Date: Thu, 14 May 1998 18:23:03 +0200 (MET DST) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: isp@FreeBSD.ORG Cc: luigi@labinfo.iet.unipi.it (Luigi Rizzo) Subject: Bandwidth limiter available Message-ID: <199805141623.SAA00965@labinfo.iet.unipi.it>
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Ok guys, i have added all features i wanted to the dummynet package
(a bandwidth limiter and testing tool), and now it should be safe
to use. What i need is people testing it other than me... so why
don't you fetch a copy and try it ?
Description and diffs for 2.2.6 are at
http://www.iet.unipi.it/~luigi/ip_dummynet/
and hopefully the port to other versions should be straightforward.
Because it is configured with "ipfw", its use should be simple. E.g.
consider a web server with multiple aliases, you can allocate bandwidth
in the following way:
# first virtual server...
ipfw pipe 1 config bw 256Kbit/s
ipfw add pipe 1 ip from my-alias-1 port 80 to any
# second virtual server...
ipfw pipe 2 config bw 128Kbit/s
ipfw add pipe 2 ip from my-alias-2 port 80 to any
# third virtual server...
ipfw pipe 3 config bw 64Kbit/s
ipfw add pipe 3 ip from my-alias-3 port 80 to any
# make ICMP packets very slow...
ipfw pipe 4 config bw 16Kbit/s delay 200ms
ipfw add pipe 3 icmp from any to any
and for simulation purposes, if you want to see the effect of a
peculiar asymmetric line:
ipfw pipe 5 config bw 2Mbit/s delay 100ms # downlink
ipfw pipe 6 config bw 128Kbit/s delay 300ms # uplink
ipfw add pipe 5 ip from not my_ip to my_ip
ipfw add pipe 6 ip from my_ip to any
have fun...
cheers
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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