MikroTik CRS305-1G-4S+IN Cloud Router Switch
The CRS305-1G-4S+IN is a compact, powerful cloud router switch with a 1 Gigabit ethernet port for management, four SFP+ ports for 10 Gbit speeds, and the option to switch between RouterOS and SwOS operating systems.
Tech Specs
Click here for the CRS305-1G-4S+IN datasheet.
| Device Specifications | |
|---|---|
| Specifications | |
| Product code | CRS305-1G-4S+IN |
| Architecture | ARM 32bit |
| CPU | 98DX3236 |
| CPU core count | 2 |
| CPU nominal frequency | 800 MHz |
| Switch chip model | 98DX3236 |
| Dimensions | 141 x 115 x 28 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 |
| Suggested price | $149.00 |
| Powering | |
| Number of DC inputs | 3 (DC jack, PoE-IN) |
| DC jack input Voltage | 12-57 V |
| Max power consumption | 18 W |
| Max power consumption without attachments | 10 W |
| PoE in | 802.3af/at |
| Cooling type | Passive |
| PoE in input Voltage | 12-57 V |
| Ethernet | |
| 10/100/1000 Ethernet ports | 1 |
| Fiber | |
| SFP+ ports | 4 |
| Other | |
| CPU temperature monitor | Yes |
| Certification & Approvals | |
| Certification | CE, EAC, ROHS |
| IP | IP20 |
FAQs
Q: What is the MikroTik CRS305‑1G‑4S+IN used for?
A: This device is ideal for compact 10 Gb fiber uplink switching. It’s a 4‑port SFP+ switch with a management Gigabit port, suitable for server aggregation, labs, or edge network nodes.
Q: What are the key port and connectivity specifications?
A: The CRS305‑1G‑4S+IN offers 4 × SFP+ 10 Gb cages plus 1 × 1 Gb RJ45 port. This gives you high‑speed fiber connectivity along with a copper port for management or lower‑speed links.
Q: How is this switch powered, and what are its power options?
A: It supports PoE‑in (802.3af/at) and DC jack input (12–57 V). There are two DC jacks for redundancy, enabling reliable operation even in edge or DC-powered setups.
Q: What operating systems and features are supported?
A: It supports dual-boot between RouterOS (for advanced routing + L3 functions) and SwOS (a simplified Layer-2 switch OS). It includes features like VLANs, switching, ACLs, and port monitoring.
Q: What are its performance, physical design and environmental capabilities?
A: The switch offers non‑blocking throughput of ~41 Gbps, a switching capacity of ~82 Gbps, forward rate of ~61 Mpps, in a fanless metal case. It is rated to operate from –40 °C to +70 °C.