I have 140 MAC addresses that I need to find out not only what switch, and switch port they are on, but also which part of the floor. It is a time-consuming slog, especially since the MAC addresses are not in a standard format.
This site saved me.
If you have Excel handy:
Cell A1 your original MAC
Cell B1 =SUBSTITUTE(A1,”:”,””)
Cell C1 =MID(B1,1,4)&”:”&MID(B1,5,4)&”:”&MID(B1,9,4)
Put original MACs into column A, 1 per cell
Fill down column B and C
In my case,
D35 is original
001DA266FBE6 becomes useable 001D.A266.FBE6