Mining switch requirements
Publish: 2021-05-14 04:07:49
1. The phone card is used to make calls. It's not suitable to do other things
2. I went to see the new building of the central hospital where my classmate gave birth in May. The environment is very good
there are also some advantages in large comprehensive hospitals. For example, if there is massive hemorrhage or other emergencies, the facilities of the central hospital may not be complete.
there are also some advantages in large comprehensive hospitals. For example, if there is massive hemorrhage or other emergencies, the facilities of the central hospital may not be complete.
3. Generally, you can work well without
setting a password
setting a
management
IP address
if you need to
for example,
set a port to trunk
link
/ partition
VLAN
/ port security / dot1x......
setting a password
setting a
management
IP address
if you need to
for example,
set a port to trunk
link
/ partition
VLAN
/ port security / dot1x......
4. It mainly depends on where it is used. It can be used in small Internet cafes and 100 MB switches. For large companies, speed is not the only requirement. Stability is the biggest consideration. It is suggested that Cisco should be considered. The number of users and the demand for network speed should be considered
5. As long as this function is supported, it can be converged (both access layer and core layer switches must support it). In addition, the converged port becomes a new port and does not inherit the original port attribute.
6. ASIC (application
specific
integrated
circuit) is an ASIC< At present, in the field of integrated circuits, ASIC is considered as a kind of integrated circuit designed for special purpose. It refers to the integrated circuits designed and manufactured according to the requirements of specific users and the needs of specific electronic systems. The characteristic of ASIC is to meet the needs of specific users. Compared with general IC, ASIC has the advantages of smaller size, lower power consumption, higher reliability, higher performance, enhanced confidentiality and lower cost
ASIC can be divided into full customization and semi customization. Full custom design requires designers to complete the design of all circuits, so it requires a lot of manpower and material resources, good flexibility, but low development efficiency. If the design is ideal, full custom can run faster than semi custom ASIC. The standard logic unit (Standard
cell) in the library is used for semi customization. When designing, SSI (gate circuit), MSI (such as adder, comparator, etc.), data path (such as ALU, memory, bus, etc.), memory and even system level mole (such as multiplier, microcontroller, etc.) and IP core can be selected from the standard logic unit library. These logic units have been laid out, And the design is more reliable, the designer can complete the system design more conveniently<
modern ASICs often contain the whole 32-bit processor, memory units like ROM, ram, EEPROM, flash and other moles.
such ASICs are often called SOC (system on chip)
FPGA is a close relative of ASIC. Generally, the digital system is modeled by schematic diagram and VHDL. EDA software is used to simulate and synthesize the network table based on some standard libraries, which can be configured to the chip for use. The difference between ASIC and ASIC is that the user does not need to intervene in the layout and routing of the chip, and the logic function can be changed at any time.
specific
integrated
circuit) is an ASIC< At present, in the field of integrated circuits, ASIC is considered as a kind of integrated circuit designed for special purpose. It refers to the integrated circuits designed and manufactured according to the requirements of specific users and the needs of specific electronic systems. The characteristic of ASIC is to meet the needs of specific users. Compared with general IC, ASIC has the advantages of smaller size, lower power consumption, higher reliability, higher performance, enhanced confidentiality and lower cost
ASIC can be divided into full customization and semi customization. Full custom design requires designers to complete the design of all circuits, so it requires a lot of manpower and material resources, good flexibility, but low development efficiency. If the design is ideal, full custom can run faster than semi custom ASIC. The standard logic unit (Standard
cell) in the library is used for semi customization. When designing, SSI (gate circuit), MSI (such as adder, comparator, etc.), data path (such as ALU, memory, bus, etc.), memory and even system level mole (such as multiplier, microcontroller, etc.) and IP core can be selected from the standard logic unit library. These logic units have been laid out, And the design is more reliable, the designer can complete the system design more conveniently<
modern ASICs often contain the whole 32-bit processor, memory units like ROM, ram, EEPROM, flash and other moles.
such ASICs are often called SOC (system on chip)
FPGA is a close relative of ASIC. Generally, the digital system is modeled by schematic diagram and VHDL. EDA software is used to simulate and synthesize the network table based on some standard libraries, which can be configured to the chip for use. The difference between ASIC and ASIC is that the user does not need to intervene in the layout and routing of the chip, and the logic function can be changed at any time.
7.
1、 Requirements:
different brands of switches have a little negative temperature requirements, but the general range is: - 5 ℃ ~ 50 ℃. Storage temperature: - 40 ℃ ~ 70 ℃
Second, the concept of switch:
switch means "switch", which is a kind of network equipment used for electrical (optical) signal forwarding. It can provide exclusive electrical signal path for any two network nodes of access switch. The most common switch is the Ethernet switch. Other common ones are telephone voice switch, optical fiber switch, etc
3. Diagram of switch:
8. Chapter 1 precautions
1.1 safety
please pay special attention to safety when installing or using this proct. The company will not bear any responsibility for any loss caused by violation of safety matters. The output of the light emitting end is invisible laser. During the installation, use and maintenance of this proct, it is strictly forbidden to directly look at the light emitting output port or the optical fiber connector or the end face of the optical fiber connected with it
1.2 maintenance
please use and maintain the proct according to the method described in this manual. If the performance index of the proct does not conform to the instruction or fails, please contact our company in time
1.3 working environment
after comprehensive and strict quality inspection and testing, this proct can ensure normal operation under rated environment
the normal working temperature range of this proct is 0 ℃～ 50 ℃, and it is recommended to operate at about 25 ℃. Humidity less than 95% (non condensing). Low st environment. Please keep the working environment clean and well ventilated. In order to avoid serious impact damage to the switch, please try to avoid collision and vibration ring unpacking and installation
1.4 quality assurance
the proct has been strictly tested before leaving the factory to ensure that its quality meets the technical requirements listed in the manual. The company recommends the user to check and accept the proct
Chapter 2 proct introction
this switch is a 10 / 100base TX adaptive Ethernet desktop 7-port switch with optical fiber interface, supporting VLAN function. One optical fiber mole can be up to 100 MB optical fiber, and SC, st and other multimode or single-mode moles can be selected to realize the data transmission and exchange functions of different kinds of optical fiber
2.1 packing list
open the packing box of the switch, please check the following items:
· a 7 + 1 optical fiber Fast Ethernet switch
· an AC power adapter
· a 220 V power line, an adapter line
· a wall mounted accessory, Two screws
· one user manual
· one certificate
if you find that the above parts in your proct are missing or damaged, please contact your local dealer immediately, and try to keep the original carton and various packaging materials for replacement
2.3 proct features
· comply with IEEE802.3 10Base-T Ethernet and IEEE802.3, 802.3u 100base-tx Fast Ethernet standards
· 7-port 10 / 100M adaptive fast Ethernet RJ-45 port, each port can be used as a cascade port to connect high-level switches or other devices
· 1 Port 100Mbps Fast Ethernet optical fiber port, All kinds of optical fiber moles can be selected
· adaptive full / half plex mode
· store and forward switching system supports rate adaptability and ensures data integrity
· 32K * 32sram frame cache
· port based VLAN
· VLAN port settings are written into built-in EEPROM through program
· 802.1p protocol based on port priority is supported
· 2gbps backplane bandwidth
· maximum rate: 1 48800pps / 100Mbps (per port) 14880pps / 10Mbps (per port)
· LED indicators include: link / act, speed, FD / collection, power
· single chip structure to rece cost and improve reliability
physical characteristics:
protocol:
· IEEE802.3 to Ethernet protocol
· IEEE802.3 μ Fast Ethernet protocol
· ieee802.3x flow control protocol
network cable:
· 100base TX unshielded / shielded type 5 twisted pair
· 10base TX unshielded / shielded type 3 and 5 twisted pair
· 100base FX multimode, up to 2km, Single mode optical fiber up to 100 km (according to user's order)
LED indicator:
· system power indicator
· port indicator: connection / reception, rate, plex / conflict
size:
· 171mm (W) × 23mmH × 127mm (d)
temperature:
· working temperature: 0oC ~ 50oc
· storage temperature: - 20oC ~ 70oC
· ambient humidity: 5% ~ 90%
Power:
· + 4VDC, 1.5A
hardware features:
2.4 front panel description
front panel includes 8 electrical interfaces and one optical interface, Among them, the first port is occupied by optical port
description of top indicator light
Power: power indicator light
link: connection indicator light
Rx: data transmission indicator light
speed: 10M / 100m indicator light
schematic diagram of through line level cross line proction
through line
1 - 1
2 - 2
3 - 3
6 - 6
cross line
1 - 3
2 - 6
3 - 1 R / > 6 - 2
switch pin assignment
pin switch electromechanical port
1 receive data +
2 receive data -
3 send data +
6 send data -
4, 5, 7, 8 undefined
Appendix I
term explanation
address table
this equipment has address table. The address table consists of many items, each of which is used to store the address information of each node in the network, such as MAC address. This information is provided by the learning process of the switch
learning
when the data transmitted from the port is, the switch will record the source address, port number and other relevant information in the address table
store and forward (store and forward)
store and forward is a way of switching. A store and forward switch stores the incoming data in the internal buffer, and performs complete error checking before forwarding, which is most suitable for the network that requires efficiency and stability
the switch detects the destination address of the data frame header and only looks up the path table for the sender port and outgoing data when necessary. This fast forwarding mechanism will make the server directly connect to the network, thus recing the transmission load. Switches usually can greatly improve the network transmission rate
3.3 optical interface connection
use single-mode or multi-mode optical fiber connector to connect with the optical interface on the switch (SC / St head is optional)<
3.4 description of indicator light ring use
after power on, the switch will conct self-test, and the indicator light will be on after the end.
color status description of LED indicator light
power green light indicates that the power supply is normal
off. Please check whether the power supply is connected properly, and whether the switch has been started.
link / act green light / flash when the external equipment is connected, When the indicator light is on, it means that the connection is normal, and when it flashes, it means that the data is being received.
when it is off, it means that there is no device connected to the interface or the device is not connected correctly.
FD / collection is on / flashing in green, it means that the data transmission is in progress and other activities are requested to wait, When it is on, it means full plex operation
when it is off, half plex operation
when it is green, it means that the current working state is 100Mbps
when it is off, it means that the current working state is 10Mbps
Appendix II
troubleshooting
the connection indicator is not on
solution:
1. Make sure that the cable connection is correct
2. Make sure that the port connection is correct
between several workstations Unable to communicate
solution:
the address table may contain older address information. Please turn off the power supply of the device and refresh the address information from the new power on
Chapter 3 hardware installation
· place the switch on a smooth and flat place or hang it on a fixed bracket
· connect the power output line to the DC power port of the switch
· connect the twisted pair 3,4,5 UTP line to one port of the switch (note, Note: the first port is not available
· as above, connect other computers or hub to other ports of the switch
· connect to the optical port of the switch with optical fiber jumper
· wait for 20 seconds, the switch can carry out data transmission
1.1 safety
please pay special attention to safety when installing or using this proct. The company will not bear any responsibility for any loss caused by violation of safety matters. The output of the light emitting end is invisible laser. During the installation, use and maintenance of this proct, it is strictly forbidden to directly look at the light emitting output port or the optical fiber connector or the end face of the optical fiber connected with it
1.2 maintenance
please use and maintain the proct according to the method described in this manual. If the performance index of the proct does not conform to the instruction or fails, please contact our company in time
1.3 working environment
after comprehensive and strict quality inspection and testing, this proct can ensure normal operation under rated environment
the normal working temperature range of this proct is 0 ℃～ 50 ℃, and it is recommended to operate at about 25 ℃. Humidity less than 95% (non condensing). Low st environment. Please keep the working environment clean and well ventilated. In order to avoid serious impact damage to the switch, please try to avoid collision and vibration ring unpacking and installation
1.4 quality assurance
the proct has been strictly tested before leaving the factory to ensure that its quality meets the technical requirements listed in the manual. The company recommends the user to check and accept the proct
Chapter 2 proct introction
this switch is a 10 / 100base TX adaptive Ethernet desktop 7-port switch with optical fiber interface, supporting VLAN function. One optical fiber mole can be up to 100 MB optical fiber, and SC, st and other multimode or single-mode moles can be selected to realize the data transmission and exchange functions of different kinds of optical fiber
2.1 packing list
open the packing box of the switch, please check the following items:
· a 7 + 1 optical fiber Fast Ethernet switch
· an AC power adapter
· a 220 V power line, an adapter line
· a wall mounted accessory, Two screws
· one user manual
· one certificate
if you find that the above parts in your proct are missing or damaged, please contact your local dealer immediately, and try to keep the original carton and various packaging materials for replacement
2.3 proct features
· comply with IEEE802.3 10Base-T Ethernet and IEEE802.3, 802.3u 100base-tx Fast Ethernet standards
· 7-port 10 / 100M adaptive fast Ethernet RJ-45 port, each port can be used as a cascade port to connect high-level switches or other devices
· 1 Port 100Mbps Fast Ethernet optical fiber port, All kinds of optical fiber moles can be selected
· adaptive full / half plex mode
· store and forward switching system supports rate adaptability and ensures data integrity
· 32K * 32sram frame cache
· port based VLAN
· VLAN port settings are written into built-in EEPROM through program
· 802.1p protocol based on port priority is supported
· 2gbps backplane bandwidth
· maximum rate: 1 48800pps / 100Mbps (per port) 14880pps / 10Mbps (per port)
· LED indicators include: link / act, speed, FD / collection, power
· single chip structure to rece cost and improve reliability
physical characteristics:
protocol:
· IEEE802.3 to Ethernet protocol
· IEEE802.3 μ Fast Ethernet protocol
· ieee802.3x flow control protocol
network cable:
· 100base TX unshielded / shielded type 5 twisted pair
· 10base TX unshielded / shielded type 3 and 5 twisted pair
· 100base FX multimode, up to 2km, Single mode optical fiber up to 100 km (according to user's order)
LED indicator:
· system power indicator
· port indicator: connection / reception, rate, plex / conflict
size:
· 171mm (W) × 23mmH × 127mm (d)
temperature:
· working temperature: 0oC ~ 50oc
· storage temperature: - 20oC ~ 70oC
· ambient humidity: 5% ~ 90%
Power:
· + 4VDC, 1.5A
hardware features:
2.4 front panel description
front panel includes 8 electrical interfaces and one optical interface, Among them, the first port is occupied by optical port
description of top indicator light
Power: power indicator light
link: connection indicator light
Rx: data transmission indicator light
speed: 10M / 100m indicator light
schematic diagram of through line level cross line proction
through line
1 - 1
2 - 2
3 - 3
6 - 6
cross line
1 - 3
2 - 6
3 - 1 R / > 6 - 2
switch pin assignment
pin switch electromechanical port
1 receive data +
2 receive data -
3 send data +
6 send data -
4, 5, 7, 8 undefined
Appendix I
term explanation
address table
this equipment has address table. The address table consists of many items, each of which is used to store the address information of each node in the network, such as MAC address. This information is provided by the learning process of the switch
learning
when the data transmitted from the port is, the switch will record the source address, port number and other relevant information in the address table
store and forward (store and forward)
store and forward is a way of switching. A store and forward switch stores the incoming data in the internal buffer, and performs complete error checking before forwarding, which is most suitable for the network that requires efficiency and stability
the switch detects the destination address of the data frame header and only looks up the path table for the sender port and outgoing data when necessary. This fast forwarding mechanism will make the server directly connect to the network, thus recing the transmission load. Switches usually can greatly improve the network transmission rate
3.3 optical interface connection
use single-mode or multi-mode optical fiber connector to connect with the optical interface on the switch (SC / St head is optional)<
3.4 description of indicator light ring use
after power on, the switch will conct self-test, and the indicator light will be on after the end.
color status description of LED indicator light
power green light indicates that the power supply is normal
off. Please check whether the power supply is connected properly, and whether the switch has been started.
link / act green light / flash when the external equipment is connected, When the indicator light is on, it means that the connection is normal, and when it flashes, it means that the data is being received.
when it is off, it means that there is no device connected to the interface or the device is not connected correctly.
FD / collection is on / flashing in green, it means that the data transmission is in progress and other activities are requested to wait, When it is on, it means full plex operation
when it is off, half plex operation
when it is green, it means that the current working state is 100Mbps
when it is off, it means that the current working state is 10Mbps
Appendix II
troubleshooting
the connection indicator is not on
solution:
1. Make sure that the cable connection is correct
2. Make sure that the port connection is correct
between several workstations Unable to communicate
solution:
the address table may contain older address information. Please turn off the power supply of the device and refresh the address information from the new power on
Chapter 3 hardware installation
· place the switch on a smooth and flat place or hang it on a fixed bracket
· connect the power output line to the DC power port of the switch
· connect the twisted pair 3,4,5 UTP line to one port of the switch (note, Note: the first port is not available
· as above, connect other computers or hub to other ports of the switch
· connect to the optical port of the switch with optical fiber jumper
· wait for 20 seconds, the switch can carry out data transmission
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