nanog mailing list archives

Re: Question about propagation and queuing delays


From: Valdis.Kletnieks () vt edu
Date: Sun, 21 Aug 2005 22:00:12 -0400

On Sun, 21 Aug 2005 18:38:32 PDT, David Hagel said:

Would there be any data out there on what fraction from this 60ms to
80ms RTT is raw propagation delay and what fraction is typical packet
queuing delay at intermediate switches? Does queuing delay play much
of a role at all these days? Or is it all just propagation delay?

Measure the distance, figure the signal is moving at 60% of the speed
of light, and anything over that is queueing/switching delay.

This of course assumes that you have some idea how the cable runs....

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