--- product_id: 111287967 title: "CRS309-1G-8S+IN Switch" brand: "mikrotik" price: "£278.17" currency: GBP in_stock: true reviews_count: 7 category: "Mikro Tik" url: https://www.desertcart.co.uk/products/111287967-crs309-1g-8s-in-switch store_origin: GB region: United Kingdom --- # 8x 10Gbps SFP+ ports 81 Gbps non-blocking throughput Passively cooled, silent operation CRS309-1G-8S+IN Switch **Brand:** mikrotik **Price:** £278.17 **Availability:** ✅ In Stock ## Summary > ⚡ Elevate your network game with silent, lightning-fast 10GbE power! ## Quick Answers - **What is this?** CRS309-1G-8S+IN Switch by mikrotik - **How much does it cost?** £278.17 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/111287967-crs309-1g-8s-in-switch) ## Best For - mikrotik enthusiasts ## Why This Product - Trusted mikrotik brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **PoE-Powered Convenience:** Supports Power over Ethernet to simplify deployment and reduce cable clutter. - • **Whisper-Quiet Performance:** Passive cooling means zero fan noise—perfect for noise-sensitive professional environments. - • **Blazing 10GbE Connectivity:** Eight SFP+ ports deliver ultra-fast 10Gbps speeds for seamless data flow and future-proof networking. - • **Massive Switching Capacity:** Handles up to 81 Gbps non-blocking throughput, ensuring lag-free multi-device performance. - • **Flexible Management Options:** Manage via RouterOS or SwitchOS with SSH, Winbox, or web interface for tailored control. ## Overview The MikroTik CRS309-1G-8S+IN is a high-performance, managed Layer 2 switch featuring eight 10Gbps SFP+ ports and one Gigabit RJ45 port. Its passively cooled metal chassis ensures silent operation, while delivering an impressive 81 Gbps non-blocking throughput. Designed for professionals who demand robust, flexible network management, it supports RouterOS and SwitchOS with multiple management interfaces. PoE support adds deployment versatility, making it an unbeatable value for advanced networking setups requiring speed, silence, and scalability. ## Description CRS309-1G-8S+IN Review: Amazing value 10GbE Switch - Update 23/04/2021: I'm still incredibly happy with my CRS309-1G-8S+IN, so much in fact that I bought another one to play around with and use as a spare. I have just been experimenting with RouterOS 7.1 beta 5 which now supports Hardware Offloaded Layer 3 for CRS3xxx devices! From my limited testing of Inter-VLAN routing with this firmware I'm able to achieve near wire-speed routing between VLANs using the CRS309 as a router. This is very impressive and I am seeing 10Gbps throughput between VLANs with the CPU barely changing from idle. Prior to this I would get a maximum of 3.2Gbps with one CPU core pegged at 50%. This means the hardware in the CRS309 is far more capable than RouterOS currently supports at the moment and, whilst the beta is very unstable and not really suitable for any kind of production use, it does demonstrate that in the very near future the CRS309 is going to be a powerful router too. Original Review: This is an incredibly good value 10GbE switch which is hard to beat at the moment. What makes this switch a no-brainer for me is that it's passively cooled and therefore it is silent in operation. It does get a little warm when under load but that's a small price to pay for silence! Despite being branded as a 'Cloud Router Switch' the CRS309-1G-8S+IN is a Layer 2 Switch and not a Router. It can run RouterOS so it can be used for routing and other layer 3 functionality but the 800MHz 32bit ARM CPU in the device simply isn't powerful enough and you will take a significant performance hit (by significant we're talking maybe a max of 2.5 Gbps throughput). That aside, the CRS309 is a very good layer 2 switch and essentially is able to offer full non-blocking throughput of 81 Gbps. I'm not actually able to verify that claim but I can easily max out out multiple 10GbE ports at a time with no issues at all. The switch has 8 SFP+ ports which seem to be highly compatible with a number of transceivers. I'm using 10GTek fiber transceivers in a few ports with no issues. I'm also using Mikrotik S+RJ10 transceivers for RJ45 connections because I've found other transceivers don't negotiate 2.5 GbE or 5.0 GbE properly on this switch and the Mikrotik modules have DDM built-in to monitor the temperature etc. which is really useful. You can run SwitchOS or RouterOS on the CRS309-1G-8S+IN. SwitchOS is a simpler interface and only exposes Layer 2 switch functionality, however it can only be managed via the web browser which isn't ideal. I'm using RouterOS because I am more familiar with that and I can use Winbox and SSH to manage it in a way that I prefer. There is a risk with RouterOS in that you can inadvertently turn on features that disable hardware offloading of the switch ports and fallback to the CPU but if you strictly use Layer 2 features this shouldn't be an issue. The lights are bright on this switch and blue power LED is like looking at the sun! You can turn pretty much all of the LEDs off, apart from the lights on the single RJ45 on the right hand-side of the front. This port is suggested to be used for management traffic but I was happily using it as an uplink with multiple VLANs at one point. If you don't use this port then the LEDs do not light up. A couple of users seemed to have massive trouble getting this device to work properly without it 'taking over' their network. Mine came preinstalled with RouterOS and also had a DHCP server enabled which means it probably would have interfered with my existing LAN. One thing you come to learn about MikroTik kit is that it nearly always comes with static IP Address of 192.168.88.1 configured as its default, so you need to connect to it standalone/directly and configure the device in a basic way before plugging it into your network. This alone means this device is not plug and play and requires some degree of networking knowledge to configure. This switch uses MikroTik's newer bridge method. In the most basic sense you add all of your ports to a bridge and they should be able to switch with each other with hardware offloading enabled. If you want to add VLANs, you need to add these to the bridge too and more importantly, you'll need to turn on VLAN filtering on the bridge, which is disabled by default. The tagging of VLANs is unlike any other brand I've used before but you essentially tag and un-tag the ports (and the bridge itself) in the Bridge > VLAN section. You should try to make sure that your routing is performed by another device on your network otherwise performance will suffer badly. I've found that not adding IP Addresses to my VLANs on this switch reduces the chance of me inadvertently falling back to CPU based switching. Overall it's a brilliant switch and offers incredible value for money. Whilst there is a steep learning curve at the start and it's definitely not plug and play, it's not really difficult to manage the switching config afterwards. I think you'll be hard pushed to find a similar feature-rich product in this price range. Pros: - Amazing value for money - Passively cooled (silent) - Excellent Layer 2 throughput (162 Gbps switching capacity/81 Gbps non-blocking throughput) - Compatible with lots of transceivers - Manageable with multiple means i.e. SSH, Winbox, WebFig - Can also be powered via PoE on the Ethernet port - Console port Cons: - Not plug and play and requires some networking knowledge to configure it - Layer 3 functionality has massive performance impact - No Console cable supplied Review: The best 10G switch deal on desertcart. - Great price, fast delivery, working great. Came with a UK power adapter. I'm just using it for L2 to get the best throughput and very pleased. Although the SFPs can be expensive, you can get SFP+/DAC cables for less than the cost of one SFP. I would recommend trying to avoid using SFP/RJ45 transceivers as they more power and can get very hot. ## Features - Mikrotik CRS309-1G-8S+ Managed Gigabit Ethernet (10/100/1000) White Power over Ethernet (PoE) - 2000001052891 - CRS309-1G-8S+IN - Network Management Devices ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07NFXN4SS | | Best Sellers Rank | 17,737 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 118 in Network Switches | | Box Contents | Power adapter 24 V 1.2 A, Rack ears, Screw kit | | Brand | MikroTik | | Brand Name | MikroTik | | Case Material Type | Metal | | Color | White | | Colour | White | | Compatible Devices | Desktop | | Compatible devices | Desktop | | Country of Origin | Latvia | | Customer Reviews | 4.6 out of 5 stars 350 Reviews | | Data Transfer Rate | 1000 Megabits Per Second | | Included components | Power adapter 24 V 1.2 A, Rack ears, Screw kit | | Interface | RJ45 | | Item Dimensions L x W x H | 14.1L x 11.5W x 2.8H centimetres | | Item Weight | 499 g | | Item height | 1.1 inches | | Manufacturer | MIKROTIK | | Number of Layers | 1 | | Number of Ports | 9 | | Number of ports | 9 | | Product Warranty | 1 year | | Product dimensions | 14.1L x 11.5W x 2.8H centimetres | | Switch Type | managed | | Upper Temperature Rating | 40 Degrees Celsius | | Voltage | 12 Volts | ## Product Details - **Brand:** MikroTik - **Number of ports:** 9 - **Included components:** Power adapter 24 V 1.2 A, Rack ears, Screw kit - **Colour:** White - **Compatible devices:** Desktop ## Images ![CRS309-1G-8S+IN Switch - Image 1](https://m.media-amazon.com/images/I/61ji+JdFA8L.jpg) ## Questions & Answers **Q: What power supply plug comes with it? I see one of the reviews mentions it is not a UK plug.** A: Will depend entirely on the seller you buy from. I bought from GETIC and mine came with UK plug. **Q: is it switch os or outer os & what version is supplied with it.** A: I don't recall what versions are on the unit from factory, but they can be upgraded from the device if it has a connection to the Internet. In respect SwitchOS/RouterOS; this device is dual-boot so has both. Will be RouterOS from factory. **Q: Does this come with the bracket to rackmount it, or is it sold separately?** A: Brackets are already included in package. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Amazing value 10GbE Switch *by T***Y on 13 June 2020* Update 23/04/2021: I'm still incredibly happy with my CRS309-1G-8S+IN, so much in fact that I bought another one to play around with and use as a spare. I have just been experimenting with RouterOS 7.1 beta 5 which now supports Hardware Offloaded Layer 3 for CRS3xxx devices! From my limited testing of Inter-VLAN routing with this firmware I'm able to achieve near wire-speed routing between VLANs using the CRS309 as a router. This is very impressive and I am seeing 10Gbps throughput between VLANs with the CPU barely changing from idle. Prior to this I would get a maximum of 3.2Gbps with one CPU core pegged at 50%. This means the hardware in the CRS309 is far more capable than RouterOS currently supports at the moment and, whilst the beta is very unstable and not really suitable for any kind of production use, it does demonstrate that in the very near future the CRS309 is going to be a powerful router too. Original Review: This is an incredibly good value 10GbE switch which is hard to beat at the moment. What makes this switch a no-brainer for me is that it's passively cooled and therefore it is silent in operation. It does get a little warm when under load but that's a small price to pay for silence! Despite being branded as a 'Cloud Router Switch' the CRS309-1G-8S+IN is a Layer 2 Switch and not a Router. It can run RouterOS so it can be used for routing and other layer 3 functionality but the 800MHz 32bit ARM CPU in the device simply isn't powerful enough and you will take a significant performance hit (by significant we're talking maybe a max of 2.5 Gbps throughput). That aside, the CRS309 is a very good layer 2 switch and essentially is able to offer full non-blocking throughput of 81 Gbps. I'm not actually able to verify that claim but I can easily max out out multiple 10GbE ports at a time with no issues at all. The switch has 8 SFP+ ports which seem to be highly compatible with a number of transceivers. I'm using 10GTek fiber transceivers in a few ports with no issues. I'm also using Mikrotik S+RJ10 transceivers for RJ45 connections because I've found other transceivers don't negotiate 2.5 GbE or 5.0 GbE properly on this switch and the Mikrotik modules have DDM built-in to monitor the temperature etc. which is really useful. You can run SwitchOS or RouterOS on the CRS309-1G-8S+IN. SwitchOS is a simpler interface and only exposes Layer 2 switch functionality, however it can only be managed via the web browser which isn't ideal. I'm using RouterOS because I am more familiar with that and I can use Winbox and SSH to manage it in a way that I prefer. There is a risk with RouterOS in that you can inadvertently turn on features that disable hardware offloading of the switch ports and fallback to the CPU but if you strictly use Layer 2 features this shouldn't be an issue. The lights are bright on this switch and blue power LED is like looking at the sun! You can turn pretty much all of the LEDs off, apart from the lights on the single RJ45 on the right hand-side of the front. This port is suggested to be used for management traffic but I was happily using it as an uplink with multiple VLANs at one point. If you don't use this port then the LEDs do not light up. A couple of users seemed to have massive trouble getting this device to work properly without it 'taking over' their network. Mine came preinstalled with RouterOS and also had a DHCP server enabled which means it probably would have interfered with my existing LAN. One thing you come to learn about MikroTik kit is that it nearly always comes with static IP Address of 192.168.88.1 configured as its default, so you need to connect to it standalone/directly and configure the device in a basic way before plugging it into your network. This alone means this device is not plug and play and requires some degree of networking knowledge to configure. This switch uses MikroTik's newer bridge method. In the most basic sense you add all of your ports to a bridge and they should be able to switch with each other with hardware offloading enabled. If you want to add VLANs, you need to add these to the bridge too and more importantly, you'll need to turn on VLAN filtering on the bridge, which is disabled by default. The tagging of VLANs is unlike any other brand I've used before but you essentially tag and un-tag the ports (and the bridge itself) in the Bridge > VLAN section. You should try to make sure that your routing is performed by another device on your network otherwise performance will suffer badly. I've found that not adding IP Addresses to my VLANs on this switch reduces the chance of me inadvertently falling back to CPU based switching. Overall it's a brilliant switch and offers incredible value for money. Whilst there is a steep learning curve at the start and it's definitely not plug and play, it's not really difficult to manage the switching config afterwards. I think you'll be hard pushed to find a similar feature-rich product in this price range. Pros: - Amazing value for money - Passively cooled (silent) - Excellent Layer 2 throughput (162 Gbps switching capacity/81 Gbps non-blocking throughput) - Compatible with lots of transceivers - Manageable with multiple means i.e. SSH, Winbox, WebFig - Can also be powered via PoE on the Ethernet port - Console port Cons: - Not plug and play and requires some networking knowledge to configure it - Layer 3 functionality has massive performance impact - No Console cable supplied ### ⭐⭐⭐⭐⭐ The best 10G switch deal on Amazon. *by D***J on 19 April 2025* Great price, fast delivery, working great. Came with a UK power adapter. I'm just using it for L2 to get the best throughput and very pleased. Although the SFPs can be expensive, you can get SFP+/DAC cables for less than the cost of one SFP. I would recommend trying to avoid using SFP/RJ45 transceivers as they more power and can get very hot. ### ⭐⭐⭐⭐⭐ A snap to set up *by S***R on 23 August 2019* Took me all of 10 minutes to get set up to a point where I could see it on the network and passing traffic. 1) download WinBox from the Mikrotik website. 2) connect an RJ45 patch cable between the device and the Ethernet port of the PC that you downloaded the Winbox app onto. 3) populate the "Connect To:" dialogue box in the WinBox app with the E09 MAC address of the port (On the label affixed to base of the device) 4) Hit "Connect" and you are in. Set the IP address of the device and the gateway. That's all I did to get mine on my network. You can then log into the device from the IP address you gave it and configure it to your hearts content. "Art of Server" has uploaded some really good video's on Youtube on the device which prepped me for its arrival. ## Frequently Bought Together - MikroTik CRS309-1G-8S+in - 10Gtek 10Gb PCI-E NIC Network Card, Single SFP+ Port, with Intel 82599EN Controller, Ethernet LAN Adapter Support Windows Server/Linux/VMware, Compare to Intel X520-DA1(E10G42BTDA) - 10Gtek SFP+ DAC Twinax Cable - 10GBASE-CU Passive Direct Attach Copper SFP Cable for Cisco SFP-H10GB-CU2M, Ubiquiti UniFi UC-DAC-SFP+, Meraki, Fortinet, D-Link, 2-Meter(6.6ft) | 0.25-12m Optional --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/111287967-crs309-1g-8s-in-switch](https://www.desertcart.co.uk/products/111287967-crs309-1g-8s-in-switch) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-04*