Configuration by subclass and subnet

Simon Hobson dhcp1 at
Thu Oct 18 15:24:10 UTC 2012

Sten Carlsen wrote:

>Right, my question was also more generic, IF for some obscure reason 
>I decide it makes sense to have two classifications based on X and Y 
>, so I would have, say:
>classes X1, X2, X3, ...
>classes Y1, Y2, Y3, ...
>All devices belong to one of the Xn classes and to one of the Yn 
>classes. This could give me some freedom to use allow/deny to 
>allocate from pools, etc.
>I happen to put option Z in both class X3 and Y2 (my mistake or 
>something very convoluted) how would dhcp decide which option Z to 
>use? the one from X3 or the one from Y2?

It's undefined. There may be an implementation specific ordering, but 
relying on that would be "poor practice" to say the least.

Simon Hobson

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