User's Manual
65
February 2007
MP-202 Telephone Adapter
8. Quality of Service (QoS)
Table
8-2: Edit Class - Parameter Descriptions
Parameter
Description
Name
The name of the class.
Class Priority
The class can be granted one of eight priority
levels, zero being the highest and seven the
lowest.
Tx Bandwidth
The reserved transmission bandwidth (Committed
Information Rate, or CIR) , in kbps, for each class.
Rx Bandwidth
The reserved reception bandwidth (Committed
Information Rate, or CIR) , in kbps, for each class.
Policy
The class policy determines the policy of routing
packets inside the class. Select either:
1. Priority
2. FIFO
3. Fairness
4. RED
Refer to the following four descriptions.
Priority Priority queuing utilizes multiple queues
so that traffic is distributed among
queues based on priority. This priority is
defined according to packet priority,
which can be defined explicitly, by a
DSCP value, or by a 802.1p value.
FIFO
First In First Out. This priority queue
ignores any previously-marked priority
that packets may have.
Fairness The fairness algorithm ensures no
starvation by granting all packets a
certain level of priority.
RED
Random Early Detection. Utilizes
statistical methods to drop packets in a
‘probabilistic’ way before queues
overflow. Dropping packets in this way
slows a source down enough to keep the
queue steady and reduces the number of
packets that would be lost when a queue
overflows and a host is transmitting at a
high rate.
Schedule
By default, the class will always be active.
However, you can configure scheduler rules in
order to define time segments during which the
class may be active.