software to calculate delay

[atout001]

Hi,

I was wondering if someone has a good software on Linux (Ubuntu) to calculate delay?

I would like to calculate the delay between to computers connected with a PIX firewall and a router without ACL and in another network only with a router with ACL.
http://img848.imageshack.us/img848/4142/55609391.png

So if someone has some advice for the software to use it will be awesome.

Thanks

[ua549]

A ping and trace route will give you latency times though they are not too effective on a local LAN due to the millisecond granularity.

[atout001]

Hi,

I will need one which is very precise. I saw that D-ITG or MGEN can do it.

[nihil]

Hello, and welcome to AO:)

I don't really understand what you are trying to achieve here, so some clarification of yoiur objectives might help?

From what I can see from your diagram, you are looking at the difference between a router with access control list and an external (stand alone) firewall? Well I can tell you that...........the firewall solution is slower because it has to negotiate both the PIX and the router.

Biggest flaw that I can see in your proposed test is the internet cloud................. my connections can vary in a matter of seconds, so I would not consider it to be a reliable metric at all, as you do not have control over all the elements.

Personally I would just place a dumb server at the exit and measure to that..............at least that is a level playing field, which the internet certainly is not.

And why so "accurate"???????????? why would a few milliseconds matter when you have a luser between chair and keyboard?

:confused: