ancient backup entries in dhcpd.leases and duplicate messages in syslog

Randall C Grimshaw rgrimsha at
Mon Feb 4 19:59:43 UTC 2008

The question is whether this has been seen and fixed in 3.10 

There are multiple sources of 'duplicate on' messages that we would like
to identify. This observed source has little impact other than noise
that hinders our tracking of other issues.

The example below shows a system that was once given a dynamic address but has since been given a static address of

The original address remains forever in the peer dhcpd.leases file as a
backup and the server continually complains of a duplicate.

I would expect the server to age these out also. The current server pair
is Internet Systems Consortium DHCP Server V3.0.6



lease {

  starts 6 2007/08/25 19:43:24;

  ends 3 2007/08/08 17:54:15;

  tstp 3 2007/08/08 17:54:15;

  tsfp 6 2007/08/25 19:43:24;

  atsfp 6 2007/08/25 19:43:24;

  cltt 3 2007/08/08 17:53:48;

  binding state backup;

  hardware ethernet 00:11:22:33:44:55;

  uid "\001\000\013l/\215\346";




Feb  4 08:29:04 server2/server2 dhcpd: [ID 702911] DHCPACK
on to 00:11:22:33:44:55 via

Feb  4 08:30:50 server2/server2 dhcpd: [ID 702911 local3.error] uid
lease for client 00:11:22:33:44:55 is duplicate on


Thank you.

Randy Grimshaw

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