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What are the types of optical switches?

زمان: 2021-11-18 بازدید : 10

We hear a lot about fiber switches and media converter. A fiber Channel switch is a high-speed network transmission replay device, also known as a fiber channel switch of SAN switch. They use fiber optic cables as transmission equipment in contrast to common switches.

Ordinary, the advantages of optical fiber transmission are fast speed and strong anti-interference ability. There are two main types of fiber switches. One is fiber channel switches used to connect storage devices. The other is an Ethernet switch, which uses optical fiber ports. The appearance of the ports is the same as that of ordinary electrical ports, but the types of ports are different.

There are three types of fiber channel switches: Entry-level Fiber Channels switches, work-group fiber channel switches, and core fiber channel switches. So let’s start with the first core-level fiber channel switch.


1. Core-Level Switch.

So-called core-level switches ( also known as guides) are typically located at the center of a large SAN. Connecting several edge switches o form a SAN network with hundreds of ports. A core switch can also be used as standalone of edge switch, but its enhanced functionality and internal architecture make it work better in a core storage environment. Other functions of core switches include support for non-fiber protocols ( such as infiniband), support for 2Gbps Fiber Channel, and advanced optical services ( such as security, replay, and frame filtering). Core-level Fibre Channel switches typically offer many ports, from 64 to 128 or more. It uses very wide internal connections to route data frames with maximum bandwidth. The purpose of using these switches is to build a larger coverage network and provide greater bandwidth. They are designed to route frame signals between multiple ports as quickly as possible with minimal latency.

In addition, core fiber channel switches often use hot-pluggable circuit boards based on blades.

By inserting the switch board into the cabinet. New functions can be added and online maintenance can be performed. Need to expand. Many core level switches do not support quorum loops devices. They only care about the core exchange capabilities.


 Because usability is the most important thing in the overall environment, people are willing to pay more for redundancy.  All components of a high redundancy switch are redundant, eliminating single points of failure and ensuring a very long uptime.  These redundant expenditures are typically used for high availability backplanes, power supplies, redundant circuitry, and software to maintain availability.  This type of switch has a number of built-in logic circuits to handle hardware failures within the switch.  Core switches in fibre Channel switches provide the highest reliability and port density.  In data centers with a lot of fibre channel infrastructure, such products are almost unassailable centralized storage switches.  Therefore, for most highly available networks, a two-channel network built with core FIBRE Channel switches should be chosen.  


2. Work-group FC switch  

Fibre Channel switches can cascade many switches into a large structure.  By connecting one or more ports on two switches, all ports connected to the switch can see a unique image of the network, and any node on the structure can communicate with other nodes.  By cascading switches, you can build a large, virtual, distributed switch that can span vast distances.  A structure consisting of multiple switches looks like a structure consisting of single switches.  Ports on all switches can view and access all other ports on the structure as if they were accessing a local switch.  Unified name servers and administrative services allow you to view and modify all Fabric information through a single interface.  An important factor in creating a distributed architecture is obtaining bandwidth for the connections between switches.  The

effective rate between any two ports is affected by the effective bandwidth of the connection between the switches, and it may be necessary to use multiple connections between the switches to maintain the necessary bandwidth.  Working group Fibre Channel switches are numerous and more versatile.  Workgroup switches have many uses, but the most widely used area is the small SAN.  Such 

switches can be connected together via interconnects between switches to provide additional ports.  Interconnection lines between switches can be created on any port of a Fibre Channel switch.  However, if you plan to use products from multiple vendors, you must ensure that these devices are interoperable.  


3.Entry-Level switch

The application of entry-level switches to fiber channel switches is mainly concentrated in small work-group with 8 to 16ports.