If the network includes virtual routers, the count must include their interfaces in addition to the physical ports and interfaces. A virtual router is a software emulation of a router implemented within a physical router or switch.
Calculate the estimated number of managed ports and interfaces using the ratios of 90 percent managed for interfaces and 5 percent managed for ports:
| Estimated number of managed ports and interfaces |
= |
90 percent interfaces |
+ |
5 percent ports |
For example, if the network has 2,300 interfaces and 18,000 ports, then calculate the managed ports and interfaces as follows:
| Estimated number of managed ports and interfaces |
= |
90 percent interfaces |
+ |
5 percent ports |
| = |
((90/100) * 2,300) |
+ |
((5/100) * 18,000) |
|
| = |
2,070 |
+ |
900 |
|
| = |
2,970 |
All values that were less than one were rounded up in these calculations.
