Assigning options within a class

[Norman Elton]

I'm trying assign specific options to MAC addresses from a given
vendor. My first attempt has been unpredictable:

http://pastie.caboo.se/178536

I've got two subnets, each with two variations on the "controller"
option. It appears that clients in one subnet are getting the values
assigned in another subnet, if this makes any sense.

Surely there is a "correct" way of doing this. Any ideas?

Thanks,

Norman Elton