~16, 000 backup leases added to dhcpd.leases when implementing failover

Mark Wagner mark at lanfear.net
Wed Sep 17 17:35:13 UTC 2014

When converting a single dhcp server to a failover configuration a large
number backup leases were added to dhcpd.leases.

Here is the config:

subnet netmask {
  filename "/pxelinux.0";
  option subnet-mask;
  option routers;
  pool {
    failover peer "dhcp-failover";

The leases start around and go to An example
lease is

 lease {
  starts 1 2014/09/15 23:06:08;
  tstp 1 2014/09/15 23:06:08;
  tsfp 1 2014/09/15 23:06:08;
  atsfp 1 2014/09/15 23:06:08;
  binding state backup;

Is this normal? It didn't seem to happen for other subnets.

How can I safely remove these leases?

Mark Wagner <mark at lanfear.net>
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