89
6.23 QoS Configuration
Quality of Service (QoS) is the ability to provide different priority to different
applications, users or data flows, or to guarantee a certain level of performance to a
data flow. QoS guarantees are important if the network capacity is insufficient,
especially for real-time streaming multimedia applications such as voice over IP or
Video Teleconferencing, since these often require fixed bit rate and are delay
sensitive, and in networks where the capacity is a limited resource, for example in
cellular data communication. In the absence of network congestion, QoS mechanisms
are not required.
QoS Mode:
Select the QoS policy rule.
¾
Disable Qos Priority:
The default status of QoS Priority is disabled.
¾
High Empty Then Low:
When all the high priority packets are empty in queue,
low priority packets will be processed then.
¾
Highest:SecHigh:SecLow:Lowest=8:4:2:1:
The switch will follow 8:4:2:1 rate to
process priority queue from High to lowest queue. For example, while the system
processing, 1 frame of the lowest queue, 2 frames of the low queue, 4 frames of
the middle queue, and 8 frames of the high queue will be processed at the same
time in accordance with the 8,4,2,1 policy rule.
¾
Highest:SecHigh:SecLow:Lowest=15:7:3:1:
Having set this QoS mode, the
process order is in compliance with the transfer rate of 15:7:3:1.
¾
Highest:SecHigh:SecLow:Lowest=15:10:5:1:
Having set this QoS mode, the
process order is in compliance with the transfer rate of 15:10:5:1.
¾
Click
Apply
to have the configuration take effect.
802.1p priority [7-0]:
Configure per priority level. Priority 0 ~ 7: each priority has four
priority levels—Highest, SecHigh, SecLow, and Lowest.
Default Ingress Port Priority Mapping:
Configure the priority level for each port. The
port ingress level is between 0 and 7.
TOS/DSCP Priority Mapping:
The system provides 0 ~ 63 TOS priority level. Each
level has 8 priorities—0 ~ 7. The default priority for each port is 0. When the IP packet
is received, the system will check the TOS level value in the IP packet. For example,
Содержание IES-22812F-2P
Страница 43: ...Syslog Configuration interface 36...
Страница 45: ...SMTP Configuration interface 38...
Страница 52: ...Click Apply to have the configuration take effect SNTP Configuration interface 45...
Страница 54: ...IP Security interface 47...
Страница 61: ...Port Statistics interface 54...
Страница 64: ...TxUnderrun The number of packets dropped because the output FIFO underrun Click Clear to reset the figures 57...
Страница 66: ...Port Control interface 59...
Страница 74: ...State Activity of Switch 2 67...
Страница 87: ...RSTP System Configuration interface 80...
Страница 89: ...RSTP Port Configuration interface 82...
Страница 91: ...SNMP System Configuration interface 84...
Страница 99: ...time Click Apply IGMP Configuration interface 92...
Страница 108: ...Static MAC Addresses interface 101...
Страница 112: ...Multicast Filtering interface 105...
Страница 116: ...6 32 System Reboot Reboot the switch in software reset Click Reboot to reboot the system System Reboot interface 109...
Страница 120: ...10 100 1000Base TX Cable Schematic Straight through cables schematic Cross over cables schematic 113...
