/ssh/ telnet/cdp/etc. I am looking for a program to do the work of showing me STP forwarding paths on a per vlan basis, it doesn't have to be pretty, just something that can do it. Brian On Nov 30, 2009, at 2:15 PM, Will Clayton wrote:

Graphviz?

On Mon, Nov 30, 2009 at 11:07 AM, Brian Feeny <bfeeny@mac.com> wrote:

Can anyone recommend a good tool for spanning tree visualization? I am needing to get a good visual depiction of forwarding for many vlans, across 4 core switches. Two of them are CatOS, 2 are IOS, root is different for many of the vlans, lots of port costing in place, in other words it would take a while by hand.

Thanks,

Brian