ddns update probs

[saravanan ganapathy]

Hai,
  
I am using dhcp & dyn.dns(bind) in my network and
everything works fine, except the following issue.

some of my mobile systems roaming around the networks
and due to some reasons,those are not properly send
the release request when changing the network. Ex. a
notebook has ip address of 192.168.110.100 and changed
to 192.168.112.133. But my dns still shows
192.168.10.100 only. my dhcp log shows as follows


Jan  7 09:52:21 dhcp dhcpd: if IN A note1.abc.com
domain doesn't exist add 302400 IN A note1.abc.com
192.168.112.133 add 302400 IN TXT note1.abc.com
"31f0ea946091a19ad6167e1fb29ca6272d": domain already
exists.
Jan  7 09:52:21 dhcp dhcpd: if IN TXT note1.abc.com
"31f0ea946091a19ad6167e1fb29ca6272d" rrset exists
delete IN A note1.abc.com add 302400 IN A
note1.abc.com 192.168.112.133: no such RRset.

I know that this is due to the existence of rr sets of
note1.abc.com as 192.168.110.100. 

Is there any possibility to overwrite the existing
rrsets? or any other solution for this?

Sarav



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