Google is your friend

Hello,

voici ce que me donne google pour "dhcpd.conf multiple subnet"
=> http://www.unix.com/unix-dummies-questions-answers/8622-dhcp(...)

Il faut donc que tu "encapsules" tes déclarations de subnet dans un bloc shared-network Inside{}

shared-network Inside {
subnet 192.168.1.0 netmask 255.255.255.0 {
option routers 192.168.1.1
option subnet-mask 255.255.255.0;
option domain-name-servers 192.168.1.1;
range 192.168.1.50 192.168.1.100
default-lease-time 3600;
max-lease-time 7200;
}

subnet 192.168.2.0 netmask 255.255.255.0 {
option routers 192.168.2.1
option subnet-mask 255.255.255.0;
option domain-name-servers 192.168.2.1;
range 192.168.2.50 192.168.2.100
default-lease-time 3600;
max-lease-time 7200;
}
}