Okay, guys, don't be scared. I go away and I come back. And there's a scary looking formula on the on the board. It's not hard, and I will simplify this for you.
So, yes, J. R. P uses feasible distance
as this metric and what is feasible distance to find out. Well feasible distance is defined as
well defined in this formula. So K one into bandwidth
and I would swim. What K is
plaice skate you into band with over 2 56 minus the load on the link
or the current traffic on the link
plus K three into delay The delay of the link? The delay a packet will incur while transporting that link
multiplied by care five
divided by care for into reliability, that reliability of the link being how many times in the past hour sold this ring cast failed and come back up
mount of the whole thing multiplied or scaled up two by 2 56
the band with for AARP is actually tend to the power seven,
divided by the Louis bandwidth between your current position and the destination between the source and the destination.
The AARP delay is defined as the sum of all delays between source and destination in units off tens off microseconds, though, this little U stands for microbe.
So whatever the total delays, we will simply divided by 10 because it has to be in units of tens of microseconds
by default. These K values
K one and K three are one and kid 24 and five are set to defy zero by default.
If Kay 50 then you ignore this half of the formula, which is weird. It doesn't work like that in mathematics, but it's discourse for a call. Cisco's rules.
So if K 50 you ignored this half of the formula,
kid values range between zero and 255
Now what exactly is a K value?
Here is nothing but a weight. It's a *** that you can turn so by default. Okay, one and K three are one, and everything else is set to zero.
When if I wanted Ta Joppy to also consider the load of the link
while making its calculations to find which the best route is with the Louis feasible distance, then I might want to increase
the K to value from zero to maybe five. I wanted to consider the load on the link a little bit more than bandwidth, or I wanted it to consider the loan on the link. Ah, lot more than band with. I can set this to
255 K to allude to 255
What if I want a job for you to consider only the delay of the link and not the band with? Well, I can set k 1 to 0 all of the K values to zero, and I can set K three, which is multiplied by delay to a high number or just one.
If I want your Joppy to only consider bandwith while making his calculation, I can set all other K values to zero, and I can just set k one to the number one or a higher value.
Now, as I said, T one and K three are won by default and every other K value is zero. Let's see what happens to our formula
once we set the K values
it's okay to four and five are zero.
care to a 00 into something a zero so this goes to zero
Okay, this whole portion goes to zero. If k 50 we ignore this side of the formula. So the formula produces down to K. One is one.
Anyone? Anything multiplied by one is the same number.
que trees one anything multiplied by one again is one
delay whole thing multiplied by
2 56 The fish feasible distance formula reduces down to bandwidth plus delay if default values are being used
multiplied by 2 56 scaled up by 2 56
This concludes the metric portion or the feasibility feasible distance portion of the lecture.