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Re: [ippm] Next version of the duplicate draft
Hi,
On 2008-7-1, at 15:51, ext Henk Uijterwaal wrote:
so this says that the source and destination IP address need to be
the same for packet to be duplicates, but it's still vague about
which fields in the next header ("transport" header, usually) need
to be identical. I'm not convinced that this text will lead to
implementations that will come up with the same measurement results
for the same packet sequence. Can we be more precise?
I think it does as long as you don't look at any other fields than
source,
destination and information.
Each packet has source, destination, a bunch of other headers and
finally
the information that it carries. On the receiving side, one records
the
packets and for each arriving packet, one checks if one has arrived
before
with the same source, destination and information (within the time-
out
interval). If so, it is a duplicate. If not, it isn't.
so what if there is no information, such as with pure TCP ACKs?
I wonder - since IPPM is doing metrics for IP - if we can define
duplication only in terms of the IP header fields?
Lars
The real question, I think, is whether there can be cases where the
source
intentionally sends multiple packets with the same src, dst and
information
(but something different in the other headers).
Henk
--
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Henk Uijterwaal Email:
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