Vswitch cluster technology and Connection Methods

Vswitch cluster technology is worth learning. Here we mainly introduce vswitch cluster technology and connection methods. Currently, some vswitches do not provide cascade ports, and some vswitches use cascade ports by default. Therefore, test the function in actual use. If cascade ports are not provided, the common ports of the two switches can be connected through a crossover line to achieve cascade.

Stack

Stack is generally used in medium and large network environments, especially when ports at specific locations have high requirements. The stacking of switches is the most convenient and convenient way to expand ports, and stack can also improve the performance of the switch cluster technology. However, note that during the stacking Process, switch of the same brand must be used ).

Stack is a dedicated connection cable provided by the manufacturer. The "UP" Stack port of one switch is directly connected to the "DOWN" Stack port of another switch. The corresponding port is generally located on the back of the vswitch and is unique and will not cause connection errors.

Summary

As can be seen from the above introduction, cascade implementation is relatively simple, only a common twisted pair or crossover line is required, the cost is small and not limited by distance, while stacking is limited by stacked cables, it can only be connected within a short distance. However, the advantages of stack are also obvious, which can provide more ports in the set and better performance. In actual use, it depends on the specific needs of which connection to use.

In addition to the most important connection method mentioned above, there are two other connection methods at present. One is the cascade of the optical fiber interface, which is easy to implement. The optical fiber jumper is used, connect the optical fiber interface, that is, the "receive" of one end must be connected to the "send" of the other end, and the "send" of the other end must be connected to the "receive" of the other end ".

There is also the switch cluster technology introduced by Cisco. we can regard it as a combination of cascade and stack technologies, vswitch cluster technology can combine vswitches distributed in different geographic ranges logically for unified management. The specific implementation method is to select a Commander in the cluster, while other switches are subordinate and managed by the Commander in a unified manner. It is rarely used in actual use. Just take a look at it.