T3 Latency

Sat Feb 17 16:19:09 UTC 2001

In message <Pine.LNX.4.10.10102171056510.4084-100000 at merlin.noc.adelphia.net>, 
Paul Bradford writes:
>
>Charles,
>   One thing I have a hard time explaining to some customers is that
>latency is one thing....  what does it tell me... it tells me that from
>one hop to another things are a bit slow.... the real important thing is
>how are you're throughput speeds... I started a thread a while back asking
>a similar question... is ping/traceroute a good measurement of throughput
>on the link?  the unanimous response was use pathchar or mtr or ttcp which
>all give you a better guestimate of how your link is doing performance
>wise..

Latency and packet loss both put an upper bound on throughput.  See,
for example, http://www.acm.org/sigcomm/sigcomm98/tp/abs_25.html
or draft-ietf-pilc-error-06.txt

		--Steve Bellovin, http://www.research.att.com/~smb