Introduction To Qos Features; Traffic Classification - 3Com 4200G 12-Port Configuration Manual

Table 1-1 QoS features supported by the Switch 4200G series
QoS Feature

Traffic classification

QoS actions
Congestion
management

Introduction to QoS Features

Traffic Classification
Traffic here refers to service traffic, that is, all the packets passing by the switch.
Traffic classification identifies packets conforming to certain characteristics according to certain criteria.
It is the foundation for providing differentiated services.
In traffic classification, the priority bits in the type of service (ToS) field in the IP header can be used to
identify packets of different priorities. You can also define traffic match criteria to classify packets by the
combination of source address, destination address, MAC address, IP protocol or the port number of an
application. Contents other than the header information in packets are rarely used for traffic
classification. You can define a class for packets with the same quintuple (source address, source port
number, protocol number, destination address and destination port number for example), or for all
packets to a certain network segment.
Description
Classify incoming traffic based on ACLs.
The Switch 4200G series support the
following types of ACLs:
Basic ACLs
Advanced ACLs
Layer 2 ACLs
The Switch 4200G series support
performing the following QoS actions on
traffic matching the specified ACL:
Traffic policing
Traffic shaping
Traffic accounting
You can configure the following QoS
actions for traffic separately as required on
the Switch 4200G series:
Priority trust mode
Protocol packet priority
Burst
The Switch 4200G series support SP,
WRR, and SDWRR for queuing and
support the following three queue
scheduling modes:
SP
SDWRR
SP+SDWRR
1-3
Reference
For information
ACLs, refer to the ACL
Operation and
Command manuals.
For information
traffic classification, refer
to Traffic Classification.
For information
traffic policing, refer to
Traffic Policing and Traffic
Shaping.
For information
traffic shaping, refer to
Traffic Policing and Traffic
Shaping.
For information
traffic accounting, refer to
Flow-Based
Accounting.
For information
priority trust mode, refer to
Priority Trust Mode.
For information
specifying priority
protocol packets, refer to
Protocol Priority.
For information about the
burst function, refer to
Burst.
For information about SP,
WRR, and SDWRR, refer to
Queue Scheduling.
about
ACL
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Traffic
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