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InfluxDB
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I can assure you that's entirely plausible. There are many big vendors like this, with a rather smaller set of vendors that sell switch chips for them. High end network switches are effectively a commodity now, and often are not much more than a board built around a single chip/chipset, which does everything.
As for software, there are many vendors and open source projects that make complete distributions for these generic switches/chipsets.
One way to get an idea of the sheer number of devices in play here is to look at the hardware supported by ONIE, a small Linux distribution that is a de facto standard bootloader for these. Can't find a proper HCL for ONIE, but have a look at the source: https://github.com/opencomputeproject/onie/tree/master/machi...