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LAN latency and bandwidth measurement software

Is there any software that can measure a 100 MBbps LAN latency end to end, also measure estimated bandwidth if possible ?
I prefer under windows.  I am once use Ping Plotter, it quit effective for measuring WAN connection, but if I use to measure LAN it always fall in 1 ms,  I need more detail time to esimately measure my network packet delivery latency.

Thank you
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bgulliano
Asked:
bgulliano
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1 Solution
 
rhandelsCommented:
Hi,

You have a few options if this is only one connection (if you need to scan the entire network, you will need to go to the big "professional" programs like Cisco works or Sniffler).

1. Use the Windows Network Monitor (you can install it using add remove Windows Components)
2. Install the MRTG engine (this is normally used to check traffic that runs through a router, but can scan 1 network connection very good).
3. Use Microsoft Perfromance Monitor
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Tim HolmanCommented:
<1 ms is good !
The only reason you'd want to accurately dip beneath this would be if you're running VoIP, which requires a maximum latency of 0.3 ms (300 microsecs) to ensure voice calls are of adequate quality.
To measure latency to this degree, you really need a hardware device to send, and a hardware device at the other end to reflect a range of packet sizes.  Commercial operating systems (esp Windows) aren't any good for this - you really need a good L2 device.  eg a network analyser from Fluke, or hardware based Sniffer device.

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bgullianoAuthor Commented:
Oh, is there any software  that calculate latency from ping packet (may be under linux ) ? because investing hardware is very expensive.
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Tim HolmanCommented:
There are plenty of software probes that can do this, but they will all be limited to the <1ms measurement that your pings are:

http://www.caida.org/tools/taxonomy/performance.xml

SmokePing running on Linux is probably about the best you can get for free:

http://people.ee.ethz.ch/~oetiker/webtools/smokeping/

..but seeming operating systems will add to latency then they will never be 100% accurate, and you need something that can measure at layer 2 to work out how fast frames can go, rather than layer 3 or above, as you have packet generation overheads at this point.

I would be more than happy with <1ms latency !  :)
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