Ethernet switch configuration and supported network types

We all know that the higher the bandwidth of an Ethernet switch, the stronger the data processing capability, but the disadvantage is that the cost will rise, the switch type is rack-mounted, fixed configuration with/without expansion slot) A rack-mounted switch is a slot type switch that provides excellent scalability and supports different network types, such as Ethernet, fast Ethernet, Gigabit Ethernet, ATM, licensing ring, and FDDI, however, the price is relatively high.

A fixed-configuration vswitch with expansion slot is a type of switch with a fixed number of ports and a small number of expansion slots. This type of Ethernet switch can support other types of networks on the basis of a fixed-port network, the price is centered. Fixed configuration Ethernet switches with no expansion slot support only one type of network, but the price is the cheapest.

Configuration:

Rack slots-the maximum number of modules that a rack-mounted switch can insert.

Number of expansion slots-refers to the maximum number of modules that can be inserted by fixed configuration switches with expansion slots.

The maximum number of switches that can be stacked in a stack unit. This parameter specifies the maximum port density available in a stack unit.

The minimum/maximum number of 10 M Ethernet ports is the minimum/maximum number of 10 M Ethernet ports supported by an Ethernet switch.

The minimum/maximum number of M Ethernet ports is the minimum/maximum number of M Ethernet ports supported by a switch.

The minimum/maximum number of M Ethernet ports refers to the minimum/maximum number of M Ethernet ports that a switch can connect.

Supported network types:

Generally, fixed configuration switches with no expansion slot support only one type of network. Rack-mounted switches and fixed configuration switches with expansion slots support more than one type of network, for example, Ethernet, fast Ethernet, Gigabit Ethernet, ATM, licensing ring, and FDDI are supported. The more network types an Ethernet switch supports, the higher the availability and scalability.

Maximum number of ATM ports-ATM is the asynchronous transmission mode. The maximum number of ATM ports is the maximum number of ATM ports supported by an ATM switch or a multi-service multi-function switch.

Maximum number of SONET ports-SONET is the abbreviation of SynchronousOpticalNetwork. It is a high-speed synchronization network specification with a maximum speed of 2.5 Gbps. The maximum number of SONET ports of a vswitch is the maximum number of downstream SONET interfaces of the vswitch.

Maximum number of FDDI ports-the maximum number of FDDI ports supported by an FDDI switch or a multi-service multi-functional Ethernet switch.

Backplane throughput bps)-also known as backplane bandwidth, is the maximum amount of data that can be transferred between the Ethernet switch interface processor, interface card, and data bus. The higher the bandwidth of the backboard of an Ethernet switch, the stronger the ability to process data, but the design cost will also rise.

Buffer size-sometimes called the packet buffer size, is a queue structure that is used by Ethernet switches to coordinate speed matching between different network devices. Burst data can be stored in the buffer until it is processed by a slow device. The buffer size should be moderate. A large buffer space will affect the forwarding speed of data packets in normal communication, because a large buffer space requires a little more addressing time) and increase the device cost. A small buffer space is prone to packet loss errors when congestion occurs. Therefore, adding an advanced buffer scheduling algorithm to an appropriate buffer space is a reasonable way to solve the buffer problem. Pay attention to the following points for the network trunk device:

Whether each port has an independent buffer space, and the working status of the buffer space does not affect the buffering status of other ports; whether the module or port has an independent input buffer and an independent output buffer, or input/output buffering; whether there are a series of buffer management scheduling algorithms, such as RED, WRED, RR/FQ, and WERR/WEFQ.

Max MAC address table size-each port or device connected to the LAN needs a MAC address, which is used by other devices to locate a specific port and update the route table and data structure. The MAC address is 6 bytes long and is allocated by IEEE. It is also called a physical address. The MAC address table size of a device indicates the maximum number of nodes that can be connected to the device.