文档介绍：生成树学****Spanning tree learning)
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1, enterprises are ing more and more dependent on the . The is the life of panies. Network outages can cause disastrous losses on business, revenue, and customer trust.
work link, failure of a critical port on a device or switch can work disruption. Therefore, redundant functions must be taken into consideration when designing work so as to maintain work availability and eliminate any single point of failure. Redundancy devices can be implemented by installing standby devices work links in critical areas. Sometimes it's very expensive to set redundant functions to all links and devices in work. Network engineers often need to balance the cost of redundancy functions and the requirements work availability.
2, redundancy means two different paths to reach the destination. For example, in real life, there are two roads to a city. There are two bridges to cross the river, or two doors to go out of the room. When one of these paths is blocked, one can choose another. The way to provide redundancy is to connect the switch to multiple links. Redundant links in an work can reduce congestion and provide high availability and load balancing. However, linking switches together can also cause problems. For example, the broadcast characteristics of traffic result in switched loops. Broadcast frames are sent continuously in all directions, leading to br