dhcp on other network

nimnull22 · 12-12-2009, 03:50 PM

Check your config file:

subnet yyy.yyy.yyy.0 netmask 255.255.255.0
...

group {
option subnet-mask 255.255.255.0;
option routers yyy.yyy.yyy.1;
next-server yyy.yyy.yyy.1;
filename = "pxelinux.0";

host node001 {
hardware ethernet 00:0e:a6:51:8d:75;
fixed-address yyy.yyy.yyy.2;
# option host-name "node001";
}
host node002 {
hardware ethernet 00:0e:a6:5a:e1:67;
fixed-address yyy.yyy.yyy.3;
# option host-name "node002";

icegood · 12-12-2009, 04:07 PM

so what?
What is wrong? Everything is right. Group keyword is totally outside of both subnet keywords. If it would be even inside one of them then after starting DHCP claims you:
"host will be moved outside of subnet" or smth. like that

nimnull22 · 12-12-2009, 04:09 PM

subnet yyy.yyy.yyy.0 netmask 255.255.255.0

fixed-address yyy.yyy.yyy.2;
fixed-address yyy.yyy.yyy.3;

you give fixed address for|in|from the same subnetwork.

icegood · 12-12-2009, 04:15 PM

right. That's should be so. Read subnet carefully for what subnet keyword exists in dhcp.conf. Not only for ranges.

nimnull22 · 12-12-2009, 04:19 PM

But your second ethernet card is looking at the same subnet or at the different?

What is IP for eth0 and eth1?

icegood · 12-12-2009, 04:25 PM

IP for eth0 is x-network. (BIG)
IP for eth1 is y-network.
So what?

nimnull22 · 12-12-2009, 04:28 PM

DHCP gives IP fixed-address yyy.yyy.yyy.2 and fixed-address yyy.yyy.yyy.N - because they are in subnet yyy.yyy.yyy.0 netmask 255.255.255.0

icegood · 12-12-2009, 04:34 PM

No. You are wrong. If no range or pool keyword under subnet keyword - no addresses is leased because only of presence of subnet keyword. Only additional parameters (and options) are overwrited if new lease has ip/netmask from such subnet. At least should be so.

nimnull22 · 12-12-2009, 04:39 PM

As you wish.

icegood · 12-12-2009, 04:49 PM

Think logically. If it would be so then my config would not work even for clients accessible via eth1 as well. By same rreason. But for them works. Do not work just for clients accessible via eth0.

icegood · 12-12-2009, 05:05 PM

Code:

|---|old client's|----|
|                     |
eth1                  | 
|                     |
|---|      |----------|
    |server|
|---|      |----------|
|                     |
eth0              |router to somewhere outside|
|                     |
|---|new client|------|