Select a cisco Gigabit Switch from the switch mode and port type

Select a cisco Gigabit Switch from the switch mode and port type. There are many factors to consider. Today we will consider the performance of a cisco Gigabit Switch from the two parts of the switch mode and port type.

Exchange Mode

Currently, cisco Gigabit Switches adopt two main exchange modes: storage forwarding and direct-through forwarding. Storage forwarding requires the cisco Gigabit Switch to decide how to forward after receiving all data packets, it is one of the most widely used technologies in the computer network field. Most cisco Gigabit Switch products now support this technology, such as 3com SuperStack 3 Switch 49002) and the cisco Gigabit Switch mentioned above.

When purchasing a gigabit network card, pay attention to whether the storage forwarding mode is supported to ensure the normal operation of the network. Direct forwarding starts to forward data before the cisco Gigabit Switch receives the entire frame. This reduces the latency and is rarely used at present.

Figure 1

Port type

Currently, most cisco Gigabit Switches are 10/100/100/1000 mbps adaptive ports and 10/100 mbps adaptive ports. The above mentioned Huawei-visida 5280gp is a/mbps adaptive Port product; 3com SuperStack 3 Switch 49003C17700) is a 100/1000 Mbps adaptive Port product.

To sum up, there are four common combinations: a 10/100 Mbps + B 1000 Mbps, a 10/100 Mbps + B 100/1000 Mbps, a 100/1000 Mbps and a Mbps. Note: a and B indicate numbers, for example, four 10/100 Mbps + one 100/1000 Mbps ). The last product is rare and expensive. We recommend that you select the first three cisco Gigabit Switches.

Board bandwidth

The backboard bandwidth is the maximum amount of data that can be transferred between the cisco Gigabit Switch interface processor and the data bus. The value directly affects the performance of the cisco Gigabit Switch. Pay attention to the Board bandwidth when purchasing a cisco Gigabit Switch. The wider the backboard bandwidth, the better. In this way, when the port bandwidth and delay time are the same, the faster the transmission rate of the cisco Gigabit Switch.

Generally, the bandwidth of a cisco Gigabit Switch is larger than 8 Gbps, including 16, 24, 32, and 48. Some high-end core products can be expanded to 720 Gbps, such as Cisco WS-C65093 ). Generally, there is no limit on the number of users. Generally, the larger the bandwidth, the higher the price. for small and medium-sized enterprises, we recommend that you select a bandwidth of about 32 Gbps.

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Network management functions

You can use management software to manage and configure cisco Gigabit Switches through the network management function. For example, you can use a web browser, telnet, snmp, rmon, and other management software. Like common cisco Gigabit Switches, the more network management functions cisco Gigabit Switches support, the higher the price. When purchasing a cisco Gigabit Switch, you can choose based on your needs. For core switches, you need powerful network management functions, or select a dedicated cisco Gigabit Switch, such as smc 8612XL3.

Figure 3