When you notice that 'anonymous networks' are appearing, it means that InterMapper is encountering a transient interface on a device (or devices). Here's how it is supposed to work:
InterMapper discovers a new IP address on a box associated with some ifIndex, so IM creates a link to a new network to represent the new subnet. On the next scan of the device's static configuration (if you don't cmd-K, this will take place 6 hours later), InterMapper determines that the IP address is no longer there, so the link to the new network is removed, and the network becomes anonymous. (Note that the 'network' gets its 'subnet numbers' from the adjacent links. If the link goes away, the subnets go away, but the network remains. I'm terming this anonymous because it is both unnumbered *and* isolated.)
InterMapper does not remove the anonymous networks for you; you can select them in edit mode and press Backspace. InterMapper's current implementation will never reuse them. In an earlier version (several years ago), we did remove the anonymous networks for you, but this didn't prevent transient interfaces from causing confusion.
With that background, I have seen our "Snow Apple Airport" cause anonymous networks in 4.1.2 -- I am looking into that. There is always the possibility that we have introduced a bug which is causing normal interfaces to be treated as transient. The only way to catch a device that is doing this, is to select it and type cmd-K, then quickly watch to see if it causes a new network oval to be created. InterMapper doesn't log when new links are created/destroyed; this will be addressed in a future version.
Hope this makes sense,
Bill Fisher Dartware, LLC http://www.dartware.com
On Jan 5, 2004, at 1:58 PM, Doug Weathers wrote:
Hi,
After upgrading to IM 4.1.2 Traditional on OS X, little network circles have been showing up on some (but not all) of my maps.
They're not connected to anything, and they show up as unnumbered segments without a network address. They arrange themselves in a vertical column somewhere in the center of the map.
They seem to only show up on maps that contain Cisco equipment * but
I have a couple of maps with Cisco gear on it that haven't spawned these
little networks.
The maps with the extra networks seem to be the ones that I leave as the frontmost window. The ones that haven't grown extra networks tend to sit behind the other windows.
Has anyone else seen this behavior?
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