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Old 13th July 2013
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jggimi jggimi is offline
More noise than signal
 
Join Date: May 2008
Location: USA
Posts: 6,221
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Testing, it seemed to be easy, just worked, and did not require any 802.1Q VLAN configurations at all.

The router just needs aliases assigned for each extra subnet, such as 10.1.1.1/30, 10.1.1.5/30, 10.1.1.9/30... and so on. The dhcpd.conf needs the network address of each subnet. Here, for example, is the configuration for a network with two /30s:

10.1.1.0, with the router at 10.1.1.1 and the device at 10.1.1.2, broadcast at 10.1.1.3.

10.1.1.4, with the router at 10.1.1.5 and the device at 10.1.1.6, broadcast at 10.1.1.7.
Code:
shared-network LAN {
    subnet 10.1.1.0 netmask 255.255.255.252 {
        option routers 10.1.1.1;

        host one {
            hardware ethernet 00:00:00:00:00:01;
            fixed-address 10.1.1.2;
        }
    }

    subnet 10.1.1.4 netmask 255.255.255.252 {
        option routers 10.1.1.5;

        host two {
            hardware ethernet 00:00:00:00:00:02;
            fixed-address 10.1.1.6;
        }
    }
}
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