For testing, we use the following configuration stand:
To eliminate the OS impact, a network port as a PCI-E device was pushed into the guest virtual machine. In the same tests, traffic was started through the switch and directly connecting the Board ports. The Intel X520-DA2 used a 3-meter-long DAC cable. With a minimum packet size of 512 bytes, we will see how the built-in switch buffer speeds up network traffic for a long stream load. Note that contrary to popular belief, here the twisted pair gives higher traffic than the DAC.
Now let’s look at the same thing, but with a large package of 9 Kilobytes, typical for file networks.
Let’s look at the delay that the presence of the switch makes in the transmission of network packets, for which we will use the psping utility from the PsTools package from Microsoft.
On average, the delay does not increase, and the maximum-even decreases. But the minimum delay in the presence of a switch grows by a negligible 0.01 MS.
Recommendations for ordering
Please note that the Zyxel XS1920-12 model does not support the Nebula cloud service for remote device management over the Internet. This means that there will be no metrics and no binding to other people’s services in your infrastructure. If you are selecting a switch for installation in a room where people work, you can not be afraid of high noise of the switch: automatic adjustment of the fans maintains a low noise level.
I want to note that the device does not support intermediate speeds of 2.5 Gbit / s and 5 Gbit / s, which, contrary to my forecasts, suddenly rose from the ashes and now began to appear in personal computers and cheap NAS-es. Keep this in mind if you are going to purchase new workstations. Also, if you decide to expand your network, please note that stacking is not provided here.
If we consider the pricing policy of Zyxel, the xs1920-12 switch does not stand out in any particular way: this device is “in the market”, it is on a par with the 14 - and 16-port models of HPE and D-Link. Traditionally high component base, extended temperature range, and as a result - full compatibility with cables and network adapters - these are the strengths of this model.