Problem with DHCP lease getting full

[Suhas!]

Hi all,

We have DHCP server running on RHEL AS 4. Currently we are facing problem like, the DHCP scope gets full for one Subnet, but in practice when we scan for live IP addresses, there seems only about 70% IP addresses in use.

We have scope 10.8.117.41 - 10.8.117.254

We have looked in the dhcpd.leases file and we have observed that one single host occupies more than one IP addresses, which status is active for all IP addressess.

e.g.

lease 10.8.81.54 {
starts 4 2007/08/30 04:12:34;
ends 0 2007/09/02 04:12:34;
tstp 0 2007/09/02 04:12:34;
binding state active;
next binding state free;
hardware ethernet 00:50:8d:45:01:a1;
uid "\001\000P\215E\001\241";
client-hostname "computer1";
}

lease 10.8.81.219 {
starts 4 2007/08/30 04:16:26;
ends 0 2007/09/02 04:16:26;
tstp 0 2007/09/02 04:16:26;
binding state active;
next binding state free;
hardware ethernet 00:50:8d:45:01:a1;
uid "\001RAS \000P\215E\001\241\000\000\001\000\000\000";
client-hostname "computer1";
}


Above is an example of one host having Hardware address 00:50:8d:45:01:a1 registering more than one IP. There are many such examples of hosts having more than one IP active against their Mac address.

What I have observed that for every lease entry in a lease file, everytime there is a different uid. I really dont know what is uid, why is it changing everytime and how can I configure my server to ignore it and assign a single IP per MAC for any host?


Kindly help me...

[eepks]

Try shorting the time of the lease.