Configuration by subclass and subnet

Chris Buxton chris.p.buxton at
Fri Oct 19 16:03:27 UTC 2012

On Oct 17, 2012, at 7:37 PM, Joao E Pereira Jr wrote:

> Hi,
> My organization has only one DHCP server that provides configuration for 
> clients in all subnets and every subnet gateway is able to do dhcp relay. In 
> some subnets there are access points that look for a wireless switch 
> controller using the value of option 43 of reply packet. Currently it have two 
> controllers and I need to include option 43 only for the access points 
> assigning the value based on the subnet.
> Subclassing allow me to include option 43 only for the access points, but I 
> haven't found a way to assign the value based on subnet so far. I' ve tryed 
> conditional behavior as showed in dhcp-eval. All access points end up reaching 
> the same controller or got no option 43 at all. Is this scenario feasible? 
> Could you provide some guidance?

Is there a reason you are using option 43 rather than a vendor option space? Vendor options are compiled into option 43 but are only sent to devices sending the appropriate vendor ID.

Chris Buxton
BlueCat Networks

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