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Re: Improving the data supplied by BPF

"Arnaud Lacombe" <> writes:

>>>what if the count goes from 3 to... 3, ie. the seq number overflowed
>>>(for whatever reason) ?
>> Highly unlinkely.
> 2^32 1500-bytes packets is about 6TB of data, on 100Mbit link, the
> sequence number will wrap after 5.6 days (if you consider
> uni-directional traffic), on a 1Gb link, half a day and a bit more
> than 1 hour on a 10Gb link. This is the worst case scenario. Two
> records taken at the <wrap_time> interval will likely collide on
> high-load link.

Will they?  Wouldn't you have to not sample for a whole <wrap period>
for it not to be immediately obvious that a wraparound had occurred?

Is an application which wants to fill a 100MB link, but not sample more
than once every five days what we should be designing for?

                                Jim Wise

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