Qos Supported By The 4210 Series Ethernet Switches; Introduction To Qos Features; Traffic Classification - 3Com 4210 9-Port Configuration Manual

QoS Supported by the 4210 Series Ethernet Switches

The 4210 series Ethernet switches support the QoS features listed in
Table 1-1 QoS features supported by the 4210 series Ethernet switches
Category
Traffic
classification
QoS action
Congestion
management

Introduction to QoS Features

Traffic Classification

Traffic here refers to service traffic; that is, all the packets passing the switch.
Traffic classification means identifying packets that conform to certain characteristics according to
certain rules. It is the foundation for providing differentiated services.
In traffic classification, the priority bit in the type of service (ToS) field in IP packet header can be used to
identify packets of different priorities. The network administrator can also define traffic classification
policies to identify packets by the combination of source address, destination address, MAC address, IP
protocol or the port number of an application. Normally, traffic classification is done by checking the
information carried in packet header. Packet payload is rarely adopted for traffic classification. The
identifying rule is unlimited in range. It can be a quintuplet consisting of source address, source port
number, protocol number, destination address, and destination port number. It can also be simply a
network segment.
Features
Incoming traffic classification
based on ACLs of the
following types:
Basic ACLs
Advanced ACLs
Layer-2 ACLs
QoS actions for packets
matching the specified ACL:
Priority marking
Traffic policing
Traffic redirecting
Traffic accounting
Traffic mirroring
QoS actions directly
configured as required:
Priority trust mode
Line rate
Burst
WRR, and HQ-WRR queue
scheduling algorithms
For detailed information about ACLs, refer to
the ACL module in this manual.
For information about traffic classification,
refer to Traffic
For information about priority marking, refer
to Priority Marking.
For information about traffic policing, refer to
Traffic Policing
For information about traffic redirecting, refer
to Traffic Redirecting.
For information about traffic accounting, refer
to Flow-Based Traffic
For information about traffic mirroring, refer
to Traffic Mirroring.
For information about priority trust mode,
refer to Priority trust
For information about line rate, refer to
Rate Limiting.
For information about the burst function, refer
to Burst.
For introduction to WRR, and HQ-WRR queue
scheduling algorithms, refer to
Scheduling.
1-3
Table 1-1.
Refer to...
Classification.
.
Accounting.
mode.
Queue
Port