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[Julie Xu]

Hi

I have subnet configuration like:


    subnet 10.1.72.0 netmask 255.255.255.0 {
        option routers 10.1.72.1;
        option broadcast-address 10.1.72.255;
        pool {
            range 137.154.72.10 10.1.72.19;
        }
        pool {
            range 137.154.72.100 10.1.72.254;
        }
    }

Host host1 ........fixed-address 10.1.72.88
......

Currently I have problem, time by time, the dhcp assigned a ip address to the PC use dhcp service, and the ip address is actually existed for some other reasons.

Do some research on web, and I believe I should put "ping-check true;" option in. 
Please confirm is it a correct way to fix ip conflict problem?

If so, 
	1. what will happen if a host with reserve ip (host1, it maybe a printer) required ip address (10.1.72.88) is pingable by reason of itself alive? And what will happened if another machine use the ip and pingable?
	2. is the ping-check option can use in subnet? Or even used in pool only?

Any comments will be appreciated

Thanks in advance

Julie