MikroTik CRS309-1G-8S+IN - 8 port 10G Layer 2 - $270

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Funny nobody mentioned this...

https://mikrotik.com/product/crs309_1g_8s_in

The CRS309-1G-8S+ is a very compact, yet powerful networking switch. It has eight SFP+ slots, supporting up to 10 Gbit module in each, which results in a total switching capacity of 162 Gbps and total non-blocking throughput of 81 Gbps.

The device also has dual-core 800 MHz CPU, 512 MB RAM, a management Ethernet port with PoE power input, RS232 serial port, a grounding terminal and is capable of dual boot (choose which operating system you prefer, RouterOS, or SwOS).​

Quick overview here...

https://www.servethehome.com/mikrotik-crs309-1g-8sin-overview-and-unboxing/

 

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It is even passively cooled, can double as a router and has similar max power consumption to the latest Ubiquiti Edgerouter (ER-12).

 

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It is even passively cooled, can double as a router and has similar max power consumption to the latest Ubiquiti Edgerouter (ER-12).

With some of the forum members hard for 10G, something is missing...

The price per port on these devices makes it really interesting...