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White rectangular indoor network switch with multiple fiber module slots and one Ethernet port

Mikrotik

Mikrotik CRS310-1G-5S-4S+IN network switch

SKU CH-MQ78-FWHXN

Indoor switch with five 1G SFP, four 10G SFP+ and one Gigabit Ethernet port supporting PoE-in, ARM v7 CPU and 256 MB RAM

  • Product weight1.35
  • 10 Gigabit fibre links reach beyond 100 metres for offices and ISPs
  • Hardware-offloaded VLAN filtering and Layer-3 routing reduce CPU load
  • Five 1G SFP, four 10G SFP+ and one Gigabit Ethernet port upgrade CRS212 setups
  • ARM v7 CPU with 256 MB RAM and improved cooling boost performance
  • Gigabit Ethernet port connects directly to the switch chip and supports PoE-in

Indoor 10G fibre switch

The MikroTik CRS310-1G-5S-4S+IN is a new indoor switch that provides 10 gigabit fibre connectivity over distances exceeding 100 metres. It combines five 1G SFP ports, four 10G SFP+ ports and one Gigabit Ethernet port with an ARM v7 CPU and 256 MB of RAM.

Suited for extended indoor links

This switch suits small offices or ISPs that need low-latency fibre runs beyond the reach of copper cabling. It also serves as a direct upgrade path for existing CRS212 deployments. Buyers requiring copper 10GBASE-T interfaces or Power over Ethernet output for connected devices should consider other options.

Hardware-offloaded VLAN and Layer-3

The switch chip supports hardware-offloaded VLAN filtering and some hardware-offloaded Layer-3 routing, reducing CPU load for traffic segmentation and inter-VLAN routing. The Gigabit Ethernet port connects directly to the switch chip for full wire-speed throughput and accepts PoE-in for flexible power sourcing.

How it compares

Measured against everything we stock in Ethernet & PoE Switches, at today’s prices. Recalculated every night.

Price $209.99
Cheaper than about 66% of the 2,759 comparable items (median $482.99).

Specifications

Product
Brand nameMikroTik
Model nameCRS310-1G-5S-4S+IN

Questions about this item

How do I install the CRS310-1G-5S-4S+IN and what step is often missed?

Mount the switch indoors, insert SFP modules into the five 1G ports and four 10G ports, connect the Gigabit Ethernet port for management or PoE-in power, then configure VLAN filtering and Layer-3 routing in RouterOS — the step many skip is enabling hardware offload for those features in the switch chip settings.

What maintenance or replacement will the CRS310-1G-5S-4S+IN need later?

The fanless design has no moving parts to replace; plan to swap SFP or SFP+ transceivers if link speeds change, and apply RouterOS firmware updates for security and feature improvements.

What limit appears first on the CRS310-1G-5S-4S+IN under sustained load?

The ARM v7 CPU with 256 MB RAM handles hardware-offloaded switching at line rate, but sustained Layer-3 routing at 10 Gbps across all ports will hit the CPU throughput ceiling before the switch chip saturates.

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