Bounded Traffic

Hi,

I am trying to strictly bound the unknown nocat traffic by adding the
option "bounded" at the end of the tc class command line...

tc class add dev $InternalDevice \
   parent 1:1 classid 1:400 htb rate 500kbit ceil 1mbit unknown
                                                                                                                                         However, it gives me this error message...

What is "bounded"?
Usage: ... qdisc add ... htb [default N] [r2q N]
 default  minor id of class to which unclassified packets are sent {0}
 r2q      DRR quantums are computed as rate in Bps/r2q {10}
 debug    string of 16 numbers each 0-3 {0}
 
.. class add ... htb rate R1 burst B1 [prio P] [slot S] [pslot PS]
                      [ceil R2] [cburst B2] [mtu MTU] [quantum Q]
 rate     rate allocated to this class (class can still borrow)
 burst    max bytes burst which can be accumulated during idle period
{computed}
 ceil     definite upper class rate (no borrows) {rate}
 cburst   burst but for ceil {computed}
 mtu      max packet size we create rate map for {1600}
 prio     priority of leaf; lower are served first {0}
 quantum  how much bytes to serve from leaf at once {use r2q}
 
TC HTB version 3.3

Does my version not support the "bounded" option?  

Thanks,
Joe