STP Visualization

David Freedman david.freedman at
Mon Nov 30 18:16:53 UTC 2009

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.

Brian Feeny 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

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