On 09/29/2010 09:12 PM, Jon Elson wrote:
> Igor Chudov wrote:
>
>> Things may have somewhat improved.
>>
>> I checked on my unsophisticated home network. Ping time (roundtrip),
>> involving three switches (one in my basement office, then the main
>> switch at the main interconnect in the utility room, then the switch
>> in the family room), and two linux boxes, is 0.21-0.34 milliseconds.
>>
>>
> My understanding of ping is that it does NOT report the total round trip
> time through
> all nodes and switches, just the last hop. I think you need traceroute
> to see the delay
> at each hop. Still, 300 uS is not such a great time if you need 3
> messages to propagate
> within one millisecond.
>
> Jon
Jon,
True, but I would hope in our environment we are only one-hopping
the signal between the computer and the machine/controller.
Mark
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