Network redundancy is not used in our current project, but the equipment of some projects can achieve simple network redundancy. The simple method of network redundancy is to use the built-in STP (Spanning Tree Protocol) and RSTP (Rapid Generation) of the switch. Tree protocol), on a switch with STP function, when a network loop occurs, some of the ports will be automatically blocked to make the network free of loops. When the line or port is not working properly during use, he will open the corresponding blocked port to enable The network is smooth (it takes about 30 seconds to converge), and RSTP converges faster.
If you have a dual-core project, then there must be VLAN division. Then MSTP plus VRRP can be used to generate STP based on VLANs. The core can also achieve the effects of double-click hot standby and load sharing. The lower end convergence speed is RSTP, and if the core fails, the automatic switchover time is 10 seconds.
If it is a very rich customer, stacking and link aggregation can be used to achieve network redundancy in the project. For example, the stacking technology of Huasan is IRF (Elastic Intelligent Architecture), which is a software virtualization technology. After multiple devices are linked together through IRF physical ports, necessary configurations are performed, and then virtualized into a “distributed deviceâ€. In the same way, link aggregation virtualizes multiple lines into one line, so no matter which device is in use, that line will not work and will not affect the normal operation of the network.
The two-dimensional motion mixer, refers to a mixer in which the rotating drum can move in two directions at the same time. The two movement directions are the rotation of the rotating drum, and the rotating drum swings with the swing frame. The material to be mixed in the drum rotates, flips, and mixes with the drum, and at the same time, the mixing movement occurs left and right back and forth with the swing of the drum. Under the combined action of these two movements, the material can be fully obtained in a short time. Blended.
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