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-Traffic Shaper For Linux
-
-This is the current BETA release of the traffic shaper for Linux. It works
-within the following limits:
-
-o Minimum shaping speed is currently about 9600 baud (it can only
-shape down to 1 byte per clock tick)
-
-o Maximum is about 256K, it will go above this but get a bit blocky.
-
-o If you ifconfig the master device that a shaper is attached to down
-then your machine will follow.
-
-o The shaper must be a module.
-
-
-Setup:
-
- A shaper device is configured using the shapeconfig program.
-Typically you will do something like this
-
-shapecfg attach shaper0 eth1
-shapecfg speed shaper0 64000
-ifconfig shaper0 myhost netmask 255.255.255.240 broadcast 1.2.3.4.255 up
-route add -net some.network netmask a.b.c.d dev shaper0
-
-The shaper should have the same IP address as the device it is attached to
-for normal use.
-
-Gotchas:
-
- The shaper shapes transmitted traffic. It's rather impossible to
-shape received traffic except at the end (or a router) transmitting it.
-
- Gated/routed/rwhod/mrouted all see the shaper as an additional device
-and will treat it as such unless patched. Note that for mrouted you can run
-mrouted tunnels via a traffic shaper to control bandwidth usage.
-
- The shaper is device/route based. This makes it very easy to use
-with any setup BUT less flexible. You may need to use iproute2 to set up
-multiple route tables to get the flexibility.
-
- There is no "borrowing" or "sharing" scheme. This is a simple
-traffic limiter. We implement Van Jacobson and Sally Floyd's CBQ
-architecture into Linux 2.2. This is the preferred solution. Shaper is
-for simple or back compatible setups.
-
-Alan