dhcpd не пишет dhcpd.leases

При старте dhcpd пишет в /var/db/dhcpd/dhcpd.leases

# All times in this file are in UTC (GMT), not your local timezone. This is
# not a bug, so please don't ask about it. There is no portable way to
# store leases in the local timezone, so please don't request this as a
# feature. If this is inconvenient or confusing to you, we sincerely
# apologize. Seriously, though - don't ask.
# The format of this file is documented in the dhcpd.leases(5) manual page.
# This lease file was written by isc-dhcp-V3.0.5


а при назначении ипа хосту сюда ничего не пишется, кто-нибудь знает как это можно поправить?

конииг:
ddns-update-style none;
default-lease-time 600;
#option domain-name-servers 10.20.0.1;

#serverfarm network
subnet 10.40.0.0 netmask 255.255.255.0 {
option routers 10.40.0.1;
host s1 {
hardware ethernet 00:0e:0c:4a:51:d5;
next-server 10.40.0.1;
fixed-address 10.40.0.102;
filename "pxeboot";
option root-path "/usr/home/farm";
}
}