Nowadays, people's daily life has been inseparable from the network. With the rapid development of network technology, migration from 10GbE to 40GbE has become a hotspot. For data centers which are in the process of such migration, connecting 40GbE equipment with existing 10GbE equipment is what must be experienced. In addition, carrying out the migration smoothly is the greatest concern of many data center managers. In order to solve this problem, this article is going to introduce two...