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Date:      Mon, 9 Sep 2002 14:07:56 +0200
From:      Wim Livens <wim@livens.net>
To:        Wim Livens <wim@livens.net>
Cc:        freebsd-isp@freebsd.org
Subject:   Re: Network diagrams
Message-ID:  <20020909120756.GA34577@krijt.livens.net>
In-Reply-To: <20020905145940.GA87075@krijt.livens.net>
References:  <20020905145940.GA87075@krijt.livens.net>

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Thanks for the reactions so far.  Most of you suggested tools that
discover the topology and then visualize it.  But what I'm really
looking for is something that takes some topology data as input and
outputs a png (or even ascii:-)) file with a network diagram.  A bit
like dot but specialized for IP networks instead of just graphs in
general.

An input file could look something like:

1.2.3.1     quick   FastEthernet2/0/0       1.2.3.0/30
1.2.3.2     flupke  FastEthernet2/0/0       1.2.3.0/30
1.2.3.13    suske   FastEthernet0/0         1.2.3.12/30
1.2.3.14    wiske   FastEthernet0/0         1.2.3.12/30
1.2.3.41    quick   Serial1/1/0.1/1/4/2:0   1.2.3.40/30
1.2.3.42    suske   Serial1/0:0             1.2.3.40/30
1.2.3.45    flupke  Serial1/1/0:0           1.2.3.44/30
1.2.3.46    wiske   Serial1/0:0             1.2.3.44/30

plus hints for placing the nodes (like coordinates).

This example should give a picture of a square of routers connected
with subnets, showing IP addresses and interfaces.

I've already made a perl script to convert such input to dot but
e.g. the placement of labels in dot is poor.  I think I will have to
do everything myself using just GD.pm, but I rather check first what's
available.

Wim.

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