[108647] in North American Network Operators' Group

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Network topology

daemon@ATHENA.MIT.EDU (Colin Alston)
Wed Oct 15 12:29:43 2008

Date: Wed, 15 Oct 2008 18:29:32 +0200
From: Colin Alston <karnaugh@karnaugh.za.net>
To: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org

Hi all

I'm considering trying to come up with some means to automatically 
detect a networks topology and draw pretty pictures. This is somewhat 
boring though if a network isn't well arranged with VLANs and q-tag 
trunk routers and so on (It will just look like a big cloud of junk 
connected off an assumed switch).

Is there any kind of cunning trick to detect standard layer2 switches 
along a path without stuff like STP?




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