Class parameters

The following table shows which class parameters are supported by which queuing discipline, and whether they are optional ($\circ$) or required ($\bullet$):

Parameter	cbq	dsmark	gred	htb
allot	$\bullet$	.	.	.
avpkt	$\circ$	.	$\bullet$	.
bandwidth	$\bullet$	.	.	.
bounded	$\circ$	.	.	.
burst	$\circ$	.	$\bullet$	$\circ$
cburst	.	.	.	$\circ$
ceil	.	.	.	$\circ$
default	.	.	$\circ$	$\circ$
isolated	$\circ$	.	.	.
ewma	$\circ$	.	.	.
limit	$\circ$	.	$\bullet$	.
mask	.	$\circ$	.	.
max	$\circ$	.	$\bullet$	.
maxburst	$\circ$	.	.	.
min	$\circ$	.	$\bullet$	.
minburst	$\circ$	.	.	.
mpu	$\circ$	.	.	.
prio	$\circ$	.	$\circ$	$\circ$
probability	.	.	$\circ$	.
rate	$\bullet$	.	.	$\bullet$
value	.	$\circ$	.	.
weight	$\circ$	.	.	.

Classes of ingress and prio have no parameters and have therefore been omitted from the above table.

Units and meaning of parameters we haven't already described in the queuing discipline section:

Parameter	Unit	Description
allot	Bytes	Sending credit when scheduled
bounded	flag	Class may not ``borrow'' bandwidth
cburst	Bytes	Burst exceeding ceil rate
ceil	bps	Maximum bandwidth a class can use
default	flag	Use this class if DP unknown or if classification fails
isolated	flag	Neither ``borrow'' or ``lend'' bandwidth
mask	integer	DS field mask
maxburst	pcks	Maximum burst while over-limit
minburst	pcks	Minimum burst when scheduled
prio	integer	Scheduling priority
value	integer	New DS field value
weight	bps	Scheduling weight