two servers: dhcp priority

[Asmo Koskinen]

Uwe Geercken kirjoitti:
> as you are talking about dhcp. when you have two dhcp servers in one 
> network, which one is picked up first.
>

I got one system with two ltsp-servers (ubuntu 6.06+ltsp 4.2), both have 
dhcp3-server (failover/master/slave). On that network there are 113 HP 
t5125/5135 thin clients.

1. Network:
http://www.arkki.info/howto/Wiki/LTSP-Valokuvat/LTSP-Mantykangas.png

2. Master server:
http://www.arkki.info/howto/Wiki/LTSP-Mantykangas/dhcpd.conf-master.txt

3. Slave server:
http://www.arkki.info/howto/Wiki/LTSP-Mantykangas/dhcpd.conf-slave.txt

4. All conf-files for that system:
http://www.arkki.info/howto/Wiki/LTSP-Mantykangas/

5. Wiki page in finnish:
http://wiki.ubuntu-fi.org/Ubuntu_6.06_LTSP42

6. A classroom:

http://www.mantykankaankoulu.kokkola.fi/vme/tunninal/tunninal.html

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Then I got that other system for my own office, there is only one 
dhcp-server, Windows dhcp server.


So use only one Windows dhcp server on mixed network, setup in Windows 
server:

http://www.arkki.info/howto/Wiki/LTSP5_64/Edubuntu_Classroom_Server_7.10_x86_64_Windows_dhcpd.png

On linux-only network it is possible to use two dhcp servers with 
failover system.

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But I have not tried two Edubuntu Classroom Servers on same network as 
failover system. I think it should work same way as my Ubuntu 6.06 + 
ltsp 4.2 system. There is something for that:

https://wiki.edubuntu.org/EdubuntuDHCPload-balancingFailover


Best Regards Asmo Koskinen.