Problem with Register DHCP leases in DNS forwarder and DHCP failover

  • I have noticed a problem with the "Register DHCP leases in DNS forwarder" option when DHCP failover is enabled.  It doesn't always work.  This is with pfSense 1.2.2.

    I suspect that this may have something to do with the leases on the backup server not always being consistent with the primary, i.e. the hostname and status fields are often different on the two servers, but I have not attempted to figure out what is going wrong here.

    Has anyone else seen this?

  • As a followup to my own post, apparently the DNS forwarder (dnsmasq) does not work with a DHCP failover configuration.  In a DHCP failover configuration, both DHCP servers are actively issuing leases and dnsmasq only sees the leases issued by the local host.

    I do not see a solution to this problem.  In fact, the dnsmasq man page doesn't even seem to indicate that this mode of operation is possible (i.e. registering leases provided by a separate DHCP server process).