Query: How does dnsmasq associate the interface with the dhcp-range?

I do not detect an explicit connection, i.e. tags shared between config entries. I assume the implicit association is that the IP address assigned to the interface outside of dnsmasq, e.g. ifconfig, needs to be within the address range within dhcp-range assigned within dnsmasq. (and dnsmasq marks the interfaces IP address as used). What happens to the dhcp-range that does not include one of the interfaces ip addresses?

Fred

On 11/30/2010 11:50 AM, /dev/rob0 wrote:
On Tue, Nov 30, 2010 at 05:12:40PM +0100, Markus Bergholz wrote:
i want
dhcp-range=192.168.1.2,192.168.1.1,255.255.255.0,12h
for both. but everytime i try to bridge, the hole network on server
side don't work anymore.
so i want to try without bridge.

Fine, just use separate netblocks for each physical segment. No need
for bridging.

could
interface=eth0
dhcp-range=192.168.1.2,192.168.1.1,255.255.0.0,12h
interface=wlan0
dhcp-range=192.168.2.2,192.168.2.1,255.255.0.0,12h
work?

You have the end-addr argument numerically less than the start-addr.
This is supposed to be a RANGE of addresses. Also, you have set each
in a /16 (255.255.0.0 netmask), so those netblocks are overlapping.

You might need to read up a bit on IP networking basics: addresses,
netmasks/CIDR and subnetting. This might work for what you want:

# eth0 being 192.168.4.1/24
interface=eth0
dhcp-range=192.168.4.128,192.168.4.191,255.255.255.0,12h
# wlan0 being 192.168.5.1/24
interface=wlan0
dhcp-range=192.168.5.64,192.168.5.127,255.255.255.0,12h

In that example I use addresses on subnetting boundaries rather than
decimal numbering boundaries. The eth0 range could be described in
CIDR terms as 192.168.4.128/26, and wlan0 range is 192.168.5.64/26.
For NAT purposes, 192.168.4.0/23 covers them both.

Reply via email to