What is a ring network switch
Ring network switch is a special kind of switch, because the mainstream ring network switch are industrial switch, so it can generally be called industrial ring network switch, ring network switch has many advantages in the ring network structure, such as redundancy, reliability and so on. Ring network switches can form a ring network, each switch has two ports for ring group, between the switches through hand in hand form a ring network topology. The advantage of its establishment is that when a certain link on the ring network is disconnected, it will not affect the forwarding of data on the network, so the ring network switch is introduced in many industrial communication fields. The ring network switch adopts some special technologies to avoid the generation of broadcast storm and realize the reliability of the ring network.
Two: the ring network switch role
In the computer network system, the ring network switch is introduced to meet the weakness of the shared working mode. Hub is the representative of the Shared work mode, if the hub to a postman, so the postman is a "fool" —— to him to deliver, he doesn't know directly according to the address on the letter to the letter to the recipient, will only take the letter to all people, and then let the recipient according to the address information to judge whether their own! The ring switch is a "smart" postman —— ring switch has a high bandwidth back bus and internal exchange matrix. Ring network switches can form a ring network, each switch has two ports for the ring group, between the switches by hand in hand form to form a ring network topology. The advantage of its establishment is that when a certain link on the ring network is disconnected, it will not affect the forwarding of data on the network, so the ring network switch is introduced in many industrial communication fields. The ring network switch adopts some special technologies to avoid the generation of broadcast storm and realize the reliability of the ring network. All the ports of the ring network switch are hung on the back bus. When the control circuit receives the packet, the processing port will find the address control table in memory to determine the NIC (network card) of the destination MAC (hardware address of the network card), and quickly transfer the packet to the destination port through the internal exchange matrix. If the MAC does not exist, the ring network switch broadcasts to all ports. After receiving the port response, the opportunity to "learn" the new address and add it to the internal address table. It can be seen that when the ring network switch receives a "letter" sent by a network card, it will quickly send the letter to the recipient according to the address information above and the "permanent residence book" of the host. If the recipient's address is not on the household register, the ring network switch will distribute the letter to everyone like a hub, and then find the recipient. After finding the recipient, the ring network exchange opportunity will immediately register the person's information to the "household register", so that after the customer service, the letter can be quickly served.
Three: the ring network switch solution
This scheme adopts a three-layer hybrid network topology structure, which is divided into several parts: intersection access, intersection convergence and monitoring center.
1) intersection access: use the 4-port POE ring network switch to connect the intersection camera to the switch, and then transmit to the intersection convergence layer through the light port. The access switch at each intersection is connected to the intersection convergence through the ring network.
2) Crossing convergence: the 8-port PoE ring network switch is connected to the intersection convergence switch, and then transmitted to the monitoring center through the optical port. At the same time, multiple convergence intersections are connected and transmitted to the monitoring center through the ring network.
3) Monitoring center: use 24 gigabit three-layer switches to gather and transfer each intersection to the central switch, and access the central servers and storage devices.
The networking mode of Ethernet switches with ring network function is generally using the connection mode of the tree diagram, trying to avoid making the network a loop.
Four: the advantages of the ring network switch
The ring network switch network is stable and the self-healing time is short.
In the construction of the ring network, when one optical fiber is blocked, using the ring network switch, you can automatically jump to another optical cable to continue communication
Port resources and link bandwidth utilization rates are higher
The network is more reliable after using the ring network scheme with the ring network switch.
Ethernet switch tree network with ring network function avoids the conversion of communication protocol and facilitates management.
The Ethernet switch with ring network function can effectively avoid the broadcast storm and ensure the normal operation of the switch.
Ethernet switch tree network with ring network function has the advantages of high transmission bandwidth, flexible network structure, easy to expand, multi-service support ability, easy maintenance and strong anti-interference.
The Ethernet switch with ring network function can realize redundant protection
Post time: Nov-14-2023