On 7/29/2010 3:36 PM, Lars Hecking wrote:
Do you know if you have to do anything special in the case where the primary server has been down for a while and is then brought back up? That is, does the backup automatically re-sync the database with the new leases that have been given out, or does it not have to?
Nope, it's all automatic - that's the point, after all :)
Check out the FAILOVER STARTUP section in dhcpd.conf(5).
OK, I can confirm it works. I had been putting off changing my dhcp service for years because the last time I changed it a lot of clients (back in Win95/98 days) didn't switch gracefully and the old dhcp server never had downtime. But, this time everything still seems happy and will accept the ack to continue a lease from either of the new failover servers.