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. Bora -----Original Message----- From: Robert Tsay [mailto:cctsay@globalcenter.net] Sent: Thursday, October 21, 1999 5:28 PM To: Bora Akyol; 'Sean Donelan'; nanog@merit.edu Subject: Re: Traffic engineering tools After the investigation, currently only WANDL in the market can do/support the MPLS+ATM or IP simulation. So the bad thing is the software is very expensive. It's the only software that can simulate Constraint-Based routing now. R. ----- Original Message ----- From: Bora Akyol <akyol@pluris.com> To: 'Sean Donelan' <sean@donelan.com>; <nanog@merit.edu> Sent: Thursday, October 21, 1999 2:25 PM Subject: RE: Traffic engineering tools
I believe that WANDL has a tool that can be used for static TE purposes, but you are on your own for traffic models.
Bora Akyol Pluris, http://www.pluris.com
-----Original Message----- From: Sean Donelan [mailto:sean@donelan.com] Sent: Wednesday, October 20, 1999 11:21 PM To: nanog@merit.edu Subject: Traffic engineering tools
At NANOG the lack of traffic engineering tools came up. Has anyone heard of any packages coming to market. Or looked if tools from other industries could be used as a starting point. Anything from the electric power transmission or road traffic world we could use? Or do IP packets have such different properties (e.g. re-transmission, independent next-hop behavior, etc), its not a good idea to even try.
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." \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
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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participants (3)
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Patrick Greenwell -
Prabhu Kavi