DHCP leases issue

[Surya Teja]

Hi
I have configured the dhcp on my local environment  with the configuration
as
=================================
subnet 192.168.3.0 netmask 255.255.255.0 {
        pool {
                range 192.168.3.3 192.168.3.143;
        }
                default-lease-time 120;
                max-lease-time 120;
                option domain-name "example.com";
                option routers 192.168.3.1;
                option subnet-mask 255.255.255.0;
        }
But no client is able to get the IP and in the logs I can see:
DHCPDISCOVER from 84:EF:18:6A:89:DE via 192.168.3.11: network 192.168.3.0/24
:* no free leases*
DHCPDISCOVER from 00:FF:4A:81:D5:A5 via 192.168.3.16: network 192.168.3.0/24:
*no free leases*
But it is not possible and none of the client get the lease from the
specified network. I cross checked in the lease file also
[root at dhcpserver]# cat dhcpd.leases | grep 192.168.3 -A 10 -B 10
[root at dhcpserver]#
It doesn't shows any entry

Any help is appreciated thanks in advance
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