Hi,

I work in an educational institution which currently has a p2p network with static addressing.

IP 192.168.11.0- 192.168.11.255
subnet: 255.255.255.0

We have a mixture of a wired and wireless networks connected to a gateway

gateway 192.168.11.250

We want to move to a DHCP system using linux.

I am a newbie with networking and I have broadly outlined the steps to do it

1. Have a DHCP server with the following configuration

# A slightly different configuration for an internal subnet.
subnet 192.168.10.0 netmask 255.255.254.0 {
range 192.168.10.3 192.168.10.250;
option domain-name-servers 202.54.1.30, 202.54.9.1;
option domain-name "mail.iiswbm.edu";
option routers 192.168.11.250;
option broadcast-address 192.168.11.255;
default-lease-time 600;
max-lease-time 7200;

2. Change the subnet masks of all devices to 255.255.254.0

3. Keep Static IPs for all routers.

Pls tell me if iam right or missing something
thanks and regards
vijay

You might need to add ddns-update-style to the top of your dhcpd.conf

This is and old dhcpd.conf of mine:

ddns-update-style interim;
subnet 192.168.0.0 netmask 255.255.255.0 {
option routers 192.168.0.1;
option subnet-mask 255.255.255.0;
option domain-name "daemon.sh";
option domain-name-servers 203.220.6.130, 139.130.4.4;
range 192.168.0.4 192.168.0.200;
}

wouldnt the domain be just iiswbm.edu ? Im assuming mail is the mail server??

Do you want dhcpd to do this? if not just assign the routers a static IP and change the range to not assign the addresses you give the routers. Or you can configure dhcpd to assign ip's based on MAC addresses i think - been a while since i used dhcp.