Is there a summary table of network equipment availability somewhere?

Question

Computer networks

Many people are familiar with the concept of "accessibility level". It is measured as

доступность (%) = время реальной работы/время работы * 100

Also, everyone knows that the equipment (and software) of some manufacturers has a lower value of this parameter.
So the question is - are there any pivot tables somewhere on the Internet that can be obtained experimentally, in which the value of the accessibility level is clearly indicated, and not just all sorts of marketing tricks like "high service availability", "highest access level" and etc. How many desired nines will DIR-300 give, and how many mikrotik 950, and how many 72nd tsiska?

Answer 1

are there any pivot tables somewhere on the Internet, maybe obtained experimentally, in which the value of the accessibility level is clearly indicated

I don't think. Even if they are, I don't see much point in them. In my opinion, it is more practical to talk about the level of accessibility not of a single device, but of the hardware and software system as a whole. This, of course, complicates the calculation of the metric, but it also takes into account many specific factors (quality of power supply, ventilation, interaction of technical services, etc.).
Regarding individual devices, sometimes in the datasheet they indicate the value of the mean time between failures (mean time between failure, MTBF). Example , table 2, last line.
You can give the following availability assessment:
Availability=100%*MTBF/(MTBF+MTTR),
where MTTR (mean time to restore) is the average time to bring a failed device back to working condition. But I repeat, I consider the assessment of the work of the entire system as a whole to be a more constructive approach.

Answer 2

And what will it give you?
A question of course in spam.