DHCP Failover recovery......

Luis Fernando Lacayo lflacayo at cps.k12.il.us
Thu Jul 31 19:23:50 UTC 2008




a few weeks ago I posted a message about a problem that I 
encountered.  I had a two server dhcp redundant/failover setup and I 
deleted the dhcp.leases(~) files as I did not have enough room to 
save them. ( I know a very stupid thing to do. no excuses).

I have been running on a single (with none failover) dhcp server and 
want to return to a two server configuration. I am not doing DDNS, 
so I don't have to worry about that now.  The problem is that when I 
restart both servers they STOP offering IP addresses, and I see a 
lot of recovering messages on the logs.


When I start the servers, the logs show the following:Jul 28 07:56:36
D4FWWC1 dhcpd: Sending on   LPF/eth0/00:15:c5:fe:57:bd/10.129.177/24
Jul 28 07:56:36 D4FWWC1 dhcpd: Listening on
LPF/eth0/00:15:c5:fe:57:bd/10.129.177/24
Jul 28 07:56:36 D4FWWC1 dhcpd: Sending on   Socket/fallback/fallback-net
Jul 28 07:56:36 D4FWWC1 dhcpd: Sending on
LPF/eth0/00:15:c5:fe:57:bd/10.129.177/24
Jul 28 07:56:36 D4FWWC1 dhcpd: failover peer co-wan03: I move from
recover to startup
Jul 28 07:56:36 D4FWWC1 dhcpd: Sending on   Socket/fallback/fallback-net
Jul 28 07:56:37 D4FWWC1 dhcpd: failover peer co-wan03: I move from
recover to startup
Jul 28 07:56:37 D4FWWC1 dhcpd: dhcpd startup succeeded

skip a few lines and I see the same message for most of the subnets on
the dhcpd.conf file.


DHCPREQUEST for 10.129.77.204 from 00:12:3f:08:0d:e3 via 10.129.76.3: not responding (recovering).

Thanks, 

Luis




-- 
Luis Fernando Lacayo
Chicago Public Schools
Senior Unix Administrator
ITS/ UNIX Infrastructure
Office: 773-553-3835
Cell: 773-203-4493
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