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RE: Shaping on a large scale
From: "C. Jon Larsen" <jlarsen () richweb com>
Date: Fri, 30 Jan 2009 10:40:23 -0500 (EST)

Open source you can do a custom setup with IPTables and iproute2, but it
will take some work to get the same kind of features and management
interface.  LARTC is a good reference for this kind of topic:
http://lartc.org/.  Also I'm not sure if someone has built this into any
of the firewall specific linux distros yet, so you may want to explore
those a little.

The scripts below will set max bandwidth on an interface to 60mbit, and setup a queue to shape a.b.c.d to 3Mbit. Seems to work ok for me. Its used on a physical server to limit bandwidth to a virtual server(s) on the physical server. Should work just as well on a dual-armed router/firewall shaping devices behind it. You would just create more classes (1:11, 1:12, etc) for more clients/ips to shape and you might want to knock the ceiling on the default (1:30) class down to guarantee the bandwidth to the 1:10, 1:11...classes.

tc qdisc add dev eth0 root handle 1: htb default 30

tc class add dev eth0 parent 1: classid 1:1 htb rate 60mbit burst 150k
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 3mbit burst 15k
tc class add dev eth0 parent 1:1 classid 1:30 htb rate 1kbit ceil 60mbit burst 150k

tc qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10
tc qdisc add dev eth0 parent 1:30 handle 30: sfq perturb 10

## limit a.b.c.d to 3mbit/sec:
U32="tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32"
$U32 match ip src  a.b.c.d/32 flowid 1:10
$U32 match ip dst  a.b.c.d/32 flowid 1:10

tc -s -d qdisc show dev eth0

-----Original Message-----
From: Bruce Grobler [mailto:bruce () yoafrica com]
Sent: Friday, January 30, 2009 12:34 AM
To: nanog () nanog org
Subject: Shaping on a large scale


Does anyone know of  any Shaping appliances to shape customers based on
IP, allow for a quota per IP and qos mechanisms like LLQ?,  This is
should be something that can sit in between two border router's and
support a small ISP (20000 customers), also an opensource solution would
be great!

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