User`s manual
Table Of Contents
- Overview
- Accessing the Network Camera
- Using 3GPP-compatible Mobile Devices
- Using RTSP Players
- Using VIVOTEK Recording Software
- Main Page
- Client Settings
- Configuration
- System > General settings
- System > Homepage layout
- System > Logs
- System > Parameters
- System > Maintenance
- Media > Image
- Media > Video
- Media > Video
- Media > Audio
- Network > General settings
- Network > Streaming protocols
- Network > SNMP (Simple Network Management Protocol)
- Security > User Account
- Security > HTTPS (Hypertext Transfer Protocol over SSL)
- Security > Access List
- PTZ > PTZ settings
- Event > Event settings
- Applications > Motion detection
- Applications > DI and DO
- Applications > Tampering detection
- Applications > Audio detection
- Applications > VADP (VIVOTEK Application Development Platform)
- PIR
- Recording > Recording settings
- Local storage > SD card management
- Local storage > Content management
- Appendix
VIVOTEK
User's Manual - 93
Network > QoS (Quality of Service)
Quality of Service refers to a resource reservation control mechanism, which guarantees a certain
quality to different services on the network� Quality of service guarantees are important if the
network capacity is insufcient, especially for real-time streaming multimedia applications. Quality
can be dened as, for instance, a maintained level of bit rate, low latency, no packet dropping, etc.
The following are the main benets of a QoS-aware network:
■
The ability to prioritize trafc and guarantee a certain level of performance to the data ow.
■
The ability to control the amount of bandwidth each application may use, and thus provide higher
reliability and stability on the network�
Requirements for QoS
To utilize QoS in a network environment, the following requirements must be met:
■
All network switches and routers in the network must include support for QoS�
■
The network video devices used in the network must be QoS-enabled�
QoS models
CoS (the VLAN 802�1p model)
IEEE802.1p denes a QoS model at OSI Layer 2 (Data Link Layer), which is called CoS, Class of
Service� It adds a 3-bit value to the VLAN MAC header, which indicates the frame priority level from
0 (lowest) to 7 (highest)� The priority is set up on the network switches, which then use different
queuing disciplines to forward the packets�
Below is the setting column for CoS� Enter the VLAN ID of your switch (0~4095) and choose the
priority for each application (0~7)�
If you assign Video the highest level, the switch will handle video packets rst.
NOTE
► A VLAN Switch (802.1p) is required. The web browsing may fail if the CoS setting is incorrect.
► Class of Service technologies do not guarantee a level of service in terms of bandwidth and
delivery time; they offer a "best-effort�" Users can think of CoS as "coarsely-grained" traffic
control and QoS as "nely-grained" trafc control.
► Although CoS is simple to manage, it lacks scalability and does not offer end-to-end guarantees
since it is based on L2 protocol�
NOTE: