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S2989G-24TX Operation Manual

Chapter 6 Security Function Configuration

6-96

 If the command of redirect attribute url-after-login value is configured, the

configured page url can be pushed automatically after the authentication; if that

command is not configured, the page that the user access before the authentication

can be pushed.

 Check if the page before the authentication or the pushed page appointed by

command exists, if not, the page cannot be accessed after pushing.

6.12

QoS

6.12.1

Introduction to QoS

QoS (Quality of Service) is a set of capabilities that allow you to create differentiated

services for network traffic, thereby providing better service for selected network traffic.

QoS is a guarantee for service quality of consistent and predictable data transfer service

to fulfill program requirements. QoS cannot generate extra bandwidth but provides more

effective bandwidth management according to the application requirement and network

management policy.

6.12.1.1 QoS Terms

QoS: Quality of Service, provides a guarantee for service quality of consistent and

predictable data transfer service to fulfill program requirements. QoS cannot generate

new bandwidth but provides more effective bandwidth management according to the

application requirement and network management.

QoS Domain: QoS Domain supports QoS devices to form a net-topology that provides

Quality of Service, so this topology is defined as QoS Domain.

CoS: Class of Service, the classification information carried by Layer 2 802.1Q frames,

taking 3 bits of the Tag field in frame header, is called user priority level in the range of 0 to

Figure 6-35 CoS priority

ToS: Type of Service, a one-byte field carried in Layer 3 IPv4 packet header to symbolize

the service type of IP packets. Among ToS field can be IP Precedence value or DSCP