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Re: How to verify speed of a 1Gb/s network?



On 4/27/06, Joel Jaeggli <joelja darkwing uoregon edu> wrote:
On Fri, 28 Apr 2006, Mike McCarty wrote:

> Joel Jaeggli wrote:
>> On Fri, 28 Apr 2006, Tim wrote:
>>
>>> On Wed, 2006-04-26 at 19:32 -0700, Rob wrote:
>>>
>>>> Am I right, that the throughput here is 1 Giga BYTES,
>>>> which is 8 Giga bits?
>>>
>>>
>>> Network card speeds are listed in bits per second.  These are the three
>>> most common speeds:
>>>
>>> 10 mega bits per second
>>> 100 mega bits per second
>>> 1 giga bits per second
>>>
>>> Don't ask me whether they're playing the SI or bullshit game regarding
>>> mega and giga equalling millions and billions, or using 1024
>>> multipliers.
>>
>>
>> Bits are in fact bits in this case. When you talk about packets or frames
>> you tend to use bytes or octets (same thing) but line rate is bits per
>> second.
>
> I think the issue raised was whether 1 Gbps is 1024*1024*1024 bps or
> 1000*1000*1000 bps.

1 billion bits per second is 1*10^9 bits, contrast with 2^30 bits which bc
says is 1073741824

http://en.wikipedia.org/wiki/Gigabit

> Mike
>

--
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Joel Jaeggli           Unix Consulting         joelja darkwing uoregon edu
GPG Key Fingerprint:     5C6E 0104 BAF0 40B0 5BD3 C38B F000 35AB B67F 56B2


The OP should look up IEEE 802.3 and the formulation of the various
packets/frames in the standard. Using the ping data and etheral(?) he
can reconstruct each frame, count the data transmitted/received per
unit time and computed the throughput for his system.


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