[LARTC] Multiple shaping on a single physical interface

[Daniel L. Miller]

Daniel L. Miller wrote:
> I have a Linux box connected to a simple DSL router (along with other 
> machines on the home network).  This box is intended as an off-site 
> storage server for my office.  Taking advantage of some rsync scripts, 
> I have a very simple yet complete off-site backup solution.  My 
> question is in bandwidth management.
>
> I want to use this box for other purposes.  It has a single NIC, 
> connected to the switch/router.  Operating within my home LAN, I 
> should be able to communicate with it at the typical full-duplex 
> 100BaseT speeds.  However, when it's involved in the archive process, 
> the DSL connection (5M/512k) get saturated.  I wanted to setup some 
> sort of shaping on this box to control how much of the DSL connection 
> it consumes.
>
> I initially went to wondershaper/ctshaper - but I realized that this 
> is actually going to hurt me.  With ctshaper enabled, with the DSL 
> tuned settings of 5M/512k - I've absolutely crippled its ability to 
> communicate with the LAN.
>
> How can I achieve the clean communication with the DSL, reserving some 
> available bandwidth for other purposes - yet leave communication with 
> the local network at full?  Do I need to define multiple virtual 
> interfaces?
It just hit me that this is probably incorrect in my particular case - 
since I'm using OpenVPN for the conenction I can apply the throttling to 
the tap interface.  But - my question still remains how I would go about 
doing this type of control if I were actually using just the one interface.

Daniel