Open networking possesses distinct interpretations in different fields. It gradually picked up steam when adopted in open network switching, attracting flocks of vendors to take a share from the giant and burgeoning market. What is open networking? This article facilitates us to have a close look at it.
What Is Open Networking?
Open networking appeals to breaking the tight linkage between the hardware and software. Previously, network switches are sold with hardware and software together. That is to say, if users buy a Juniper EX or MX series network switches, they also buy JUNOS; if customers buy a Cisco Catalyst network switch, they have to buy Cisco IOS. With the advent of open networking, things vary greatly alongside the separation of proprietary hardware from its software. Ethernet switch now lives in a disaggregated world where these elements can be chosen from the most appropriate supplier. Not only hardware and software, but also technical support and accessories are traded respectively.
How Does Open Networking Impact on Network Switch?
Open network switching hardware was first adopted by tech giants such as Google and Facebook, followed by a slew of enterprises. Besides, Cisco is jumping on the bandwagon of disaggregation in data center networks. It will allow data center customers to run its Nexus operating system (NX-OS) on third-party switches and to use other network operating system on its Nexus switches. Having been backed by several hyperscale companies, open networking drives the network switch to develop in a decentralized way.
How Can Network Users Benefit From Open Networking?
Flexibility
Open network vs. closed network, flexibility wins. As it is stated elsewhere, open means choices and options. You can configure the devices with equipment, software and architecture designs from different vendors. And you can turn down the affiliated OSes that may be feature-rich for you, and refer to those satisfying your rigid demand. Open networking entitles you to the architectural freedom to deploy the best topology and protocols for your environment. This has also fostered innovation dramatically with technologies and practices, allows enterprises to move faster to capture opportunity in the market.
Cost-saving
With open networking, you can save budget on dealing with what breaks down rather than throwing away the malfunctioned network switch. That is to say, if open source hardware fails, then you can change it; if software can no longer satisfy your needs, then replace it with other open source software. For example, some people have encountered the issue that the switch whines loudly. In this case, you can decide to make changes only on the hardware. Targeted troubleshooting also saves time and energy.
Unified Development
From the perspective of the vendor, they can jump out of the scenario where they work behind closed doors, and turn to seek common points while reserving difference from others. You want to survive in the market, you need to be open, inclusive and be compatible to the third parties gadgets. A closed system by definition prevents others from openly interfacing with your offer, thus stifling collaboration and increasing the time to market. FS.COM not only released the open networking switch, but also recently sought cooperation with Cumulus Networks to add the leading open source operating system—Cumulus Linux to the FS N-series 40G and 100Gbe switches. This progress brings high-end features like automation to customers.
Conclusion
Open networking represents the general trend. As vendors rush in swarms, customers can stay and wait to reap the benefits. Choose what suits your hardware needs from household names such as FS.COM. This freedom extends to every aspect of your purchase including cables and optics.
The network switch has now grown in the same way that the server was developed in the market. Proprietary switches are now challenged by the white box switches that bring open source software. There are many network operation systems that can be accessed through ONIE for bare metal switches. Among them, Cumulus Linux is the most popular one. How does it develop and why does it stand out from the rest?
Cumulus Linux Overview
Cumulus linux is a version of the open source operating system built to run on bare-metal switch hardware. Cumulus Linux is a software distribution that runs on top of industry standard networking hardware. Linux has a very full-featured networking stack and the mature linux operating system has already been in use for implementation of technologies from most networking vendors prior to incorporating it into their proprietary platforms. Sysadmins have access to and get familiar with a huge variety of tools for managing and operating linux platforms. It is said that 34% of the Fortune 50 have already adopted Cumulus linux. Then why Cumulus linux is popular among white box switches?
Analysis on White Box Switch Market
Over the years, consumers have bought proprietary network switches from well-known vendors who installed their operating system on the original hardware. Now with the advent of white box switches, customers have found a more flexible approach to create their own switches. They can get hardware directly from the ODM at a discounted rate compared to similar switches from traditional networking vendors, because there are no network operating system installed in it. Vendors like Cumulus Networks and Big Switch Networks offer operating systems that can run on a variety of hardware switching platforms. These platforms can be installed into multiple bare metal hardware that come from different suppliers.
The white box switch which enables people to purchase hardware and software independently is gaining popularity. It excels traditional switches in cost and the flexibility. Cumulus linux gives programmers and developers the ability to customize the platform to their needs.
Why Cumulus Linux Is Popular Among White Box Switches?
Built for automation, scalability and flexibility, Cumulus Linux is the world’s most flexible open network operating system for bare metal switches which allow you to build a data center network that ideally suits your business needs.
Cumulus Linux Provides Economical Scalability.
Since Cumulus Linux is Linux, all applications available with a Linux operating system are also available with Cumulus Linux. With off the rack hardware and a standardized linux stack, people can increase efficiency in operation by reducing production time. Both CapEx and OpEx can be lowered.
Cumulus Linux Is Built for the Automation Age.
Cumulus linux is a powerful, networking-focused linux based free operating system that offers a complete open architecture and is designed for easy automation. With automation, all of your configurations are stored in one place. No longer need to log into a dozen switches and start typing to make changes on multiple switches. Using automation, you can accomplish the change in one centralized repository and push them out to your switches with the flip of a switch.
Cumulus Linux Provides Choice and Flexibility.
Cumulus Linux currently runs on 50+ hardware platforms from 9 different vendors, and boasts two different types of silicon. It greatly increases the choices of hardware and avoids any potential hardware lock in or supply chain issues. Build your network based on your needs and you budget, and pivot easily as the industry changes.
Conclusion
Providing economical scalability and choice flexibility, Cumulus Linux, the leading network operating system, greatly boosts the adoption of white box switch. Unless you try Cumulus Linux, you can never taste its charming.
Lots of customers have found the letters “CM”, “CMR” and CMP” in the product description when purchasing copper cables like Cat5e cable and Cat6 cable. These terms are the most common cable jacket ratings specified by the National Electric Code (NEC). CM rated cables that are designed for general use won’t be covered in this article. Let’s see the difference between CMR vs. CMP in their applications.
Introduction of CMR vs. CMP
CMR cable stands for “Communications Multipurpose Cable, Riser”. It is also referred to as “riser-rated cable” and designed to prevent fires from spreading between floors through risers or vertical shafts, that is to say, it can self-extinguish when ignited. As for flame-resistance, it does better than the CM cable, so CMR cable can be used where CM cable would be required. Consequently, CMR cable is more expensive than CM cable.
CMP cable stands for “Communications Multipurpose Cable, Plenum”, which is the so-called plenum cable. It is constructed to limit the amount of smoke emitted in case of a fire and prevent flame from spreading to more than five feet. In some places where air travels throughout a building via plenum spaces, it is critical that Ethernet cable is made of the material that doesn’t give off toxic fumes if burned. CMP cable is the one suitable for installation into air plenum spaces.
When it comes to the difference between CMR vs. CMP, as the flammability requirements for CMP cables are stricter than CMR cables, plenum cables can always replace riser cables, but not the reverse. Plenum rated cable is always twice as expensive as riser cable.
CMR vs. CMP: When to Use Them in Your House?
Even though we have read lots of materials telling what is CMR vs. CMP, the knowledge about when to use these cables truly matters for the mass people. Only being applied to the practice, can the theory be tasted. Let’s see the following illustration. In the picture, the CMP plenum cables run horizontally in the structured ceiling and the dropped ceiling or under a raised floor where is typically considered plenum. This is largely due to the fact that this place is full of fast-moving air as it facilitates air circulation for heating and conditioning systems. The presence of fresh air can bring dander of rapid flame spreading or dangerous gases distribution, thus causing damage to the furniture and threatening people’s lives. Therefore, CMP must be used in air ducts or vents. Typically, it is the prime choice for cabling construction in train station, airport and other public people-intensive places where we must prevent hazards to human health and safety from wiring.
CMR riser cable runs between floors in non-plenum areas as the red line indicates. They are usually run vertically from the basement to the upper floor, so long as the cable does not need to run through an air duct.
CMP, CMR and the like are the NEC’s ratings for the cable jacket. Different types of copper cables like Cat5, Cat5e and Cat6 cables all have CM, CMR, CMP versions. They have the same exact copper inside. The difference is the outer casing or “jacket” that surrounds a cable’s internal wiring and insulation.
Conclusion
This article covers what is riser cable and plenum cable, when to use plenum cable and riser cable. Choosing the right CMR vs. CMP cable is really important. It not only helps prevent dangers but also avoid unnecessary interference by local authorities if you fail to meet the fire codes. If there are any problem or puzzle during cables selecting or application, FS excellent tech team and sales team would like to offer help.
As switch stacking, the premium feature of few network switches, evolves as a core competence of Ethernet switches in the market, vendors strives to release varies stackable switches and produce switch stacking tutorials for customers. This post will take FS S3900-48T4S 48-port stackable switch as an example to explore how to stack switches together..
Introduction to FS S3900 48T4S 48-port Stackable Switch
Port density and Scalability
S3900 48T4S 48-port gigabit switch comes with 48 downlink RJ45 ports that are triple speed copper ports connecting with end-devices and four 10Gbps SFP+ uplink ports that connect toward the core of the network. With 176Gbps switching capacity. This network switch delivers wire-speed switching performance on all Gigabit ports which support auto-negotiation for port speed and duplex mode. The 4 built-in 10G SFP+ ports provide uplink flexibility, allowing the insertion of fiber or copper, Gigabit or 10G transceivers. These 10Gbps SFP+ port can work as both uplinks and stacking links to servers or service provider, corporate, or campus networks, reducing bottlenecks and increasing the performance of the access network.
Reliability and Energy Efficiency
The dual power supply can ensure the effectiveness of mission-critical network. If one power supply fails for some reason, the other one will take over seamlessly to sustain the normal running of network. Moreover, the design of the S3900 48-port stackable switches incorporates high energy efficiency in order to reduce the impact on the environment. The fan is smart controlled by the traffic. When the switch runs busy, the fan inevitably generates much noise which, however, won’t cause distress. The Green Ethernet power-saving features can be translated into that, on an inactive link, the port moves into inactive mode and saves power while keeping the administrative status of the port up.
How to Stack 48-Port Gigabit Switch?
The S3900 48T4S 48-port network switch can allow up to six switch being stacked together, in which it excels S3800 series switches. Use DAC, AOC or transceiver modules plus fiber optic cable can simply join the switches together. Only the rightmost two SFP+ ports on the switch can be used to stack, and should be cross linked, as shown in the following picture.
How to Manage Switch Stacks Effectively?
Managing switch stacks is also not an easy work because there is a set of network switches in one stack unit. As for the S3900-48T4S stackable switch, an industry-standard command-line interface (CLI), accessed through the console port or Telnet*, provides a familiar web user interface and command set for users to manage the switch. Moreover, just one command and a reboot* can realize switch stacking, more convenient than common switch stacking. An embedded user-friendly web interface helps users to quickly check and manage the 48-port managed switch.
*Note 1: in stacking process, you need to pull and plug the console cable into each 48-port managed stackable switch repeatedly. By contrast, keep telnet cable connected with one switch is enough.
*Note 2: the one being restarted firstly is the stack master.
Conclusion
The S3900 48T4S 48-port stackable switch, born in this era where high speed network is badly needed, is an ideal Gigabit access switch for SMB, enterprise, and campus networks to boost productivity. And it is ideal for Internet Service Providers (ISPs) and Multiple System Operators (MSOs) to provide home users with triple-play services with up to Gigabit bandwidth.
Recently, many people have jumped on the bandwagon to use the 24-port Gigabit managed switch with advanced administrative controls. In particular, 24-port switch with PoE technology provides people with great convenience. However, the more power it sustains, the noisier it is. Have you been hassled by the endless noise or interrupted in your work? It is time to put an end to work frustration with fanless 24-port Gigabit switch.
What’s the Magic with Fanless 24-Port Gigabit Switch?
A Gigabit Ethernet switch without fan doesn’t mean that it does not have cooling system. Instead, it adopts a passive cooling system which achieves high level of natural convection and heat dissipation by a heat spreader or a heat sink to maximize the radiation and convection heat transfer modes. The passive cooling makes your switch dumb but not numb, as it still works efficiently. In a word, fanless switch is the most suitable in silent and energy-saving environments. Here introduce three distinctive fanless 24-port Gigabit switches.
Fanless 24-Port Gigabit Switch Recommendation
FS 2800-24T4S Fanless 24-Port Gigabit Switch
S2800-24T4F 1000Base-T switch features 24-port 100/1000Base-T ports and 4 combo RJ45 SFP ports that enable user to mix fiber and copper cabling on a single switch. This 24-port Gigabit fanless switch is designed to meet the demand of cost-effective Gigabit access or aggregation for enterprise networks and operators. It adopts high performance processor to provide full speed forwarding and line-dormant capacity to offer customs multitudinous service features. In addition, S2800-24T4F supports multiple configuration modes to make it easy for network management and maintenance. This switch comes with a four-year limited warranty, including any quality problems during the free maintenance.
HP ProCurve 1800-24G Fanless 24-Port Gigabit Switch
The ProCurve Switch 1800-24G is a 22-port 10/100/1000 switch with 2 dual-personality ports for RJ-45 10/100/1000BASE-T or mini-GBIC fiber Gigabit connectivity. This fanless switch is managed via an intuitive Web interface, ideal for deployment in open offices or homes that require silent operation. It can be mounted on a desk, shelf, wall or in a rack cabinet. However, the demerit of this 24-port gigabit switch is that it doesn’t possesses stacking port.
FS 3900-24T4S Fanless 24-Port Gigabit Switch
FS newly-released S3900-24T4S 10/100/1000BASE-T 24 port Gigabit switch comes with 4 10GE SFP+ uplinks ports. Since its debut, it has gained a lot of attention by its multifunction. As an advanced layer 2 Plus (layer 3 Lite) Gigabit managed switch, it supports stacking with 10G uplinks. In addition, the S3900 24-port gigabit stackable switch offered by FS boats an user-friendly web interface which makes it a snap to configure ports. An industry-standard command-line interface (CLI), accessed through the console port or Telnet, helps simplify the setup and operation of the network. The S3900-24T4S 24-port managed switch is almost an omnipotent switch for choice under many circumstances.
Conclusion
Kill the noise, and attend to your work. Fanless 24-port Gigabit switch ensures noiseless operation and increases the reliability and energy efficiency of the system. Listening to the voice of customers to understand customer issues, FS, a network solution provider, strives to provide innovative and professional solutions for you.
The entire network today has expanded and there emerge faster Ethernet switch like gigabit Ethernet switch and even 10gb switch which provide us with higher information switching speed. However fast they can forward the data packets, they still undergo complicated procedures. Now there is a way to simplify the data forwarding while maintaining the high forwarding speed. That is the MPLS network.
What Is MPLS Network?
MPLS stands for Multi-Protocol Label Switching. It is a system for fast packet switching and routing that provides the ability to target, route, forward, and exchange network traffic. In most cases, MPLS is regarded operating at Layer 2.5 as it enables data packets to be forwarded at layer 2 rather than layer 3. MPLS is a packet-labeling technique that can map IP addresses to simple fixed-length labels for different packet forwarding and packet switching techniques. MPLS can provide applications including VPNs (Virtual Private Networks), traffic engineering (TE) and Quality of Service (QoS). So we know that MPLS is a packet-labeling technique that prioritizes data, but how does it actually work?
How Does the MPLS Network Work?
In MPLS network, packets are directed through the network based on an assigned label. People tag some packets with certain markings. We can compare the packet to the shipping crate that ships something between two locations. If at every stop, the shipping company needs to open the box to figure out what it is and where it’s going to, it will cost a lot of time and energy. Now if we put the label outside indicating where the packet goes from and to, then whatever shipping company see it will know how to deal with it without opening it.
The basic component of MPLS network is label switching router (LSR). An ingress router with MPLS will label data packets (mail packages) on entry to the network (post office), so routers (mail workers) know exactly where the data is going to without having to open the package again and again. The transit router in the MPLS domain transmits the packet to the egress LER according to the label along the label switching path (LSP) consisting of a series of LSRs. Finally, the egress router that resides at the exit is responsible for stripping the label from the packet and forward it to the destination. In a word, transit router switch the data packet according to the attached label, while egress and ingress routers work for the transformation between MPLS and IP technology.
Advantages of MPLS Network
Here, some people may say “MPLS is indeed a good thing, but why should I bother to change to it as my current network runs well?”. This part will tell the advantage of using MPLS network.
First, regarding its cost, it is a cost-effective solution. Multiprotocol Layer Switching (MPLS) is an extremely scalable mechanism for high performance telecommunication networks. It allows for inter-connectivity growth of your network with minimal addition of hardware. An MPLS network uses communications via a cloud based network with each node connecting to the network providers MPLS cloud, which allows for adding new remote connections without the requirements of adding hardware at your primary site.
Second, let’s see its performance. It provides alternative network paths to improve up-time and reduce network congestion. It also allows for multiple traffic types to traverse the network, thus improving bandwidth utilization. It can also improve end user experience by allowing multiple classes of services to different types of traffic such as VOIP.
Third, one of the most notable benefits of MPLS is that it is applicable to any network layer protocol. It supports transport over Internet Protocol (IP), Ethernet, Asynchronous Transfer Mode (ATM) and frame relay; any of these protocols can be used to create an LSP.
Conclusion
In a nutshell, MPLS was originally put forward to improve forwarding speed. It decreases the forwarding overhead on the core routers. To make full use of it, you can go to the website www.fs.com and consult our experts. FS not only provides top-notch Ethernet switch but also first-class solutions.
The Internet switch, since its birth, has been growing rapidly not only in function but also in performance. Experts have researched and developed generations of Internet switches, while the majority of people may be new to the devices, not taking fully advantage of them. This paper aims to help you get further understanding of Internet switch definition, benefits and working principle.
What Is an Internet Switch？
An Internet switch is another name of network switch. It is a critical component in many business networks, for the fact that they connect various PCs, printers, assess points, phones, lights, servers and other hardware. With an Internet switch, users can send and receive information and approach shared resources in a smooth, highly secure, and transparent manner. It addresses the low speed which was previously the shortcoming of hub, to sustain an efficient and high-speed information exchanging among hosts.
Why Use an Internet Switch?
Add More Ports to Your Router
In household use, many families view router as a must and Internet switch as an alternative. The fact is that the ports left for use is few when the router is connected and working. Given this, some will turn to an entry-level switch to add more Ethernet ports to the network. This kind of switch is usually the unmanaged switch that has no settings or special features itself. Your router continues to handle your Internet connection, letting your devices talk to one another and restricting what certain devices can do through parental controls or other settings—the switch is effectively invisible.
Add Ethernet All over Your House
Though the Wi-Fi is prevalent and convenient, you still need wired Ethernet if you want to play online games, stream 4K video or transfer large files over your network frequently. That can be guaranteed by a gigabit Ethernet switch to give you high speed and smooth network accessing.
Use Wires to Improve Wi-Fi
It is known to all that Wi-Fi can be freely accessed by anyone who has the password. However, as the users increase, the network may lag and be congested. Here you can install an Internet switch to improve your Wi-Fi performance by reducing the number of devices competing for wireless bandwidth. Faster switches like 10gbe switch, 40gbe switch and 100gbe switch will be recommended here.
How Does an Internet Switch Work?
As the name suggests, an Internet switch is a device to switch information in the local area network. But how? It is the intriguing part of the Internet switch. Well, a network switch determines where to send each incoming message by looking at the physical device address (also known as the Media Access Control address or MAC address). Inside the switch there is a table that match each MAC address to the port from which the MAC address has been received. If a frame is to be forwarded to a MAC address that is unknown to the switch infrastructure, it is flooded to all ports in the switching domain. Broadcast and multicast frames are also flooded. Otherwise, it goes to the specific port.
Conclusion
Having read this article, you are expected to have a generally understanding of the Internet switch. Internet switch steps into people’s life, bringing great benefits and convenience. Undoubtedly, it is a breakthrough in network technology. If you determines to get it, give full play to its role to better serve you applications.
With the development of technology, no matter how far you are away from families, you can communicate with them at any time in any places. The same is true to the optic communication, regardless of the physical locations of two hosts or the different VLANs they belong to, they can exchange with each other by inter VLAN routing. Then what is inter VLAN routing and how to configure inter VLAN routing on layer 3 switches?
What Is Inter VLAN Routing?
In figure 1, three computers connected to a gigabit Ethernet switch form a LAN (local area network) within a limited area. However, they cannot communicate with hosts in another LAN, because there is no connection between these Ethernet switches. Then there comes the VLAN which provides us with logical separation or segmentation of our networks to facilitate communication among hosts in different LANs. However, each VLAN is a unique broadcast domain, so computers on separate VLANs are unable to communicate with each other by default. There is a way to solve the problem, and that’s what we are going to shed light on—inter VLAN routing.
Fig. 1 LAN and VLAN in Networking
The process of forwarding network traffic from one VLAN to another VLAN using routing is known as inter-VLAN routing. One of the ways to carry out inter-VLAN routing is by connecting a router to the switch infrastructure. When using a router to facilitate inter-VLAN routing, the router interfaces can be connected to separate VLANs. Devices on those VLANs communicate with each other via the router. Apart from that, a more convenient way is introduced—configure inter VLAN routing on layer 3 switches. Layer 3 switching is more scalable than a router which only provides a limited number of available ports.
How to Configure Inter VLAN Routing on Layer 3 Switches?
To enable a layer 3 switch to perform routing functions, the switch must have IP routing enabled. 10gb Ethernet switch and 40gb Ethernet switch are recommended for working as layer 3 switch.
Fig.2 Inter VLAN Routing on Layer 3 Switches
In figure 2, layer 3 switch is configured with IP address 10.0.0.1. VLAN10 and VLAN20, with IP address 10.10.10.10 and IP address 10.20.20.20 respectively are configured on layer 2 switches. These two IP addresses will be the default gateway addresses for hosts belonging to VLAN10 and VLAN20 on the layer 2 switches respectively. Also, all interfaces connecting the three switches must be configured as trunk ports to allow VLAN10 and VLAN20 tagged frames to pass between switches. Traffic between VLAN10 and VLAN20 will be routed by the layer 3 switch after configuring inter VLAN routing. These steps can be achieved by VLAN configuration command below.
Create VLANs 10 and 20 in the switch database
Assign port Fe0/1 in VLAN 10 and port Fe0/2 in VLAN 20
Create trunk port Fe0/24
Enable layer 3 routing and create VLANs 10 and 20 in the switch database
Create trunk ports Fe0/47 Fe0/46
Configure Switch VLAN Interfaces (SVI) to acts as a virtual layer 3 interface on the layer 3 switch
Conclusion
VLAN is created to enable the communication among hosts in different LANs. Inter VLAN routing is developed to realize the exchange among hosts in different VLANs. Inter VLAN routing on layer 3 switch without a router is also approachable with the development of technology. For more configuration about network switches, please refer to our website www.fs.com.
With the development of technology, no matter how far you are away from families, you can communicate with them at any time in any places. The same is true to the optic communication, regardless of the physical locations of two hosts or the different VLANs they belong to, they can exchange with each other by inter VLAN routing. Then what is inter VLAN routing and how to configure inter VLAN routing on layer 3 switches?
What Is Inter VLAN Routing?
In figure 1, three computers connected to a gigabit Ethernet switch form a LAN (local area network) within a limited area. However, they cannot communicate with hosts in another LAN, because there is no connection between these Ethernet switches. Then there comes the VLAN which provides us with logical separation or segmentation of our networks to facilitate communication among hosts in different LANs. However, each VLAN is a unique broadcast domain, so computers on separate VLANs are unable to communicate with each other by default. There is a way to solve the problem, and that’s what we are going to shed light on—inter VLAN routing.
Fig. 1 LAN and VLAN in Networking
The process of forwarding network traffic from one VLAN to another VLAN using routing is known as inter-VLAN routing. One of the ways to carry out inter-VLAN routing is by connecting a router to the switch infrastructure. When using a router to facilitate inter-VLAN routing, the router interfaces can be connected to separate VLANs. Devices on those VLANs communicate with each other via the router. Apart from that, a more convenient way is introduced—configure inter VLAN routing on layer 3 switches. Layer 3 switching is more scalable than a router which only provides a limited number of available ports.
How to Configure Inter VLAN Routing on Layer 3 Switches?
To enable a layer 3 switch to perform routing functions, the switch must have IP routing enabled. 10gb Ethernet switch and 40gb Ethernet switch are recommended for working as layer 3 switch.
Fig.2 Inter VLAN Routing on Layer 3 Switches
In figure 2, layer 3 switch is configured with IP address 10.0.0.1. VLAN10 and VLAN20, with IP address 10.10.10.10 and IP address 10.20.20.20 respectively are configured on layer 2 switches. These two IP addresses will be the default gateway addresses for hosts belonging to VLAN10 and VLAN20 on the layer 2 switches respectively. Also, all interfaces connecting the three switches must be configured as trunk ports to allow VLAN10 and VLAN20 tagged frames to pass between switches. Traffic between VLAN10 and VLAN20 will be routed by the layer 3 switch after configuring inter VLAN routing. These steps can be achieved by VLAN configuration command below.
Create VLANs 10 and 20 in the switch database
Assign port Fe0/1 in VLAN 10 and port Fe0/2 in VLAN 20
Create trunk port Fe0/24
Enable layer 3 routing and create VLANs 10 and 20 in the switch database
Create trunk ports Fe0/47 Fe0/46
Configure Switch VLAN Interfaces (SVI) to acts as a virtual layer 3 interface on the layer 3 switch
Conclusion
VLAN is created to enable the communication among hosts in different LANs. Inter VLAN routing is developed to realize the exchange among hosts in different VLANs. Inter VLAN routing on layer 3 switch without a router is also approachable with the development of technology. For more configuration about network switches, please refer to our website www.fs.com.
With the development of technology, no matter how far you are away from families, you can communicate with them at any time in any places. The same is true to the optic communication, regardless of the physical locations of two hosts or the different VLANs they belong to, they can exchange with each other by inter VLAN routing. Then what is inter VLAN routing and how to configure inter VLAN routing on layer 3 switches?
What Is Inter VLAN Routing?
In figure 1, three computers connected to a gigabit Ethernet switch form a LAN (local area network) within a limited area. However, they cannot communicate with hosts in another LAN, because there is no connection between these Ethernet switches. Then there comes the VLAN which provides us with logical separation or segmentation of our networks to facilitate communication among hosts in different LANs. However, each VLAN is a unique broadcast domain, so computers on separate VLANs are unable to communicate with each other by default. There is a way to solve the problem, and that’s what we are going to shed light on—inter VLAN routing.
Fig. 1 LAN and VLAN in Networking
The process of forwarding network traffic from one VLAN to another VLAN using routing is known as inter-VLAN routing. One of the ways to carry out inter-VLAN routing is by connecting a router to the switch infrastructure. When using a router to facilitate inter-VLAN routing, the router interfaces can be connected to separate VLANs. Devices on those VLANs communicate with each other via the router. Apart from that, a more convenient way is introduced—configure inter VLAN routing on layer 3 switches. Layer 3 switching is more scalable than a router which only provides a limited number of available ports.
How to Configure Inter VLAN Routing on Layer 3 Switches?
To enable a layer 3 switch to perform routing functions, the switch must have IP routing enabled. 10gb Ethernet switch and 40gb Ethernet switch are recommended for working as layer 3 switch.
Fig.2 Inter VLAN Routing on Layer 3 Switches
In figure 2, layer 3 switch is configured with IP address 10.0.0.1. VLAN10 and VLAN20, with IP address 10.10.10.10 and IP address 10.20.20.20 respectively are configured on layer 2 switches. These two IP addresses will be the default gateway addresses for hosts belonging to VLAN10 and VLAN20 on the layer 2 switches respectively. Also, all interfaces connecting the three switches must be configured as trunk ports to allow VLAN10 and VLAN20 tagged frames to pass between switches. Traffic between VLAN10 and VLAN20 will be routed by the layer 3 switch after configuring inter VLAN routing. These steps can be achieved by VLAN configuration command below.
Create VLANs 10 and 20 in the switch database
Assign port Fe0/1 in VLAN 10 and port Fe0/2 in VLAN 20
Create trunk port Fe0/24
Enable layer 3 routing and create VLANs 10 and 20 in the switch database
Create trunk ports Fe0/47 Fe0/46
Configure Switch VLAN Interfaces (SVI) to acts as a virtual layer 3 interface on the layer 3 switch
Conclusion
VLAN is created to enable the communication among hosts in different LANs. Inter VLAN routing is developed to realize the exchange among hosts in different VLANs. Inter VLAN routing on layer 3 switch without a router is also approachable with the development of technology. For more configuration about network switches, please refer to our website www.fs.com.
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