Date: Wed, 6 Dec 1995 08:18:54 +0100 (MET) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: hackers@freebsd.org Subject: How big are queues on a typical router ? Message-ID: <199512060718.IAA17205@labinfo.iet.unipi.it>
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I have a (hopefully simple) question: how big is, typically, the queue (I mean, the place where incoming IP segments can be stored after being received and before being processed/delivered) in a router ? Is there any relation between the queue size and the line speed ? I am asking because during some tests (on a connection which apparently goes through a ~256Kbit/s line) I experienced large packet losses, yet an upper bound on the RTT of about 1.2s compared to a lower bound of ~.3s . This makes me think that the queue on the routers is about 1s-worth of data (approx 32KB). Is this correct ? Thanks Luigi ==================================================================== Luigi Rizzo Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it Universita' di Pisa tel: +39-50-568533 via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 http://www.iet.unipi.it/~luigi/ ====================================================================
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