Rather than giving a man a fish, maybe it's better to teach a man to fish:

Suppose we don't know if the qf gives the quantiles measured from the left or right tail, and we can't figure it out from the documentation. One test we might use is to call the function over a range of probability values and see if the quantiles returned are increasing or decreasing.

#Call outputs of the function qf
PROBS <- seq(from = 0, to = 1, by = 0.05)
qf(PROBS, df1 = 4, df2 = 6)

[1] 0.0000000 0.1622552 0.2493921 0.3278960 0.4043197 0.4815638 0.5615268 0.6458107
[9] 0.7360243 0.8339843 0.9419133 1.0626959 1.2002700 1.3602830 1.5512907 1.7871545
[17] 2.0924149 2.5164101 3.1807629 4.5336770       Inf

Looking at the output, we see that the quantiles are increasing with respect to the probability values, which tells us that the quantile outputs are with respect to the lower tail area. Sure enough, if we read the documentation for the qf function we see that there is a logical parameter lower.tail that controls this. To round out our checks, let's look at the output when we change the default value of this parameter:

#Call outputs of the function qf with lower.tail = FALSE
qf(PROBS, df1 = 4, df2 = 6, lower.tail = FALSE)

[1]       Inf 4.5336770 3.1807629 2.5164101 2.0924149 1.7871545 1.5512907 1.3602830
[9] 1.2002700 1.0626959 0.9419133 0.8339843 0.7360243 0.6458107 0.5615268 0.4815638
[17] 0.4043197 0.3278960 0.2493921 0.1622552 0.0000000

Now we see that the quantiles are decreasing with respect to the probability values, which tells us that the quantile outputs are now with respect to the upper tail area.

Yeah you can't put them in 1g mode. But you can put SFP-T transceivers in the other switch and then use copper if the distance is not too long

Is it possible to try something like this. Add two units under physical interface, unit 2450 and 2451. Then do push pop under each unit for whichever vlans you need.