> On Nov 5, 2019, at 12:39 PM, bln 77 <bln...@yahoo.de> wrote:
> 
> Hi everyone,
> 
> I have a 10.1.0.0/16 network.
> I want to have clients in the same network because I want to be able to 
> receive IP-broadcast for autodiscovery.
> I configured two VLANs and the router has an interface/ip in both:
> lan1: 10.1.1.0 with subnet mask 255.255.0.0
> lan2: 10.1.2.0 with subnet mask 255.255.0.0
> 
> Both interfaces are bridged together and I filter/firewall the traffic with 
> etables rules.
> I have a filter that blocks DHCP traffic from being bridged/forwarded.
> 
> Now I want to configure dnsmasq to offer the following ranges on the 
> interfaces so I can easily recognise in which net the client belongs:
> 
> dhcp-range=set:lan1,10.1.1.50,10.1.2.199,255.255.0.0,12h
> dhcp-range=set:lan2,10.1.2.50,10.1.3.199,255.255.0.0,12h
> 
> Unfortunately the clients on the second interface also getting an offer from 
> the 10.1.1.x range.
> 
> I think both ranges are active on both interfaces?
> 
> Is there any way to pin a range to an interface?
> 
> Any help is appreciated.

Alternatively, use isolated subnets with 255.255.255.0 masks, no bridge, and 
enable "avahi-daemon" to share the broadcasts you need between subnets.

Everything is now simple ... except possibly configuring "avahi-daemon". :-)

Lonnie


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