<<On Mon, 26 Nov 2001 08:43:56 -0600 (CST), Jonathan Lemon <[EMAIL PROTECTED]> said:

> Unfortunately, this is not calculated; we still rely on a static 
> (default 30sec) MSL quiet period.  Ideally, it should be possible to
> set MSL based on some multiple of RTT for the connection, and default 
> to a hard coded value if there are not enough samples to calculate RTT.

There is no way to `calculate' the maximum segment lifetime unless you
are omniscient.  It is assumed to be 30 seconds, but in reality can be
much, much more.  (As a result, TCP is theoretically broken, but the
situations in which this happens are rare enough to be masked by other
events.)  The RTT gives you the *critical path length* of the graph;
it does not have anything to do with the MSL except for trivial
(two-node) networks.

-GAWollman


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