D-Link SmartPro DGS-1500-20, Руководство пользователя

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5 Configuration
D-Link Web Smart Switch User Manual
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Hold Time (100-255): This parameter may be set for the time, in seconds the Switch will hold information
sent to it from other switches, utilizing the Discovery Interval . The user may set the hold time from 100 to
255 seconds.
Click Apply for the settings to take effect.
NOTE: The function does not work with
management switch.
QoS > Bandwidth Control
The Bandwidth Control page allows network managers to define the bandwidth settings for a specified port’s
transmitting and receiving data rates.
Figure 5.70 – QoS > Bandwidth Control
From Port / To Port: A consecutive group of ports may be configured starting with the selected port.
Type: This drop-down menu allows you to select between RX (receive), TX (transmit), and Both . This
setting will determine whether the bandwidth ceiling is applied to receiving, transmitting, or both
receiving and transmitting packets.
No Limit: This drop-down menu allows you to specify that the selected port will have no bandwidth limit.
Enabled disables the limit.
Rate (64-1024000): This field allows you to enter the data rate, in Kbits per second, will be the limit for the
selected port. The value is between 64 and 1024000.
Click Apply to set the bandwidth control for the selected ports.
QoS > 802.1p/DSCP
QoS is an implementation of the IEEE 802.1p standard that allows network administrators to reserve
bandwidth for important functions that require a larger bandwidth or that might have a higher priority, such as
VoIP (voice-over Internet Protocol), web browsing applications, file server applications or video conferencing.
Thus with larger bandwidth, less critical traffic is limited, and therefore excessive bandwidth can be saved.
The following figure displays the status of Quality of Service priority levels of each port, higher priority means
the traffic from this port will be first handled by the switch. For packets that are untagged, the switch will
assign the priority depending on your configuration.