I bought this switch as a replacement for our old cisco nexus 3172PQ. It meets all our needs since it provides salient functions as an aggregation switch. In my experience, it’s hard for us to find an equivalent to this switch at such a budget.

We need switches that can do many MLAGs and this switch can be configured with up to 55 active MLAGs simultaneously. The support from FS is strong and prompt when we need some guidance in connecting all devices.

I've been a fan of FS products for a few years now, most of our transceivers and DACs deployed in the environment came from them. I've been wanting to try out their switches and finally got this chance: we are starting as Internet Service Provider in France. Recently we plan to build a network supporting DATA to deliver FTTO and FTTE to our customers, and we need at least 2 core switches that should be able to provide BGP, OSPF, and BFD option. Besides, we need 4 devices for aggregation and 4 for access. All the access ports have to be 1Gb ports at minimum.
I researched switches for ages before settling with the S5850-48S6Q. We had considered the Brocade VDX 6740 but the cost was way too much for our budget, and we were informed that they are too picky regarding optics. After reading through the PDF manual for the S5850-48S6Q switch, I found that the port configuration and rich feature sets are rather similar with the VDX. Besides, the S5850 is cost-friendly and more accommodated to generic transceivers, this way I can use the optics right at hand. So I ordered two of them for testing.
My S5850-48S6Q arrived at my doorstep just on time. They are well-packaged with corrugated boxes to protect the items from any damage, vibration or mishandling in transit. The switches are made of solid metal and the build quality is top notch. The feature set is just right for me. It appears to do everything I’ve expected, like VLANs, Link Aggregation, MAC and 802.1x. I'm personally using most of the Qos features, several VLANs and lots of security features. They also support any of the features a core switch may need, including IPv6 static routing, link-aggregation groups (port-channel/bonding), and DHCP. Setting up VLAN, isolated networks, firewall was an absolute breeze, and configuring everything was somehow a pleasant experience as opposed to any network gear I've worked with in the past.
Management and configuration is smooth and painless through either the GUI or via the CLI. The web interface may be the most straightforward way to set up all the basic functions. But personally I prefer to use CLI to do most of the configurations. The CLI of this switch is rather identical to that of enterprise Cisco devices (I have used previously in my limited experience). So those familiar with IOS will find it’s easier to manage the switch.
The noise level is somewhere in the middle when you compare it to other equipment in the 1U form factor. But different people may not share the same opinion. It depends on the occupants of the office/setting where this switch will be installed. As for the power supply, the S5850-48S6Q is primarily with default AC power supply, and we asked to add DC power and they are capable to provide it. I love that the power supply is built inside the frame on this unit.
Overall, these switches are no-brainer at this price point, and I am very pleased with them. The sturdy design and performance meets my expectation as they just offer everything I want and also a lot to experiment/learn. The seller is an excellent company and serviced many of the businesses I worked for in the past. I would definitely recommend this product and consider to buy more.

As a cloud service provider, we were about to build a data center in Switzerland to better serve our customers. We planned to expand the network storage: needed each of our racks to have 8 nodes with dual 10G SFP+, an IPMI port, and a management port. So there will be about 6PB of HDD storage and 1PB of SSD storage. Most of that storage will be addressable from the Internet. We’ve consulted FS sales and tech staff several times on the layout of our network. Got fast response and solid supports all the time. At last we decided to go with the spine-leaf topology. This exactly fits our needs but also gave us enough space for future growth. Now we have 2 S8050-20Q4C switches as spine switches to get reliable backbone transmission. 20 S5850-48S6Q are running as leaf switches to handle the traffic from access devices and are uplinking to the 2 S8050-20Q4C. We also use their S3900-48T4S as access switches that deliver 1Gbps to the servers. MLAG was used to increase the redundancy at the spine and leaf layer. My order was shipped in a timely manner and the sales.rep helped me track the package in the process. My switches came well-packed with foam mats inside and without any damage or scraping.
Now, we have been using the switches for nearly six months without a reboot. My overall experience with their switches has been very positive and I really appreciate them putting the data center level equipment in our hands so affordably. Hopefully this would help you pick the unit that fits your needs rightly.

I have bought several times from this supplier. I am a purchaser of a big company and purchase many times from many suppliers. FS is one of the best suppliers I can find. They never let me down. In the other hand, I suggest improving the searching function of the website more convenient and useful so that I can find the switches I want to buy at a glance.

Their service is really good. They will follow me all the way from pre-sale to after-sale and provide me with many kinds of purchase schemes according to my needs. I also don't worry about any quality problems of the product. The switch functions I needed can be included, such as MLAG, SFLOW and so on. I really enjoy every cooperation with FS company.

I purchased 2 units of S5850-48S6Q and 10 and very satisfied with performance and reliability of this switches. I also purchased 10 units of four port 10g NIC from here as well. All of our servers are now able to do 40 Gbps bi-directional. Its been running for 5 months without any problem.

I was looking for a switch to complement the two-tier network structure. MLAG is a must. Throughput is also a concern as well as the price. The sales rep recommended to try the S5850-48S6Q. And this, I am gonna tell you, is an extremely reliable switch with full 48 SFP+ port and 6 QSFP+ port. Received the switch on time and well packed. The throughput is adequate to handle 20 servers. I configured the MLAG via CLI commands with the instructions, haven’t tried the GUI. The switches go to the servers to do the business traffic. Also add a S3900-24T4S to do the business traffic management. Above the S5850-48S6Q are two 40G switches going directly to ISP. For now the structure looks solid and robust. The optics and cables all work fine. Great switch with plenty of settings and information of what each port is doing.

We are now using this switch for 10G services and it has been extremely reliable.

The port config is fantastic: with 48 10G ports and 6 40G ports, I will literally get 72 ports that capable of pushing 10G per sec when breaking out all the 40G ports. I can hook up more devices as need occurs. The 40G ports also get us prepared for potantial network growth.

We had encountered some minor difficulties though, since I had no idea how to configure QinQ and SVLAN, and how to add/remove VLAN tag on packets. Fortunately, FS team gave me a lot help. They even show me the exact page of the manual that have the configuration guide. It was a little late (due to the time zone difference) but I still appreciate the help.

We needed some data center switches for an urgently project. As our first vendor, FS.COM was always Surprising. Lots of switches were stocked in its US warehouse, we appreciated it. Since we had bought FS switches for several times, we placed an order with no hesitate. Now our project goes smoothly, thanks for your guys.