Roger Oliver wrote: > Maybe not the best way but it has worked for me in the past. > > Enable CDP on all your network devices (Just for a little whlie). > > Now logon to each record the "CDP neighbor detail" output > > Pick a router/switch say "core-1" > How many CDP neighbors? > Which ports are they connected to? > Draw these connections on paper this is just a rough draft so a big box with > lines and labels is fine. > > Once you've done that pick one of these neighbors and see what they see and > so on. > > There are I am sure tones of better ways to do this. But when I go somewhere > to consult and they don't have clear documentation this is how I get started.
This is exactly how I do it too. I also verify everything visually. On my grand flowchart I also label interfaces and then go back to Visio and start drawing it. It's a slow tedious process but that's the only true way to determine the complete network topology. I've often non-CDP enabled devices on the network that complicate a CDP discovery. Detailing exactly what connects to where visually is the only safe bet. I've also used LAN Surveyor for a quick sanity check for before and after maintenance windows to make sure that we didn't accidentally lose a large portion of a network in the process. I'd recommend a manual check over an automated check any day of the week. Justin _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
