one ethernet get more than one ip address

[Julie Xu]

expert
 
I have found for some reason, one ethernet address may get more than one ip address in my dynomic range, something like 2-6 ip addresses.
 
how can I stop it, so one ethernet address go to special subnet, can only get one ip address, no more.
 
my configuration is:
 
subnet 10.1.111.0 netmask 255.255.255.0 {
     option routers 10.1.111.1;
     option broadcast-address 10.1.111.255'
     pool {
          failover peer "test"
          range 10.1.111.10 10.1.111.254
          dyney dynamic bootp clients;
     }
 
 
Any comments will be appreciated
 
Thanks in advance
 
xll           		 	   		  
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