[tcng] exceeding child bandwith only in special cases ?

[raptor <raptor@xxxxxxxxxx>]

I was rereading tcng docs... and think i found a possible solution to a scenario i want to implement...i.e.

I want to create channel with rate 64kb/s but be able to jump to 128kb/s if the traffic is destinated to the proxy server... (all other traffic must not exceed 64kb/s)... pseudo-code :


{...
	if src == 192.168.0.1  {  
	  if dst == 192.168.0.15 and class1 has-no-bandwith-available 
		{  class1(rate 64kbps)   }
         else{ class2(rate 64kbps)  }
      } else class1(rate 64kbps)
...
}


i.e only when class1 bandwith is exausted and the traffic is destinated to proxy give another 64kb/s. (if not exhausted use it, if exausted but not destinated to proxy then sorry)
I know that it can possibly be achieved with the Metering primitives, but can figure it out yet.. could u help me..

One other question in this case should classes be parent and child i.e.:

class2(rate 128) {
  class1(rate 64)
}

or siblings :

class1(rate 64) {}
class2(rate 64) {}

which seems more apropriate for the case...

Thanx alot

raptor
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