DHCP Failover -- Proper method for adding pools to an existing setup.

Cory Meyer cory.meyer at gmail.com
Wed Aug 29 17:08:28 UTC 2007

Does anyone have any methods or examples of the proper way to add additional
pools to a currently running  failover setup?
In my test setup I have 2 Debian Sarge servers both running 3.0.5.

The current method that I'm testing is:

1.  Update dhcp configuration with the new pool info.
2.  Test ( /usr/sbin/dhcpd -t -cf /etc/dhcp/dhcpd.conf )
  * Continue if configuration passed.
3.  Via OMAPI put the secondary dhcp server into shutdown mode
4.  Kill dhcpd process since the shutdown mode didn't actually kill the
5.  Restart dhcpd on the primary server,   primary moves from startup to
6.  copy pools configuration from primary to secondary.
7.  Clean out leases on secondary (cat /dev/null > /var/state/dhcpd.leases)
   * Above is required to remove the shutdown state.
8.  Start dhcpd process on secondary.
9.  Secondary moves from startup to recover.


More information about the dhcp-users mailing list