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4.2 TFTP client function
The using type and working mode of port has a direct relationship with configuration, here introduced the
type and support property of port.
The type of port and working mode
The type of port in different working mode is different, the specific port stated below
10/100/1000M adaptive RJ45 port
If ports work in electric mode, these ports support 6 kinds of working mode
1）10Mbps-Half duplex
3）100Mbps-Half duplex
5）1000Mbps-Full duplex
The switch provides Settings function of the port negotiation, make the device segment exchange
information about their respective functions in a link, which can achieve the best operating mode on the
link to realize automatic adjustment of transport (full duplex or half duplex) and the transmission speed
function (10 Mbps, 100 Mbps or 1000 Mbps).Port for optimizing processing.
A. 1000BASE-TX port support mandatory ability：
1） Mandatory-100M/FD
2） Mandatory-1000M/FD
flow control
Full-duplex mode with flow control in accordance with the IEEE 802.3 x based on PAUSE function
Equipment resources shortage in the network, will lead to the equipment has no ability to continue to
receive data, device can transmit outward PAUSE frame at this time, the equipment which received the
frame will stop for a period of time to send operation according to PAUSE frame data, the inactive time is
measured in Quanta, the length is associated with physical link a Quanta in physical link above 512 bits of
data transmission time.
Half duplex mode with the Back - pressure flow control function.
When two devices to send data on the Internet at the same time, can produce conflict, in the event of
conflict, the sending site will detect the conflict, they will automatically stop a random time interval, and resend
again, but it will reduce the efficiency of the network. So the network devices will intercept on the network to
determine whether the network is available, when lack of equipment resources will start the flow control,
sending a set of carrier signal pulse sequence (false conflict signal), equipment detected on the network carrier
signal and will think the network due to being used by other equipment conflict, other sites under half duplex on
the network will stop sending data.
4.3 VLAN（Virtual Local Area Network）
When the switch handle multiple network management tasks at the same time, set up the virtual local area
network, can reduce resource consumption, improve the efficiency of the network. Virtual local area network is
composed of multiple devices of flexible equipment group, the equipment can be located in anywhere in the
2）10Mbps-Full duplex
4）100Mbps-Full duplex
6）Port auto negotiation
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