[Bloat] Random idea in reaction to all the discussion of TCP flavours - timestamps?

[BeckW at telekom.de]

Jim Wrote:
> Back last summer, to my surprise, when I asked Van Jacobson about my
> traces, he said all the required proof was already present in my traces,
> since modern Linux (and I presume other) operating systems had time
> stamps in them (the TCP timestamps option).
>
> Here's the off the wall idea.  The buffers we observe are often many
> times (orders of magnitude) larger than any rational RTT.
>
> So the question I have is whether there is some technique whereby
> monitoring the timestamps that may already be present in the traffic
> (and knowing what "sane" RTT's are) that we can start marking traffic in
> time prevent the worst effects of bloating buffers?
This reminds me of a related concept, using the TTL really as 'Time To Live' (in today's IP, it's more of a 'Remaining Hop Count). According to RfC 791, a router that buffers a packet by n seconds must decrease its TTL by n. I doubt that many routers implement this properly.

Wolfgang


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