Thanks, that's exactly what I was looking for. I was under the impression
that 0xabcd was the default, but I wasn't really sure.
The really odd thing here is that when I use 0x0000, 0xFFFF, 0xAAAA, or just
about any other combination, I get a 100% success rate. However, when using
the default of 0xABCD and 1000-byte packets, I only get a success rate of
around 90%. Weird, huh?
I'm starting to think the solution to this will be something that we don't
expect.
>
> > When conducting ping tests from one of our remote routers, I
> get anywhere from 5-13% packet loss when using the default ping
> payload, yet when I change the payload to anything else--such
> as all ones, all zeroes, alternating ones and zeroes--I get no
> packet loss whatsoever.
>
> > This holds true regardless of packet size. However, when
> using the default data pattern, larger packets get dropped more
> often than smaller packets. We are seeing zero input or output
> errors on this interface.
> >
> > This seems VERY strange to me, but I think I'll get closer to
> an answer when I find out what the default pattern is.
> >
> > Do any of you know what that is?
>
> If you were going from a Cisco router to a Cisco router, it
> would look like this(watch wrap on all links):
>
> http://www.west-
> point.org/users/usma1983/40768/Chesinc/docs/CiscotoCisco.txt
>
> If you were pinging from a Winthing to a Cisco device, it might
> look like this:
>
> http://www.west-
> point.org/users/usma1983/40768/Chesinc/docs/WinthingtoCisco.txt
>
> You will note that the results vary based upon the operating
> system involved. For a Cisco device, the repeating pattern is
> the following in binary:
>
> 1010101111001101
>
> Which in hex is ABCD. You can vary the pattern to any four
> value hex character combination that you choose. Obvious
> choices would be 0x0000 or 0xFFFF or maybe 0xAAAA (equal mix of
> ones and zeros in the payload). Of course, you will need to be
> in priviledge mode to do an extended ping and ensure you
> choose "extended commands".
>
> HTH,
>
> Paul Werner
>
>
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