[25604] in North American Network Operators' Group
Re: Traffic engineering tools
daemon@ATHENA.MIT.EDU (Prabhu Kavi)
Fri Oct 22 08:32:03 1999
Message-ID: <381058DF.75D45CBD@tenornetworks.com>
Date: Fri, 22 Oct 1999 08:30:23 -0400
From: Prabhu Kavi <prabhu_kavi@tenornetworks.com>
MIME-Version: 1.0
To: Patrick Greenwell <patrick@cybernothing.org>
Cc: Bora Akyol <akyol@pluris.com>,
"'Robert Tsay'" <cctsay@globalcenter.net>,
"'Sean Donelan'" <sean@donelan.com>, nanog@merit.edu
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Errors-To: owner-nanog-outgoing@merit.edu
Actually that time estimate is pretty accurate. When I was at Cascade,
I put together a program that did this in about a month. The program
was written in C++, with tcl used for command line entry, and SQL hooks
for accessing the Cascade topology database. If I took out the SQL hooks,
2-3 weeks would have been spot on.
In addition to doing traffic engineering analysis (including various
failure and reroute scenarios that modeled Cascade's circuit routing
algorithms), the program automatically populated its initial topology
with a SQL database from an actual network. A modification to translating
this to asymmetric IP flows would have been straightforward.
And no, I didn't take the code with me to my current company.
Prabhu
Patrick Greenwell wrote:
>
> On Thu, 21 Oct 1999, Bora Akyol wrote:
>
> >
> > If you don't want a GUI and the fancy what if scenarios, it is not difficult
> > to write
> > a Perl/Script that does constraint-based routing or Multi-commodity flow
> > problems.
> >
> > I would guess 2-3 weeks if one is familiar with basic linear programming.
>
> If I had a dime for everytime someone claimed that a piece of software
> offering such-and-such functionality could be written in X time
> period (where X is a few hours to a month)....
>
> When you have your hypothetical software written, please let me know. I'd
> love to check it out.
>
> /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
> Patrick Greenwell
> "This is our time. It will not come again."
> \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
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