Hi,

We have dhcp sever configured for only one subnet below is the current configuration

option domain-name "scc-dv.com";
option domain-name-servers 10.10.8.10;
option subnet-mask 255.255.255.0;

default-lease-time 600;
max-lease-time 72400;
ddns-update-style interim;

subnet 10.10.1.0 netmask 255.255.255.0 {

range 10.10.1.10 10.10.1.250;

option routers 10.10.1.1;

}

DHCP SERVER IP is 10.10.1.6

Now i got requirement to configure other subnets.

a.Below are the subnets, netmask and gateway ip that as to add in our dhcp server

1. 10.10.2.0, 255.255.255.0, 10.10.2.1
2. 10.10.3.0, 255.255.255.0, 10.10.3.1
3. 10.64.100.0, 255.255.255.0, 10.64.100.1
4. 10.106.80.0, 255.255.255.0, 10.106.80.1

b. ddns-update-style interim; is not updating IP's and computer names to our DNS server.

Linux guru's Please help on above a and b.

Thanks in advance.

DHCP is a layer 2 protocol, so it will not traverse a router (layer 3). To serve multiple subnets you need to have multiple interfaces, one on each subnet.

Hi Smallpond,

Thanks for your answer

I understand in my requirement each subnet need each interface

Can any thing do in networking to allow all above subnets to 10.10.1.0.

You need access to those networks in order to do this.

You could try aliasing your nic, and see if that would work.

Hi Gawdly,
Can you please explain in detail. I dont know nic aliasing