dhcpd lease problems?

[Andrew C. Dingman]

Yes, you need to allocate static assignments from a separate set than
you use for dynamic assignments.

On Tue, 2006-06-06 at 13:34 +0300, Kim Halavakoski wrote:
> Hello,
> I am running a DHCP server for a /24 network and have some problems  
> with IP-addres conflicts and started wondering if I have made a  
> mistake in my dhcp.conf configuration.
> We are running both static and dynamic addresses and the static hosts  
> have been declared with a host declaration and dynamic addresses are  
> assigned from a pool like the following configuration:
> 
> subnet 10.0.0.0 netmask 255.255.255.0 {
> 	option subnet-mask 255.255.255.0;
> 	option domain-name-servers 10.0.0.10,10.0.0.11;
> 	option domain-name "example.com";
> 	option routers 10.0.0.1;
> 
> 	pool {
> 		failover peer "dhcp-peer";
> 		deny dynamic bootp clients;
> 		default lease time 3600;
> 		max-lease-time 85400;
> 		range 10.0.0.20 10.0.0.254;
> 	}
> 
> host hostname1 {
> 	hardware ethernet 00:0f:1f:87:45:79;
> 	fixed-address 10.0.0.45;
> }
> 
> host hostname2 {
> 	hardware ethernet 00:0f:1f:87:45:79;
> 	fixed-address 10.0.0.88;
> }
> 
> and so forth...
> 
> If a need arises for static address for a host I have just added a  
> host declaration for that host and MAC to the dhcp.conf.
> Now it seems like dhcpd is giving out leases from the range  
> 10.0.0.20-10.0.0.254 and sometimes assigns even the IP-addresses that  
> I have put in as host declarations for the static hosts...
> 
> How is this supposed to work? Should dhcpd be able to see that it   
> doesn't assing out a dynamic address from the range configured IF  
> there is a host declaration for that IP? Or should I try to change  
> the pool range to 10.0.0.100 10.0.0.254 and then assign the host  
> declarations between 10.0.0.20 - 10.0.0.99?
> 
> I have read the manuals and HOWTOs but I cannot find anywhere where  
> it says how this is handled, should dynamic and static addressa  
> allocation IPs be in separate pools or not? Examples usually have  
> them separated but  thats the only indication I have found..
> 
> 
> Appreciate any help,
> Kim Halavakoski
> 
> 
-- 
Andrew C. Dingman
Unix Administrator
Cook
(812)339-2235 x2131
adingman at cookgroup.com