What is a Ring Switch? How do I find out if a switch has loops????????

For example, a company has 4 customers to form a ring network, using optical cables to form a ring network of these four customers, customer 1--- customer 2--- customer 3--- customer 4--- customer 1, set to automatic conversion, when customer 1 --- customer 2 The optical fiber cable of this line is not connected, the ring network switch will automatically jump to customer 3 to supply the network to customer 2, so as to ensure that customer 2 can continue to access the Internet.

Ring network switch is a special kind of switch, because the mainstream ring network switch is an industrial switch, so it can generally be called an industrial-grade ring network switch, ring network exchange has many advantages in the ring network structure, such as redundancy, reliability, etc.

Ring network switches can form a ring network, each switch has two ports for ring assembly, and the switches form a ring network topology through hand in hand.

The advantage of its formation is that when a link on the ring network is disconnected, it will not affect the data on the network, so the ring network switch has been introduced in many industrial communication fields. The ring network switch uses certain special technologies to avoid the generation of broadcast storms, and at the same time realize the reliability of the ring network.

Extended Information: Principles of Network Switches:

1. The switch establishes a mapping between the source MAC address in the received data frame and the AC port, and writes it to the MAC address table.

2. The switch compares the destination MAC address in the data frame with the established MAC address table to determine which port to perform.

3. If the destination MAC address in the data frame is not in the MAC address table, send the destination to all ports**. This process is called flooding.

4. Broadcast frames and multicast frames to all ports**.

What are the switch ring network protocols, and I didn't find the relevant reference.

Ring network protocols: spanning tree protocol, fast ring protection protocol, elastic packet ring, etc.

Ordinary Ethernet switches cannot be used as a ring network, so once a ring is formed, a broadcast storm will be formed.

However, the ring network structure has its own advantages, such as redundancy, reliability and other advantages. A link on the ring network is disconnected and merges quickly, which will not affect the data on the network. Therefore, in many industrial communication fields, ring switches have been introduced.

This ring switch can form a ring network. There are two ports on each switch for ring assembly, and the switches form a ring network topology through hand-in-hand.

The ring network switch adopts some special technologies to avoid the generation of broadcast storms, and at the same time realizes the reliability of the ring network. The mainstream ring network switches are industrial switches, such as Hirschmann of DS and Moxa in Taiwan, all of which have industrial switches that support ring networks.

If it is a manageable switch, it can be detected by using the STP protocol.

If it is a fool switch, you can only look at the status of the indicator light, and the general indicator light is always on, basically no flickering or flashing and extinguishing at the same time, and there is basically a loop.

This lucky way is.

tracert destination IP

There will be an endless loop, jumping between two IPs all the time.

For the rest, look at the port traffic, etc.

The ring network is actually link redundant.

Industrial-grade redundant wheel rubber ring mesh can be quickly switched, such as A---B---C---A, a small ring A as the core.

If the normal data transmission direction is B---AC---A, the link between BAs is disconnected, and communication cannot be achieved.

b. Fast switching through the ring network protocol (less than 100 milliseconds between the wax ants when switching the advanced ring network protocol basically does not affect the use).

Realize data transmission communication between b---c---a.

The principle of ring formation is that there should be a core point in the ring, and all device data is sent to this node, and the advantage of the ring network is that the line in the ring can be broken at any point without affecting the business. Especially in industrial environments, where fiber optic cables are used.

There are only advantages in things.