ping command question

[Bill Moran]

adrian kok <adriankok2000 at yahoo.com.hk> wrote:
> Hi all
> 
> Do you know why the command "ping" in unix and window
> is different?

Yes.

> I start from one ISP to ping other ISP
> 
> 1/ If the following result from window, it is good or
> not?
> lost = 7 within 3 thousand packets

No, that's not good.  There's no reason to be losing any
packets, unless there's a network problems.

However, depending on who those two ISPs are and how far
away from each other, that may be acceptable.

> 2/ how do I kow the average ms is good or not?

Is it fast enough?

> 3/ Which one (unix or window) is best for testing?

The Unix one.  Last I checked, the windows one rounded off
the RTTs, thus making it inaccurate for testing.

> Thank you very much for your advice
> 
> Reply from 66.49.4.148: bytes=32 time=99ms TTL=57
> Reply from 66.49.4.148: bytes=32 time=109ms TTL=57
> Reply from 66.49.4.148: bytes=32 time=100ms TTL=57
> Reply from 66.49.4.148: bytes=32 time=95ms TTL=57
> 
> Ping statistics for 66.49.4.148:
>     Packets: Sent = 3534, Received = 3527, Lost = 7
> (0% loss),
> Approximate round trip times in milli-seconds:
>     Minimum = 89ms, Maximum =  640ms, Average =  102ms
> Control-C

It seems like you've got a LOT of variation.  Either your sharing that net
connection with a lot of other services, or you've got problems.

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com