Hager technical control center or server cabinet?

But have you ever transferred a single file of larger size from a to b? From my point of view, still the best benchmark. I can't believe that these switches drop to roughly 10mb when routing.

iperf is quite reliable in this regard and simulates an arbitrarily large file, which also does not have to be read from any potentially slow hard drive.

It's not about the switch fundamentally not being capable of Gbit/s, but depending on how the routing is set up and how many new or hosts are involved, this can no longer be handled by the switch chip in hardware - and then it becomes slow because each individual packet has to pass the bottleneck to the CPU twice: once there and once back. Additionally, the CPU is not suitable for high routing loads. The switch chip is actually designed for L2 forwarding and can only handle light routing in hardware with tricks.

Anything else would be strange, because then no one would buy "real" routers anymore.

As a concrete example:

My switch has a total of 28 ports, four of which are 10 Gbit/s. It can switch 64 Gbit/s in hardware and can also route in simple cases. However, in more complex routing, it only achieves a little over 1 Gbit/s. The router, on the other hand, can only switch 20 Gbit/s but in most cases can also route 10 Gbit/s, because the CPU is connected to the switch with 10 Gbit/s. You can definitely notice that, and it can also be proven with measurements.

What hardware are you running? I still think that an SG 300 in a small home network with correspondingly few connected devices is not overwhelmed even in L3 operation. I am talking about an average home network. Not everyone has such a large network at home as . So what do you have connected in your network?

Just as a concrete example:

My switch has a total of 28 ports, four of which are 10 Gbit/s. It can switch 64 Gbit/s in hardware and in simple cases also route. However, in more complex routings, it only achieves a bit over 1 Gbit/s. The router, on the other hand, can only switch 20 Gbit/s but in most cases can also route 10 Gbit/s, because the CPU is connected to the switch at 10 Gbit/s. You can notice that, and it can also be proven by measurement.

What exactly are more complex routings? Not a provocative question, but a genuinely serious one. In a single-family house, I only have (if at all) network a to b, network a to c, network a to d, maybe even network d to c to a.

In the home network, "complex" routing cases are clearly in the minority ;-) But usually, routing is not well placed in the switch anyway. You often want to separate networks to restrict access, etc., then the firewall also takes over the routing.

If you think about broadcast domains and complex routing in your own home network, it is probably more of an occupational disease, and you are better off with a "real" router^^