User manual
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Full duplex of the switch means switch can transmit and receive data at the same time. Half duplex of the
switch means switch can transmit or receive data in a certain time. Generally the speed will choose
auto-negotiation so that the port can automatically judge the connection type of the device connected to it
and automatically adjust the connection type to ensure the maximum compatibility.
Flow Control
Flow control is used to prevent the frames from discard while port is blocked. This method is to send back
the blocking signal to its original address while sending or receiving buffer area start to overflow. It limits
the abnormal flows into a certain range. Flow control can be effective in preventing large amounts of data
in the network instant impact on the network to ensure the efficient and stable user network running.
Two types of flow control:
1. In the half duplex mode, flow control is through back pressure. It is to send a jamming signal to the
transmission source to reduce transmission speed.
2. In the full duplex mode, flow control generally follow IEEE 802.3x standard. Switch sends "pause" to
information source to pause its sending information.
Use flow control to control the data flow between the sending and receiving nodes can prevent packet
loss.
Polarity (MDI/MDIX auto-negotiation)
MDI-II (Medium Dependent Interface- II mode), is a kind of standard built by IEEE for RJ-45 UTP cable of
fast Ethernet 100BASE-T. II stands for parallel configuration. MDI-X (Media Dependent Interface-x mode)
and MDI- II is a kind of standard built by IEEE for RJ-45 UTP cable of fast Ethernet 100BASE-T. X stands
for crossover configuration.
6.3.2 Storm control
When the host system responds to a packet that is constantly circulating on the web or tries to respond to
a system that is not responding, a broadcast storm will occur, and even a network will be blocked or
paralyzed. In order to prevent the network storm, you can set the storm suppression. Storm suppression
is set to allow the entire system to pass the maximum broadcast, multicast or unknown unicast packet
traffic. When each port broadcast, multicast or unknown unicast traffic and achieve the user to set the
value, the system will discard beyond the broadcast, multicast or unknown unicast flow limitation
message, so that overall broadcast, multicast or unknown unicast traffic accounted for the proportion of
reduced to limit the scope of, and ensure the normal operation of the network business.
In the menu bar in order to click on the "main menu", "port configuration", "storm control" into the storm
suppression configuration interface.