[Dnsmasq-discuss] Serving Addresses on Multiple Subnets

Simon Kelley simon at thekelleys.org.uk
Thu Feb 7 16:28:29 GMT 2013


On 07/02/13 16:17, John Stowers wrote:
> 
> 
>     It's not.
> 
>     >
>     > Do I still need to run a dhcp-relay?
> 
>     No, just an address for each of your camera networks to eth1 on the
>     Debian box.
> 
> 
> Sorry, I'm not clear what you mean here.
> 
> Do you mean eth1 in on the debian box should have multiple IP addresses

I mean exactly that.
> defined in /etc/network/interfaces?
>  Is this possible?

/etc/network/interfaces wasn't too good at doing this, last time I
looked, even though the kernel considers it perfectly normal.

The trick to do it is to use "up" lines for the second and subsequent
addresses, so:

iface eth1 inet static
	address 192.168.1.1
	netmask 255.255.255.0
        network 192.168.1.0
        broadcast 192.168.1.255
	up ip addr add 192.168.21.2/24 dev eth1
	up ip addr add 192.168.22.2/24 dev eth1

etc

Cheers,

Simon.


> 
> Thanks,
> 
> John
> 
> 
> 
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