MP-202 Telephone Adapter 64 Document #: LTRT-50605
User's Manual
Configure the following fields:
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.
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 dis-
tributed 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.
Policy
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.
8.1.2.1 Class Rules
Class rules define which packets belong to the class. They must be defined in order to
associate packets that meet them with the shaping class. Without class rules, the shaping
class will have no effect whatsoever. Each class can have outbound and/or inbound rules,
for outgoing and incoming traffic respectively. For example, you can define that all outgoing
packets from computer A in your LAN belong to your VoIP class. These packets will be
limited to the class settings (bandwidth, schedule, etc.). In addition, you can define the
traffic protocol and priority for each rule (this is not mandatory as in Traffic Priority rules).
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