With the development of technology, network switch grows not only in speed like the migration from gigabit Ethernet switch, to 10gb switch, 40gb switch and 100gb switch, but also in complexity to acquire more functions and meet complicated conditions. Layer 3 switch is equipped with advanced functions and is sometimes compared with a router by people. What are layer 3 switch and router? Can a layer 3 switch act as a router? This post will focus on this problem.
What Is Layer 3 Switch and How It Works?
The data switch is a layer 2 switching device that dynamically transmits packets according to the physical addresses (MAC addresses) of connected devices. Layer 3 switch, on the basis of the data switch, boasts additional routing decisions by inspecting the IP addresses. Layer 3 switches are thus able to segregate ports into separate virtual LANs (VLANs) and perform the routing between them. Additionally, this switch helps reduce the amount of broadcast traffic, simplify security management, and improve fault isolation.
What Is Router and How It Works?
A router works at layer 3 of the OSI Model (Network). It is a device usually located at gateways where networks meet, to connect various local networks and wide networks. It decides where to send packets by utilizing an IP Routing table. When an IP packet comes in, the router looks up the destination IP in the IP Routing table. If that destination IP is not found in the table, the router will drop the packet. The router can perform NAT to translate the private IP address to public address, which can get you into the Internet. So it is a common network device in household use.
Can a Layer 3 Switch be Used as a Router?
As a layer 3 switch possesses the routing function of a router, can we replace a router with it? Let’ s have a detailed view of their similarities and disparities.
Layer 3 Switch Vs Router: Similarity
Both layer 3 switch and router work at layer 3 of the network. Layer 3 switches technically have a lot in common with traditional routers. Both of them can support the same routing protocols, inspect incoming packets and make dynamic routing decisions based on the source and destination addresses inside. The switches can also be configured to support routing protocols such as RIP, OSPF, and EIGRP.
Layer 3 Switch Vs Router: Disparity
Internally, the hardware inside a layer 3 switch blends that of traditional switches and routers. As for packet forwarding, router transmits packet by a microprocessor-based software routing engine, while the switch performs switching through hardware. After routing the first data flow, the layer 3 switch will generate a mapping table of MAC addresses and IP addresses, so that the same data flow will directly pass through the layer 2 according to this table, thus eliminating network delay and improving the efficiency of packet forwarding. Externally, layer 3 switches do not offer the WAN-type ports as standard routers do, so they lack WAN functionality.
Router requires configurations before deployment due to the inbuilt operating system. On the contrary, the layer 3 switch is usually ready to go when acquired, and configurations are optional as you like.
From a software perspective, layer 3 switches are not capable of the extra services that routers typically provide, such as NAT and NetFlow.
Conclusion
All in all, it is not recommended to replace a router with layer 3 switch, but you can apply them in the same network at the same time. In addition, whether a layer 3 switch can supplant a router relies upon the switch model and what you expect from it. Some layer 3 switches are almost router substitutions, with a full scope of WAN, firewall, VoIP, and so on. However, those switches are costly, and most layer 3 switches just have Ethernet ports. In this way, a dedicated router is cost-effective than a layer 3 switch.
Why should fiber optic cable not be tightly bent? Are fiber optic cable fragile? These issues are what users care about when deploying fiber patch cables. Usually, fiber optic cable is made from two bend sensitive materials: plastic or glass. It is broken easily when kinked or bent too tightly to exceed the minimum bend radius of cable. Then which factor will influence bend radius? How to choose cables according to it? This blog will provide some hints.
Why Bend Radius Is Important?
When you deploy the fiber optic cable, it is inevitable to flex, pull and bend it due to the practical conditions. However, it is the bend radius that determines how much you can bend a cable. It represents as the safe value that can prevent your cable from damaging or degrading its performance. If a cable is bent beyond its allowed radius, it will generate crosstalk or interference in data transmission, or even shorten its life. That’s why it’s important to know the bend radius of the cables, especially the minimum bend radius,which is the smallest allowed radius the cable can be bent around without signal loss or impairment.
Factors Impact Bend Radius of Cable
The bend radius may differ from cables. The fact is the smaller the minimum bend radius, the more flexible the cable. Here list some factors that may affect this radius of cable.
Outer Jacket Thickness
The thickness of the outer jacket of a fiber patch cable intended for bending will influence the potential minimum curve radius. Generally speaking, if the outer jacket is thick, the fiber patch cable will have a smaller bend radius. This can be translated by the fact that when the cable is bent, the stretching force makes the outer jacket thinner and even broken. Therefore, if the outer jacket is thin itself, the external tension may deform of break the fragile cable.
Material Ductility
Cables are manufactured by different materials, and this will affect the radius of the bend. Ductility refers to the flexibility of material under tensile stress or stretching force. If you would like to obtain small curve radius, you should choose cables made of highly ductile materials like copper. An alternative such as glass is more brittle than flexible.
Core Diameter
The large core diameter determines the small bend radius. Simply put, the single mode fiber has a smaller diameter than multimode fiber, and the single mode fiber cable bears less weight or bending than multimode fiber cable. That’s why the bending radius of single mode fiber optic cable is larger than the multimode fiber optic cable.
How to Choose Fiber Optic Cables based on Bend Radius?
Generally, the multimode fiber optic cable is recommended if the bend radius is the only consideration. And another option is BIF fiber cable. BIF means the bend insensitive fiber which enables tight curve radius when cables are bent or twisted. FS adopts it in producing both multimode and single mode fiber cables to endow them much smaller bend radii than ever before. It realizes more convenience in cable management, as well as less signal loss and less cable damaging. Here is a bend radius chart of BIF fiber optic cable.
Fiber Cable Type
Minimum Bend Radius
OM3/OM4 MTP BIF
7.5mm
Single Mode OS2 MTP BIF
10mm
Uniboot OS2 LC BIF
10mm
Uniboot OM3/OM4 LC BIF
7.5mm
Conclusion
To sum up, the bend radius of cables is paramount for fiber patch cable installations. Factors which influence the minimum radius of fiber optic cable include the outer jacket thickness, material ductility and core diameter. To protect the integrity and performance of cable, we shall not bend the cable beyond its allowed radius.
Optical transceivers usually work coordinately on a pair of network switches. As switch is responsible for directing the flow of data, optical transceiver works for transforming light to data or the opposite. Then how do two transceiver modules work with each other? Can I connect two optical transceivers of different brands, fiber types or wavelengths? You can find answers here.
How Do Two Optical Transceiver Talk to Each Other?
It is known to all that the fiber optic transceiver contains a transmitter and a receiver in the same component. These are arranged in parallel so that they can operate independently from each other. When working on two switches in the same network, the transmitter on one optical transceiver takes an electrical input and converts it to an optical output from a laser diode or LED. The light from the transmitter is coupled into the fiber with a connector and is transmitted through the fiber optic cable plant. The light from the end of the fiber is coupled to a receiver on the other transceiver where a detector converts the light into an electrical signal which is then conditioned properly for use by the receiving equipment.
Fig1. How optical transceiver works
Can I Connect Two Optical Transceivers of Different Brands, Fibers or Wavelengths?
When people are under-budgeted or in urgent need of original optical transceivers that are out of stock, they may turn to other or third-party transceivers. But how to make different transceivers work coordinately without link failure? Is it possible to connect two optical transceivers of different brands, fibers or wavelengths?
Optical Transceiver of Different Brands
As is known to all, fiber optic transceivers are manufactured with a lot of standards and protocols. If the SFP types are of the same protocol at each end, for example: both sides with SX, LX or whatever is currently in use, you can build the link between them. Please note that only the identical protocol is far more enough.
If the network switch comes from different vendors and optical transceivers with different protocols, you will get a dead link between network switch and the transceiver, thus the whole network fails. Make sure the transceiver and the switch at both ends are compatible with each other. However, as the transceiver compatibility is introduced to the optic field, many optical transceivers are now produced to be compatible with other brands. FS almost has no transceiver compatibility issues with other brand switches as all the optical transceivers have been tested to ensure its compatibility before shipping.
Optical Transceiver with Different Fiber Types
Common sense says a multimode sfp cannot work well with a single mode sfp, as the single mode fiber features a narrow core, allowing only a single mode of light to propagate while the multimode fiber has a wider core enabling multiple modes of light to propagate.
Well, as the network evolves, it is unavoidable to use single mode devices on the existing multimode fiber cables, which forces the birth of the mode conditioning cable used for single mode to multimode conversion. It is generally a duplex multimode cable that has a small length of single mode fiber at the start of the transmission length. As for optical transceiver with single mode fiber, connect the single mode connector of the cable into the transmit bore of the transceiver, and multimode connectors of the cable into the receive bore of the transceiver with all other connections going as normal.
Fig.2 Optical transceiver works with mode conditioning cable
Optical Transceiver on Different Wavelengths
A given transceiver generally supports a specific wavelength for both transmitting and receiving. It is vital the wavelength of the fiber optic transceivers (850nm, 1310nm, 1550nm) matches on each end, as a 1310nm sfp transceiver will not talk to a 850nm sfp transceiver. Data transmission implies that data is sent from one end to the other. The SFP transceiver on one end converts electrical signals into optical signals. A built-in laser transmits light through the fiber to the other side. Here, an optical diode converts the lightback into an electrical signal. To guarantee that the SFP at the other end is capable of doing this, the SFPs at both ends should support the same wavelength.
Conclusion
To make sure your optical transceivers work smoothly with each other, be careful about their protocols, wavelengths and fiber types in case of link failure. FS provides a great range of fiber optic transceivers with no transceiver compatibility problem and transceiver prices are very competitive.
NAT, which is critical to the IPv4 networks we still use today, has been hotly debated as the IPv6 grows with more addresses. However, since the IPv6 is not full-fledged, the existence of NAT still makes sense. Here I will introduce NAT definition and figure how NAT works and why we need it.
What Is NAT?
NAT, known as network address translation, is the method adopted by a firewall or router to assign the public addresses to the devices work in the a private network.
It translates the private IPv4 addresses we use in our internal networks into public IPv4 addresses that can be routed over the internet. As we all know, the private addresses may be occupied by connected local service—computers, game consoles, phones, fiber switches etc. to communicate with the modem/router and other devices on the same network. However, the home network connection uses a single public IP address to access the internet. Given this, NAT is responsible for translating the IP address of every device connected to a router into a public IP address at the gateway. Then those devices can connect to the internet.
NAT: Why We Need?
Assume that you have 3 PCs, a gigabit Ethernet switch which connects 6 PCs, a 10 gigabit switch connecting 6PCs and one smart phone, two ipads and all of them need to work at the same time, then you need to get each of them an IP address accessible to the Internet. But due to a lack of IPv4 IP address space, it is hard to handle the massive number of devices we use every day. Well, the network address translation, proposed in 1994, has become a popular and necessary tool in the face of IPv4 address exhaustion by representing all internal devices as a whole with a same public address available. Together with its extension named port address translation, the network address translation can conserve IP addresses.
Safety, another issue we may concern when accessing the external internet, can partly be addressed by network address translation which servers as a strict controller of accessing to resources on both sides on the firewall. The hackers from outside cannot directly attack the internal network while the internal information cannot access the outside world casually.
How Does NAT Work
A router carrying NAT consists of pairs of local IP addresses and globally unique addresses, by translating the local IP addresses to global address for outgoing traffic and vice versa for incoming traffic. All these are done by rewriting the headers of data packets so that they have the correct IP address to reach the proper destination.
There are generally two types of NAT: dynamic and static.
In dynamic NAT, we map inside local addresses in internal network to global addresses so that they can access resources on the internet. The router responds to the hosts who want to access the internet with an available public IPv4 address so that they can access the internet.
In static NAT, we usually map an internal local address to a global address so that hosts on public networks can access a device in the internal network.
Conclusion
In a word, before the full transition of IPv6, NAT can guarantee the smooth internet surfing no matter how many devices you’ve got. Knowing what it is and how it works with network address will help you establish a clear understanding of it so that you can make good use if it.
As the network grows, the network equipment producers flourish, bringing many different exclusive products into the market. How to manage or operate so many equipment as the different vendors own diversified CLI and web interface to debug and configure. It’s time to put forward some new technologies, SDN vs. OpenFlow vs. OpenStack to tackle this problem.
SDN VS OpenFlow vs. OpenStack: What Are They?
SDN-Software Defined Network
Software-defined networking (SDN) technology is a new way to cloud computing.To improve network monitoring and performance, SDN is designed to enhance network management and promote programmatically network configuration efficiently. It centralizes network intelligence in one network component by decoupling the forwarding process of network packets (data plane) and the routing process (control plane). SDN is mainly composed by application layer which provides application and service, control layer responsible for unified management and control, and forwarding layer that offers hardware equipment like fiber switches, Gigabit Ethernet switches and routers to forward data. The following table illustrates the advantage of SDN against traditional network.
Software-defined Network vs. Traditional Network
Software-defined Network
Traditional Network
Forwarding and control separation
Forwarding and control coupling
Centralized control
Decentralized control
Programmable
Non-programmable
Open interface
Closed interface
OpenFlow: the Enabler of SDN
To turn the concept of SND into practical implementation, we need to put into place some protocols, among which OpenFlow is the most desirable one. So what is OpenFlow?
OpenFlow is a communications protocol that empowers a network switch or router to access the forwarding plane over the network. Also it can serve as a specification of the logical structure of the network switch functions. We know that each switch vendors may have their own proprietary interfaces and scripting languages, and this protocol enables them to work coordinately while avoid exposing their technology secret inside switches to the public.
OpenStack
OpenStack is an open source cloud computing management platform project that combines several major components to accomplish specific tasks. Its existence confronts the AWS of Amazon, as it allows all participators to access the source code and share some ideas, if they want to. It is convenient and reliable with strong compatibility and adaptability, gaining support from many vendors.
SDN vs. OpenFlow vs. OpenStack: What’s the Difference?
SDN vs. OpenFlow
SDN and OpenFlow are prone to be confused and misunderstood. Take a look at SDN vs. OpenFlow, the two are indeed interconnected. First of all, as an open protocol, OpenFlow underpins the various SDN controller solutions. The complete SDN solution is taking SDN controller as the core, backed by OpenFlow switches and NFV to offer bountiful SDN app for a new smart, dynamic, open, custom network.
OpenFlow vs. OpenStack
OpenFlow, since its release, has gained achievements in hardware and software support. CISCO, Juniper, Toroki and pronto have all launched network equipment like 10gbe switch, router, and wireless access point which support OpenFlow. In contrast, OpenStack covers many aspects like network, virtualization, operation system, and server. It is an ongoing cloud computing platform.
SDN vs. OpenStack
Network orchestration OpenStack copes with the component organization of a particular group of assets, from open source or closed implementations, thus we can say that it can be considered how a software-defined network is deployed. While SDN control serves like the commander of organizers and deals with maintaining consistent (as far as is feasible) policy across multiple groups of assets, so we deem it much like the "why."
Conclusion
SDN vs. OpenFlow vs. OpenStack, the three terms that are of far-reaching significance, attract more attention from the public. This article may provide you with some help to know them at the very first step. Till now, the networking technologies are still advancing, knowing what they are at present doesn’t mean the truly master of it. There is still plenty of room left to be explored.
We know that if any chain in the network fails, the operation may break down. Facing this problem, we’ve introduced the stackable switches and together with it is the concept of redundant links. When stacking switches, except the shortest link between switch and the main frame computer, we also prepare other links in case of the break down of the major link. The other links are redundant links between switches.
Introduction of Redundant Link
In order to maintain the stability of the network, composed of multiple switches, some backup connections are usually used to improve the robustness and stability of the network. The backup connection here is also called a backup link or a redundant link. Redundant links in a switches are accomplished through the use of multiple switches or multiple links between switches.
In an enterprise network, a link is redundant if its presence or absence does not affect the nature of the mechanism. That is, even if we remove that link, the mechanism will behave in the same manner.
Pros and Cons of Redundant Link
Pros
The redundancy in networks can improve its reliability. Our intention is that if one device fails, another can automatically take over. By adding a little bit of complexity, we try to reduce the probability that a failure in switch will take the whole network down. Spanning Tree Protocol,the redundancy protocols, can be implemented on any topology or mesh. The Cellular Redundancy provides alternative to running a physical line for redundancy. In addition, with Parallel Redundancy Protocol, we can achieve zero packet loss, “0ms” recovery. And it can be added to any existing network.
Cons
But you cannot have both complexity and reliability at the same time. The more complex something is, the harder it is to maintain, the greater the chance of human error, and the greater the chance of a software bug causing a new failure mode.
The switches between the backup links are often connected to each other to form a loop. The loops can be redundant to a certain extent. The redundant backup of the links can bring robustness, stability and reliability to the network. However, the backup link also causes loops in the network. The loop problem is the most serious problem faced by the backup link. The loop between the switches will cause new network problems: broadcast storm, loops and duplicate frames.
Tips
To make fully use of redundant links, we can minimize the complexity. Select two identical switches as the core switches. If you need gigabit Ethernet switch, for example, you can select two 10 gbe switches that run the same software and have the same connections. We can also introduce the Spanning Tree Protocol (STP) which was developed as a Layer 2 loop-avoidance mechanism for redundant links in a switched network. With STP, there will be only one logical path between all destinations on the network and redundant links that could cause a loop are intentionally blocked.
Conclusion
Redundant links are useful to a great extent. That’s why so many people now choose stackable switches rather than standalone ones to maintain the efficient network operation. Stackable switches are now our star products and focal point. We would like to introduce our high quality fiber switch to every people in need of reliable network performance.
There are many different types of server racks on the market, like open frame rack, server cabinet, and rack mount and wall mount enclosures. Open frame rack, thanks to its reasonable price, and material saving, has attracted more and more customers. It is more convenient to ship and be packed. To help you better understand the open frame rack, this article will introduce it in three aspects.
Brief Introduction of Open Frame Rack
The open frame rack is an equipment to mount your servers and other network equipment. When you deploy equipment and organize cables in a computer room or data center,it is important to make proper and reasonable space utilization. Therefore, open frame server racks come at a right time to help stay organized in a cost-effective manner. Here I list four benefits of open frame server racks and why you should consider them for you equipment storage needs.
Benefits of Open Frame Rack
Better Cable Management
The fact that you may run the cables with obstacles from doors and panels won’t frustrate you when using an open frame rack. It is just formed by 2-post racks or 4-post racks with no limitations to each orientation. With this rack, you will not consider whether it can contain all your applications within the space any more.
Airflow
The enclosed racks are not easy for ventilation. Open frame server racks, on the other hand, allow for unrestricted airflow, preventing heat build-up. The proper cooling is conducive to the running of the whole system.
Easy Access
Without barriers, you can access to every equipment and route cables freely in every direction you want. And all the organs and working status are visible to you for real-time monitoring.
Cost
Open frame server racks are a cost-effective way to manage equipment, compared to enclosed racks. For example, the 45U 4 post open frame server rack sells at $300 and 2 post one $210, much cheaper than the 45U server cabinet selling at $650. The cost of producing and shipping is less than those of closed cabinet or server racks.
How to Use Open Frame Rack?
Take the FS.COM 45U 2 post open frame rack as an example, there are many mounting holes on the two posts on which you can attach different devices like cable organizer and patch panel rack in 19’’ standard. You’d better put it on the flat ground lest it fall down.
The bold innovation, server rack without doors and panels, has been warmly welcomed by customers. Apart from the open frame rack, FS.COM offers a variety of racks and enclosures to meet your different applications and conditions. We aim to provide you with high quality products with reasonable price and best service. And we will forge ahead to deliver more versatile products to optimize your experience. If you are interested, follow us. We will release latest news of our achievements on products.
Fibre Channel (FC) is a serial I/O interconnect network technology capable of supporting multiple protocols. It is used primarily for storage area networks (SANs). Ethernet (and TCP/IP) is the most frequently used technology these days for communication between devices. But for storage, the dominant technology in a data center often is Fibre Channel. Fibre channel vs Ethernet switch: what’s the difference? This article makes an analysis from the following aspects: reliability, transmission speed, flexibility and cost.
Fibre Channel VS Ethernet Switch: Reliability
If you are actively engaged in optic communication, you may have noticed that the fibre channel switch is lossless while Ethernet switch is risk of dropping frame. Fibre Channel is often compared to Ethernet in terms of being a lossless protocol. As for fibre channel switch, it works smoothly without dropping a single frame, and frames must be delivered in order. FC switches will send signal when they’re congesting to other devices, so these devices stop sending frames, lest the frames are dropped. This in contrast to Ethernet which will just start dropping frames when congested, relying on upper layers (like TCP) to make sure everything keeps working.
Fibre Channel VS Ethernet Switch: Transmission Speed
The maximum data rate of the fibre channel switch in the very beginning is 1 Gbps. Now it has evolved up to 128 Gbps, with 8, 16, and 32 Gbps versions still available.
The Ethernet switch transmission speed ranges from Fast Ethernet (10/100 Mbps), Gigabit Ethernet (10/100/1000Mbps), 10 Gigabit (10/100/1000/10000 Mbps) to even some 40/100 Gbps speeds. In terms of transmission speed, the Ethernet switch seems to outweigh fibre channel switch. Whereas both are in a high speed evolution.
Fibre Channel VS Ethernet Switch: Cost
Cost is also an element to be considered. In most cases, Ethernet switches are much cheaper than Fibre Channel switches. What’s more, the maintenance is also a factor that should be considered. In large IT systems, if an Ethernet switch breaks down, most admins can deal with it. However, when there is something wrong with the fibre channel switch, you need to turn to manufacturers, instead. Comparing to Ethernet switch, fibre channel switch adopts more complicated design in that it should guarantee the extremely availability of data storage, and is equipped with management function.
Conclusion
Seen from above, there are significant differences between fibre channel switch and Ethernet switch. FC is a network standard to enable hosts (servers) to interconnect with storage devices. It’s completely different from Ethernet. A storage network switch is not the same as an Ethernet network switch. Initially, the only transmission medium of FC was fiber, but these days twisted pair copper wire is also available. That’s the opposite of Ethernet, which originally ran only on copper wires and then on fiber. FS.COM provides a variety of Ethernet switches and fiber switches which are mostly upgraded and optimized by our research and development staff, ranging from 10gbe switch to gigabit ethernet switch. For more information, you can search “Fiberstore” on website or YouTube.
The patch panel is a device that integrates both cable management and termination functions. The patch panel cabling is conducive to the structured cabling as the cables are put orderly on the patch panel. As the interface between multiple optical fibers and optical equipment, it serves as a termination unit that helps networking and fiber distribution from wiring closet to various terminal applications.
Lying on the front of it are an array of ports where we insert the cables. The ports in the back will lead to a server, switch, or another type of device. Each port in the front will have a cable coming from a PC, phone, fax, or any other device that needs to be networked together. Each port on the patch panel labeled with a number will connect via an Ethernet cable punch down on the back, through the wall, cross space or added to another location in the house.
Benefits of Patch Panel Cabling
It lets you use the proper type of cable in the proper place. Other than the point-to-point cabling, the patch panel contributes to a structured cabling, representing you a professional and neat look. In a large home or office with lots of connections, patch panels make quick work of re-configuring networks by enabling operators to identify where the cable is coming from and going to. By managing varying port densities and speeds in a single high-density patch panel, you save valuable rack space, helping to lower data center costs. A single patch panel can manage as many as (168) 10Gb ports.
Patch Panel Recommendations
We all know that the fiber transmits data faster than copper does. But the role of patch panels is to direct signal traffic rather than send the signal at a certain speed. Both copper and fiber panels are governed by the same TIA/EIA standards(the highest level of criteria that products must perform to) required to produce speed and signal performance for the rest of the cabling network. Patch panels must coerce data into performing up to the standards.
The 24 ports Cat5e shielded feed-through patch panel, a star product in FS.COM, can be mounted in to 1U racks. The shielded patch panel can minimize the crosstalk between cables, ensuring the smooth transferring of signals. It features with number coding, removable rear cable manager and rear cable management bar.
1U 19" high-density fiber patch panel offered by FS.COM can hold up to 48 fibers with 24 ports. High quality steel adapter panel is suitable for 1U 19" frame rack mount or cabinet, designed for backbone-to-backbone and backbone-to-horizontal fiber cabling. It is fully loaded with fiber couplers to save much cost.
Conclusion
A patch panel allows you great flexibility to move, add and change cables. It gives you the neat look and a simple way to manage and configure and reconfigure your network. If coordinated with a cable manager, the patch panels will do better in cable management since the cable manager has both horizontal and vertical options while the patch panel is only designed in horizontal type at present. It can be easily installed into the wall mount enclosure and rack mount enclosure. What’s more, the whole rack will be much nicer and the networks will work orderly. Remember that 30% space in the cable managers should be left for future growth.
What’s the difference between 1U and 2U cable managers? The most distinguishable one in my mind, is the number lying in their name. The “U”, also known as “RU”, stands for rack unit that is a unit of measure defined as 44.50 millimeters (1.75 in) by EIA. It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames. With this standard, we don’t need to play with complicated numbers, instead, a simple addition can work. For example, a 12U cabinet can accommodate twelve 1U devices or six 2U devices or four 3U devices. And so on.
Where and When to Use 2U Cable Manager
As the data center grows, you may have many cables to handle, thus the point-to-point cabling is not workable any longer. To realize and maintain a neat and clean cabling, you may need such tools as patch panels, enclosures, and cable managers, among which the cable managers are the primary consideration when you want a good cabling. 1U and 2U cable managers are the most common products for horizontal cable management at present. As people’s demands vary, 2U cable managers come in to being. The 2U cable manager allows for front-to-back and back-to-front cable runs. The finger ducts can be used for both upside and downside cable management. These products can be used above and below patch panel and network switch to organize and store cables.
2U Cable Manager Options
FS.COM offers a wide variety of 2U horizontal cable managers that range from cable manager with finger duct to cable manager with D-rings and cable manager with end rings manager.
2U Cable Manager with Finger Duct
This 2U cable manager is made of plastic in black coat. It is designed with flexible fingers, rear pass-through holes and a removable cover. The cover will enclose the cables within the fixed space, leaving the clean and neat appearance. In this way, people won’t see the tangled or crossed cables in it. The finger ducts are soft and durable, which offer proper bend radius and flexible operation of cable management, keeping the structured cabling system unhurt and totally functional.
2U Cable Manager with 5 D-rings
As an open-frame cable manager, it is made of metal with five D-rings standing on the panel in a good order. Horizontal cable management panels with D Rings are built with steel for strength and durability. Easily route large amounts of cable through robust rings. The D-Rings organize patch cords and maintain a required bend radius. They are available in sizes of 1U and 2U.
2U Cable Manager with End Rings Manager
It is a metal open-frame cable manager with vertical four rings and two horizontal rings, providing better cord management. It is also compatible with most standard 19” enclosures and open frame server racks, mounting hardware included. The end-rings will somehow protect the cables in case of unnecessary bending.
All these 2U cable managers have 1U versions. To meet your various requirements, we strive to keep improving, innovates unceasingly, making the FS.COM attentively the first-class enterprise.
عضو شوید
عضویت سریع
آمار مطالب
آمار بازدید
