dhcpcd-discuss

Hi, I'm running dhcpcd 3.2.3 as included in the 32 bit openSUSE 12.1 
Linux distribution.  The dhcpcd daemon ran perfectly until I 
unplugged the PC from a 10.0.0/24 subnetwork and plugged it into a 
10.218.0/24 network.  The dhcpcd daemon now seems to be permanently 
stuck on its old lease.

The DHCP server is a TP-Link WR1043ND wireless router and it is 
running.  I pulled the ethernet cable from the openSUSE box and 
pushed it into a Windows XP laptop.  The laptop received two IP 
addresses in 10.218.0/24, one for the cable and the other for the 
wireless card.

The dhcpcd daemon is running, command "ps aux | grep dhcpcd" reports

 root 1451 0.0 0.0 2096 764 ? S 00:07 0:00 /sbin/dhcpcd --netconfig -L -E -c /etc/sysconfig/network/scripts/dhcpcd-hook -t 0 -h sandrane eth0

In file /var/log/messages I get the following message every 20 seconds

 Apr  5 00:10:24 sandrane dhcpcd[1451]: eth0: timed out
 Apr  5 00:10:24 sandrane dhcpcd[1451]: eth0: trying to use old lease in `/var/lib/dhcpcd/dhcpcd-eth0.info'
 Apr  5 00:10:24 sandrane dhcpcd[1451]: eth0: broadcasting for a lease

I tried with the openSUSE system administration software YaST to 
delete and then redefine eth0 but no change.  I tried to stop eth0 
with the Linux command "ifconfig eth0 down" and then reboot, but no 
change.

File /var/lib/dhcpcd/dhcpcd-eth0.info contains

 INTERFACE='eth0'
 CLASSID='dhcpcd 3.2.3'
 CLIENTID='01:00:14:6c:8e:23:d0'
 DHCPCHADDR='00:14:6c:8e:23:d0'

I tried replacing eth0 with another network card.  The command "ps 
aux | grep dhcpcd" now reports

 root  7149 0.0 0.0 2096 656 ? S 10:46 0:00 /sbin/dhcpcd --netconfig -L -E -c /etc/sysconfig/network/scripts/dhcpcd-hook -t 0 -h sandrane eth_s2_0

and I get the following message in /var/log/messages every 20 seconds:

 Apr  5 10:47:05 sandrane dhcpcd[7149]: eth_s2_0: timed out
 Apr  5 10:47:05 sandrane dhcpcd[7149]: eth_s2_0: trying to use old lease in `/var/lib/dhcpcd/dhcpcd-eth_s2_0.info'
 Apr  5 10:47:05 sandrane dhcpcd[7149]: eth_s2_0: lease information file `/var/lib/dhcpcd/dhcpcd-eth_s2_0.info' does not exist
 Apr  5 10:47:05 sandrane dhcpcd[7149]: eth_s2_0: broadcasting for a lease

I tried the dhcpcd -n and -k options, but to no effect.

I looked at client.c, but my C programming skills are poor and I'm 
not clear about what is happening.  What is causing dhcpcd to insist 
on trying to use an old lease?

Is there some way of getting dhcpcd to re-initialize and try for a 
new lease?

Roger