Månadsvis arkiv: juni 2018
The modern world is developing in full speed, so is the telecommunication industry. Not long ago 10GbE switch had been a luxury, so was exclusively affordable to large enterprises. And many individuals and businesses used 10/100Mb switch and could only get to gigabit switch for 1Gb backbone. However, this situation is changing due to price dropping and proliferating market demand. Now more and more SMBs and individuals are using gigabit switch and attempt to access 10Gb switch. As thus questions like whether to deploy gigabit switch for 1Gb backbone or 10GbE switch as 10Gb backbone has stirred heated discussion on many forums. This article is to give some reference for 1Gb backbone vs 10Gb backbone selection guide.
Simply put, 1Gb backbone refers to the networking configuration that gigabit switch is used in the data center as core switch. A typical scenario in 1Gb backbone configuration is to run 10/100Mb access layer switches with 1Gb uplink back to a central gigabit switch. In this case the 1Gb uplink on the 100Mb switch receives the 1Gbps from the switch gigabit, then divides the 1Gb bandwidth to its terminal endpoints. Restricted by the normal port 10/100Mb, max. 100Mb is available for access points. As thus 100Mb switch has gradually been obsoleted by gigabit switch.
To achieve 1000Mbps and bring in PoE capability, modern operators often use gigabit PoE switch as access switch to cooperate 1Gb backbone gigabit switch. Here is a 1Gb backbone deployment scenario by FS.COM: Employing S5800-48F4S 48 port gigabit SFP switch as 1Gb backbone in the data center. Linking two 24 port PoE switches in the office to connect and power IP phones, wireless APs, desktops and laptops. Then running two wires to link two 8 port PoE switches in the warehouse for IP surveillance.
Figure 1: Deploying FS 48 port gigabit switch with 10Gb uplink as core switch and FS 8/24 port gigabit PoE switches as access switches.
Similarly, 10Gb backbone refers to the configuration that 10GbE switch serves as core switch in the data center. Then running gigabit switches with 10Gb uplink back to the central 10Gb switch. To illustrate 10Gb backbone configuration, here is a deployment scenario. In this case, we deploy S5800-8TF12S 10Gb SFP+ switch as core 10GbE switch in the data center. Using S3800-48T4S 48 port switch and S1600-48T4S 48 port gigabit PoE switch as access switches, we run fiber patch cables to corresponding 10Gb SFP+ uplinks on these access switches. As thus the 10Gb uplink bandwidth can be divided to the access gigabit switch normal port.
Assumption on the case 10 same endpoints are connected to 10 ports on the gigabit Ethernet switch. Then each can obtain max. 1000Mb from the 10Gb uplink bandwidth. In this case the gigabit speed is retained. If the upper layer switch is a gigabit switch, then each endpoint can only get 100Mb.
Figure 2: Deploying S5800-8TF12S 10Gb SFP+ switch as 10Gb backbone, while S3800-48T4S 48 port switch and S1600-48T4S 48 port gigabit PoE switch are for gigabit access switch.
Generally speaking, deploying gigabit switch for a 1Gb backbone vs 10GbE switch for a 10Gb backbone depends heavily on virtualization application. Even in a small office with only several PCs, demanding applications for high bandwidth may require a backbone 10Gb switch. That is, if you or your employees must deal with high-load pictures and videos every day, 10GbE switch backbone is a must to ensure smooth operation and work efficiency. Or you may easily get stuck in network congestion. Say a regular video conference in a midsize enterprise can randomly drop, which wastes time and drag down schedule process.
Also, pay attention to number of users. Counting all the current endpoints: computers, wireless APs, IP phones, etc. And try to measure the load traffic by plotting utilization. Then take future expansion into consideration. If your backbone gigabit switch ports are already hot for using the most bandwidth provided, and you still need to add office devices, then your network is on the verge of severe congestion. In this case 10Gb switch backbone or higher is the choice to go.
All in all, choosing between backbone gigabit switch vs backbone 10GbE switch, there is a bandwidth gap that access endpoints are available. If you deploy 10Gb switch as core switch and gigabit switch with 10Gb uplink as access switch, the normal port on the access switch can get max. 1000Mb bandwidth. However, if the backbone is 1Gb and your access switch is 100Mb, then only max. 100Mb bandwidth can be available in the access switch port. So for 1Gb backbone scenario where one use gigabit switch as core switch, deploying gigabit PoE switch instead of 100Mb switch as access switch is a solution to keep up with 1000Mbps speed.
In summary, 1 Gb backbone gigabit switch vs 10Gb backbone 10GbE switch selection depends on the bandwidth your virtualization applications require. In detail, 10Gb switch shall function as 10Gb backbone in the case mass data transfer is a regular task. Thus the gigabit switch normal ports can share max. 1Gb bandwidth. Otherwise you can remain your 1Gb backbone. But for 1Gb access, deploying gigabit PoE switch to replace your 100Mb access switch is a future-proofing and feasible solution to go. FS SFP switch is a good choice for 1Gb backbone core switch whereas SFP+ switch for 10Gb backbone core switch.
When buying a layer 3 capable 10GbE switch, we usually see product obviously described as owning multiple advanced features like MLAG, IPv4/IPv6 and sFLOW. But many people don’t know what they refer to. This article will focus on MLAG networking to illustrate what is MLAG, MLAG configuration advantages, and how to implement MC-LAG networking with Ethernet switch.
Figure 1: S5800-48F4S 48 port SFP switch supports MC-LAG networking.
MC-LAG networking is a networking type achieved by MC-LAG technology. MLAG (MC-LAG), abbreviation for Multi-Chassis Link Aggregation Group, is a new multi-device link aggregation technology for data center Ethernet switches. MLAG configuration centralizes constituent ports on separate chassis, mainly serves as reliable load functionality to increase bandwidth and provide redundancy in emergent breakdown of one of the device. MC-LAG networking is introduced by Arista in 2012. LAG is defined in the IEEE 802.1AX-2008 standard, where MC-LAG is not involved. Instead, MLAG implementations are vendor-specific. Say MC-LAG Juniper and mLACP Cisco. However, the combined chassis is still compliant to the IEEE 802.1AX-2008 standard.
Rooted in LAG but not ceased to advance, MC-LAG adds node-level redundancy to the normal link-level redundancy. As thus MLAG networking enables more virtual switches to simultaneously share the same LAG endpoint. In this way bandwidth is expanded and redundancy is enhanced once again.
Figure 2: A comparison of LAG networking vs MLAG networking configuration.
What’s the significant difference between MLAG vs STP (Spanning Tree Protocol)? Generally MC-LAG HA (High Availability) configuration is superior to Spanning Tree. Counting the MLAG configuration crossing “X”, all links can share the load during normal operation. However, Spanning Tree must disable some links to achieve loop prevention.
Figure 3: An illustration of HA MC-LAG implementation with multiple Ethernet switches link in data center three-layer architecture.
To illustrate the MC-LAG configuration method, take S5800-48F4S 48 port managed gigabit SFP switch as example. This low latency layer2/3 Ethernet switch is designed as carrier access switch and caters for 10G link aggregation networks. With advanced feature including MC-LAG, MPLS, IPv4/IPv6, SFLOW, SNMP etc. supported, this 10GbE switch is ideal for MLAG networking.
To implement MLAG, 4 10GE SFP+ ports on the 48 port switch can simultaneously be connected to multiple switches. As the following figure shows, connecting S5800-48F4S switch A1 with A2, and then linking the virtual Switch A (switch A1 and A2 as a whole) with S5800-48F4S switch B, a simple LAG + MCLAG networking is implemented. To go further to MLAG + MLAG configuration, S5800-48F4S switch B can also be replaced by two linked switches switch B1 and B2. As thus 4 × 10GbE uplink bandwidth is achieved. Meanwhile more switches share the endpoint 10GbE bandwidth at the same time. Besides, node-level redundancy is added to link-level redundancy due to two nodes on one link. For instance, the switch A2 can function well while switch A1 fails.
Figure 4: Deploying S5800-48F4S 48 port 10GbE switch for MC-LAG implementation.
MC-LAG networking is superior over LAG technology due to node-level redundancy added to link-level redundancy. The HA MLAG configuration also surpasses spanning tree for no link drop is required in loop prevention. Buying 10GbE switch for MLAG implementation, S5800-48F4S SFP switch is a natural fit to go. And for cases where power cabling is unavailable for your PoE powered devices (PD), you can consider buying a gigabit PoE switch as access switch for you MLAG networking.
For buying gigabit PoE switch, we usually concern about port numbers. However, power consumption is often linked with port number to cater for different wattage requirement. Say small PoE switch 8 port may come with 130W or 250W for option. High port-density 48 port PoE switch may be available for up to 600W or even higher. A midsize 24 port PoE switch with appropriate power consumption will be a feasible solution for wide network applications. Since a power over Ethernet switch failing to provide enough power for Powered devices (PDs) leads to low performance or random drops. On the other hand, for cost-effective concern taking a 24 PoE switch with superfluous power budget will waste money. This article will introduce PoE switch power consumption and recommend 2 24 port PoE switch with different power consumption: 400W vs 600W for your reference.
Power consumption of 24 port PoE managed switch refers to the max. total power the gigabit PoE switch enables to supply to all the PDs connected to it. That is, the total power wattage of all the connected PDs cannot exceed the power consumption of the 24 port PoE switch. So before deciding on how much a power consumption of PoE switch to buy, one must calculate the total power wattage of the PoE powered devices required to be used.
Another indispensable parameter of 24 PoE switch is the per PoE port power consumption, which is defined by PoE standard (IEEE802.3af) or PoE+ standard (IEEE802.3at). The PoE compliant switch supports up to 15.4W per port output power, while 12.95W input power is available for a PD due to transmission loss. Similarly the corresponding data of a PoE+ switch is 30W and 25.5W.
Figure 1: 24 port PoE switch power consumption PoE vs PoE+ standard comparison.
24 port PoE switch 400W vs 600W power consumption apply to different level power wattage. Taking S1400-24T4F 400W and S1600-24T4F 600W PoE switch 24 port as example, let’s compare the scenario when fully load these two 24 port PoE gigabit switches with IP cameras. Divide 400W and 600W by 24 respectively, we get 16.67W and 25W per port power, which means the 600W over 400W power consumption 24 port PoE+ switch can support 24 higher-power IP cameras. The suggestion is: If you should use dozens of higher-power PDs, the 24 port PoE switch 600W would be a more secure and future-proofing choice.
Figure 2: FS 24 port PoE switch power consumption 400W vs 600W model comparison.
Here we recommend the aforesaid advanced FS 24 PoE switches S1400-24T4F 400W and S1600-24T4F 600W for your reference. Compliant with IEEE 802.3af/at, these 24 port PoE gigabit switches can discern whether the PD is PoE or PoE+ standard for accurate power supply. This means FS 24 port PoE switch can supply up to 30W per port power, making it a natural fit for IP cameras, VoIP phones and wireless access points (APs).
In addition to high power consumption PoE capability, FS 24 port PoE managed switch features multiple port configuration to fit throughout different networks. The gigabit PoE switch centralizes 24 RJ45 auto-sensing 10/100/1000Mb PoE ports, 2 1Gb SFP ports and 2 SFP/RJ45 combo ports in a compact of 1RU form factor. The 24 PoE ports support up to 24 PDs simultaneously connected to the 24 port PoE switch within budget. The 2 SFP ports ensure optional fiber cabling and link aggregation of multiple switches, while the 2 SFP/RJ45 combo ports enhance network resiliency once again. In total one can enjoy a max. 1GbE density of 28 ports.
Figure 3: Deploying 24 port PoE switch S1400-24T4F 400W and S1600-24T4F 600W for desktops, APs, IP cameras and IP phones in data center.
Power consumption is an important specification for choosing a good but cheap PoE switch. For choosing 400W vs 600W PoE switch 24 port, one should first figure out each PD’s rated wattage as well as all the devices’ total power budget. Then make sure a single IP phone won’t exceed the per port power consumption of the 24 port PoE switch, and the total wattage won’t exceed the max. power threshold of the 24 PoE switch. If S1400-24T4F 400W is not enough for current applications or future AP proliferation, then go for S1600-24T4F 600W model. All in all, whatever you choose, 24 port PoE switch price in FS.COM will always be competitive in the market.
As a core hardware device in data centers, network switch is vital for setting up a reliable network. Meanwhile 48 port switch with high port density has become popular among enterprise-class, small to midsize and even home users. However, how to buy an optimal 48 port switch for different network environment confuses many people. This article will make an analysis of 48 port switch for your buying guide.
To buy an optimal 48 port switch for your network, one should take several factors into consideration. Above all, choose managed over unmanaged if possible. 48 port managed switch has advanced features in reliable performance, traffic control, custom management and security regulation. For modern applications requiring for high network privacy and resiliency, 48 port gigabit switch managed is a must. Besides, here lists other important factors for 48 port switch managed selection.
What kind of virtualization applications are you implementing? Do they require extra high switching capacity? Generally 48 port switches in the market come with 2 different speed basis: 48 port gigabit switch and 48 port 10Gb switch. For average customers without special requirements 48 port gigabit switch can well meet their demands. But for speed pursuers 48 port 10Gb switch should be deployed for smooth operation in high traffic.
In addition to regular port, pay attention to the uplink port on 48 port switch. For multiple switch connection, 48 port gigabit switch often comes with several 10G SFP+ uplink ports whereas 10Gb switch comes with 40G QSFP+ or even 100G QSFP+ uplink ports for link aggregation. With a few corresponding uplink ports reserved, the 48 port gigabit switch can access to 10G core switch. And 48 port 10Gb switch can cater for future demands like next generation Metro, Dater Center and Enterprise networks.
For situations where power outlets are unavailable for cabling devices, 48 port PoE switch is a natural fit. A typical aforesaid case is for connecting Powered Devices (PD): IP cameras, VoIP phones and wireless access points (AP). By deploying 48 port PoE gigabit switch, you can easily put an IP surveillance camera anywhere on the ceiling.
You can easily get the best 48 port switch with all advanced features once budget is not a concern. However, most people should note cost/performance ratio to get good but cheap 48 port switch. For good purchasing experience, here recommend you 2 best 48 port switch for reference.
Without PoE capability, here recommend S3800-48T4S 48 port switch managed. It comes with 48 10/100/1000Mb auto-sensing RJ45 ports and 4 10GE SFP+ uplinks for cost-effective gigabit access or 10G link aggregation. Thus you can easily deploy this 48 port Metro Ethernet switch either in access layer or as core switch. Also, with dual power available this 48 port gigabit switch managed provides redundancy in emergent outage.
Figure 1: Deploying FS S3800-48T4S 48 port gigabit switch as access switch and S1600-48T4S 48 port PoE switch for PDs in network layer.
FS recommends S1600-48T4S 48 port PoE switch for both 600W high PoE power budget and reliable hardware with software integration. With 48 1000M RJ45 ports and 4 10G SFP+ uplinks compact in 1RU, this 48 port PoE gigabit switch owns high density and space saving features. As a 48 port gigabit switch managed, it supports both Web Interface and CLI command. Therefore it offers enterprise-class functionality of free configuration, strong security and reliable RSTP. As PoE+ switch, it complies IEEE802.3af/at standard. Thus the PoE network switch can auto figure which standard the PoE enabled device supports and then supply power to it. To deploy S1600-48T4S 48 port switch, you can flexibly put it in a rack, on a wall or on desktop. Power on the switch. Then connect over 40 APs or other PDs all over the building with only one each cable is required to run for them.
Figure 2: S1600-48T4S 48 port PoE switch connecting to VoIP phones, wireless APs and IP surveillance cameras for intelligent switching and networks growth.
Take a long-term view, 48 port switch with high port density provides abundant ports for your current devices and room for future network growth. Buying a best 48 port switch requires one to consider its own demands for specific applications. Based on which, one should take based speed, uplink port configuration, PoE capability and other personal requirement into consideration. For cheap 48 port gigabit switch, we recommend you classic one S3800-48T4S and 48 port PoE switch S1600-48T4S. For 48 port 10Gb switch, you can also find one with decent offer in FS.COM.
Since the introduce of Power over Ethernet (PoE) technology, PoE LAN switch has become popular among wide users. However, newbies are usually confused with the multiple port configuration on gigabit PoE switch. Since there are already regular PoE Ethernet ports for powered devices (PDs), what are the function of other ports like console port, SFP/SFP+ port and combo port on gigabit PoE switch? This article will take 8 port PoE switch, 24 port PoE switch and 48 port PoE switch as example to illustrate multiple port for your reference.
Like regular Ethernet switch, gigabit PoE switch often has one built-in serial console port, say FS S1130-8T2F 8 port PoE switch. It is the port for controlling and managing switch since there are no display device for a switch. Usually console port on gigabit PoE switch is an RJ45 receptacle. To connect a computer directly to the 8 port PoE switch, one should use dedicated rollover cable rather than Ethernet cable for connection.To use console port, you need physical access to the appliance. Therefore for terminals without serial console port, one should attach a corresponding adapter to the devices before cabling.
Figure 1: A display of one console port on FS S1130-8T2F 8 port PoE switch for control.
RJ45 port on gigabit PoE switch is the regular PoE port to achieve data and DC power transmission for PDs. It is an auto-sensing 10/100/1000Mb copper port supporting only Ethernet cable (Cat5e/6/6a/7) for connection. Thus RJ45 port connection is limited to 1G speed and 100m (330ft) short distance transmission. Then how about longer distance transmission scenario?
Different from RJ45 port, SFP port on gigabit PoE switch has the opt of both short and long reach. Why? The mini GBIC port has inherited the compatibility of either copper or optical SFP connection. Provided you employ the corresponding SFP module and cable on power over Ethernet switch. For long distance transmission, you should use fiber SFP modules with fiber patch cable for optical link. For short distance, you can opt to use RJ45 SFP module with copper network cable on gigabit PoE RJ45 switch for electrical link. Gigabit PoE switch often provides 2 SFP port for optical connection or uplink aggregation requirement, which enhances network adaption resiliency of PoE powered switch. For instance, S1400-24T4F 24 port PoE switch has 2 SFP ports reserved, which caters for fiber uplink to upper layer switch.
Figure 2: A display of RJ45 ports vs SFP ports on FS gigabit PoE switch.
To illustrate SFP+ port on PoE Ethernet switch, we’ll take S1600-48T4S 48 port PoE switch as example. This 48 port PoE gigabit switch comes with 1 console port, 48 PoE+ RJ45 ports and 4 SFP+ ports. The 48 RJ45 ports are PoE ready to power on dozens of VoIP phones, IP cameras and wireless APs. The 4 SFP+ ports on gigabit PoE switch serves as uplink to connect 10G SFP switch for uplink aggregation.
Figure 3: Deploying S1600-48T4S 48 port PoE switch as gigabit access switch to link 10G SFP switch via SFP+ ports, and connect PDs.
Though manufactures often clearly label combo ports on gigabit PoE switch for identification, many people don’t know its function. Take S1400-24T4F 24 port PoE switch as example, 2 combo ports are reserved on this 24 port PoE managed switch. The combo port compounds RJ45 and SFP front ends in one single interface, thus it supports either copper or optical SFP link. However, you cannot use these two physical accesses on PoE network switch simultaneously. That is, once you activate combo SFP port on gigabit PoE switch, you also disable the opposite copper port.
Figure 4: A demonstration of combo ports on gigabit PoE switch: S1400-24T4F 24 port PoE switch from FS.COM.
To sum up, multiple ports on gigabit PoE switch owns different functionality, which enhances switching resiliency for different network cabling. RJ45 port on PoE powered switch is an normal one for copper link to PDs. SFP port of gigabit PoE switch provides options of fiber cabling or copper cabling due to fiber SFP module and RJ45 SFP module compatibility. 10G SFP+ port on 48 port PoE switch serves as uplink port for link aggregation in network layer. Combo port compounds RJ45 and SFP interface in one single fabric on gigabit PoE switch. So it helps to extend flexibility of physical access through the network. For 8/24/48 port cheap PoE switch buying, you can find decent offer here with optimal port configuration.
The telecommunication industry has always been developing with leaps and bounds and technology changes with each passing day. For common people with few network knowledge, the evolving optional network devices like PoE switch can be a big puzzle. What is PoE? What is the distinction of gigabit PoE switch vs normal switch? Read this article for reference.
PoE, abbreviation of Power over Ethernet, is a technology that enables Ethernet cable to supply power. Thus power sourcing equipment (PSE) can transmit both data and power to powered devices (PD) simultaneously via one single cable. PoE has two standards available on network switch: IEEE 802.3af/at. The former orginal PoE standard is defined in 2003, which provides 15.4 W power budget to PDs (12.95 W available for accessing). The latter PoE+/PoE Plus standard defined in 2009 provides up to 30 W (25.5 W) power.
PoE switch is one of the two types of PSE for PoE implement: endspan PoE switch and midspan PoE injector. To enhance network resiliency, gigabit PoE switches provided by FS.COM are highly compatible IEEE 802.3af/at managed PoE+ switches. For example, S1130-8T2F managed gigabit 8 port PoE switch with 2 SFP ports can connect to gigabit Ethernet network while S1600-48T4S 48 port PoE switch can use the SFP+ ports to connect with 10gbe switch for higher performance data transfer.
Figure 1: FS S1130-8T2F 8 port PoE managed switch can be flexibly placed in a rack, on a wall or on desktop.
In a word, PoE switch and normal switch differ from PoE accessibility. A regular Ethernet switch is not PoE enabled to supply power for end users over Ethernet. Therefore the user requires one extra cable to connect power outlets. However a normal switch can also become PoE ready by employing a midspan injector between the switch and PDs. The injector will add electrical power while receiving data signal from Ethernet switch end cable, and then deliver both data and power to PDs. But in this circumstance the injector also needs a wire for power. When using gigabit PoE switch, only one power cable is required. Then the PDs can be directly plugged into the PoE gigabit switch port for both data transmission and power supply. The illustration and Table below list the differences of employing PoE switch vs normal switch while adding PoE to network.
Figure 2: An illustration of deploying PoE gigabit switch vs normal switch when adding PoE to network.
|PoE Switch||Normal Switch|
|Required Accessories||Easy for management (power and transmission)||Require separate two wires for powering on normal switch and PoE injector|
|PoE Access Method||Upgrade to PoE network by replacing the normal Ethernet switch with PoE Ethernet switch||Install PoE injector between switch and PDs to add PoE capability to the existing non-PoE switch|
|Emergency Reaction||Potential chance of the whole system’s outage||Only one device be affected|
As mentioned above, PoE switch differs from normal switch for supplying power to PDs in the meantime of data delivery. Though the normal switch system can also acquire PoE by installing injector, PoE endspan has the superiority of direct Power over Ethernet ability. Counting to this, gigabit PoE switch owns edges over normal switch as follows. First, it enables PDs like IP surveillance cameras to be placed almost anywhere: on the ceiling, concealed in a wall, or even underwater while only one cable is needed to run to them. Second, it saves extra expanse and time for power cabling and injector installation. Third, with simplified cabling of all PDs directly connected to gigabit PoE switch, the data center is easy for management and control. Besides, PoE gigabit switch itself is designed with advanced features like high-performance hardware with software, auto-sensing PoE compatibility, strong network security and environmental adaptability.
Gigabit PoE switch can supply power to PDs in the meantime of data transmission via one single Ethernet cable while normal switch can only send data to them. For PoE implement, normal switch requires a power-on auxiliary injector as midspan between switch and powered devices. Thus PoE switch owns advantages of direct PoE connection, easy and flexible placement, cost-efficiency, simplified management and etc. For any applications of IP surveillance cameras, VoIP phones and wireless APs, PoE switch over normal switch is a good solution to go.