MikroTik CRS309-1G-8S+IN Switch
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Eight 10G SFP+ Slots : Features eight dedicated $10G$ SFP+ cages, allowing for massive aggregate bandwidth and high-speed fiber uplinks to servers, storage, or other switches.
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Dual Boot OS : Offers the flexibility to boot into SwOS for simple, fast switching, or RouterOS (Level 5) for advanced routing, firewalls, and complex networking features.
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Hardware L3 Offloading : Supports Layer 3 Hardware Offloading, allowing the switch to perform routing tasks at wire speed without taxing the main CPU.
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Silent Passive Cooling : Features a completely fanless design with a massive rear heat sink, ensuring 100% silent operation—perfect for office desks or home racks.
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Non-Blocking Throughput : Boasts a total non-blocking throughput of 81 Gbps and a switching capacity of 162 Gbps, ensuring zero performance degradation under full load.
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Redundant Powering : Supports dual power input via a DC jack and PoE-in (802.3af/at) on its management Ethernet port, ensuring the device stays online during power transitions.
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MikroTik CRS309-1G-8S+IN Switch
The MikroTik CRS309-1G-8S+IN Switch belongs to the Cloud Router Switch family, offering the unique “Dual Boot” capability that allows users to choose between the simplified SwOS or the feature-rich RouterOS. This switch is engineered to provide robust Layer 3 routing capabilities alongside high-speed Layer 2 switching, making it an incredible value for small-to-midsize data centers, professional home labs, and high-performance creative studios.
Key Features of the CRS309-1G-8S+IN:
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Eight 10G SFP+ Slots : Features eight dedicated $10G$ SFP+ cages, allowing for massive aggregate bandwidth and high-speed fiber uplinks to servers, storage, or other switches.
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Gigabit Ethernet Management : Includes one 10/100/1000 Mbps Ethernet port dedicated for management access or standard data connectivity.
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Dual Boot OS : Offers the flexibility to boot into SwOS for simple, fast switching, or RouterOS (Level 5) for advanced routing, firewalls, and complex networking features.
-
Hardware L3 Offloading : Supports Layer 3 Hardware Offloading, allowing the switch to perform routing tasks at wire speed without taxing the main CPU.
-
Silent Passive Cooling : Features a completely fanless design with a massive rear heat sink. This ensures 100% silent operation, making it perfect for office desks or home racks.
-
Non-Blocking Throughput : Boasts a total non-blocking throughput of 81 Gbps and a switching capacity of 162 Gbps, ensuring zero performance degradation under full load.
-
Redundant Powering : Supports dual power input via a DC jack and PoE-in (802.3af/at) on the Ethernet port, ensuring the device stays online during power source transitions.
Applications and Ideal Use Cases
The CRS309-1G-8S+IN is the go-to solution for cost-effectively modernizing the core of your network :
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High-Performance Storage (NAS) : The ideal hub for connecting multiple workstations to a high-speed $10G$ NAS unit for 4K video editing or large-scale backups.
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Home Lab Core Switch : A favorite for tech enthusiasts requiring a silent, low-power core switch capable of handling VLANs, routing, and high-speed server interconnects.
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Small Data Centers : Provides a dense 10GbE distribution layer in a small footprint, perfect for edge computing or localized server clusters.
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Enterprise Fiber Distribution : Can be used to distribute high-speed fiber connections to various floors or departments within a building silently and efficiently.
Technical Specifications at a Glance
| Feature | Specification |
| Total Ports | 8 x 10G SFP+ & 1 x Gigabit Ethernet |
| Switching Capacity | 162 Gbps |
| Forwarding Rate | 120.5 Mpps |
| Operating System | Dual Boot: RouterOS (L5) / SwOS |
| CPU | Dual-Core 800 MHz (98DX8208) |
| RAM | 512 MB |
| Cooling Type | Passive (Fanless) |
| Management | Managed Layer 2 & Layer 3 |
| Brand |
MikroTik |
|---|---|
| Product code |
CRS309-1G-8S+IN |
| Management Type |
Fully Managed (Layer 2) |
| Architecture |
ARM 32bit |
| CPU |
98DX8208 |
| CPU core count |
2 |
| CPU nominal frequency |
800 MHz |
| CPU Threads count |
2 |
| Switch chip model |
98DX8208 |
| Dimensions |
272 x 191 x 44 mm |
| RouterOS license |
5 |
| Operating System |
RouterOS / SwitchOS |
| Size of RAM |
512 MB |
| Storage size |
16 MB |
| Storage type |
FLASH |
| MTBF |
Approximately 200'000 hours at 25C |
| Tested ambient temperature |
-40°C to 70°C |
| Number of DC inputs |
2 (DC jack, PoE-IN) |
| DC jack input Voltage |
12-57 V |
| Max power consumption |
23 W |
| Max power consumption without attachments |
17 W |
| PoE in |
802.3af/at |
| Cooling type |
Passive |
| PoE Capability |
NoN PoE |
| PoE in input Voltage |
18-57 V |
| 10/100/1000 Ethernet ports |
1 |
| Port Count |
8 port |
| SFP+ ports |
8 |
| Serial console port |
RS232 |
| CPU temperature monitor |
Yes |
| Beeper |
Yes |
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