[Dnsmasq-discuss] DHCP - multiple ranges on the same interface

[Simon Kelley]

Mark Wiater wrote:
> Hello,
> 
> I'm hoping you can help guide me in the right direction with this.
> 
> I've got a situation where i need to use the dhcp-vendorclass option...
> 
> I want to reserve a small block of addresses for those hosts who present
> a specific vendor id, all others get an address out of the pool without
> an associated network id.
> 
> This is the relevant configuration:
> 
> dhcp-range=test,172.16.1.4,172.16.1.15,1h
> 
> dhcp-range=172.16.1.32,172.16.1.199,12h
> dhcp-vendorclass=test,vendor.class.identifier
> dhcp-option=test,176,opt1=10.0.0.50,opt2=1719,opt3=10.0.0.49
> dhcp-option=7,172.16.1.1
> 
> 

For the record, this is possible from version 2.20 on. That release adds 
a new feature; if the network-id tag in a dhcp-range option is preceeded 
by "net:" then it is used to filter that range rather than being added 
to the list of network ids.

So

dhcp-vendorclass=test,vendor.class.identifier
dhcp-range=net:test,172.16.1.4,172.16.1.15,1h
dhcp-range=172.16.1.32,172.16.1.199,12h

Will set the "test" tag only when the vendor class matches, and in that 
case will use the 172.16.1.4,172.16.1.15 range. All other requests will 
ignore the 172.16.1.4,172.16.1.15 and use only the 
172.16.1.32,172.16.1.199 range.


Simon.