[求助]关于DHCP的问题

arch

--------------------- dhcpd Begin ------------------------

Unknown Entries:
If this DHCP server is authoritative for that subnet,: 1 Time(s)
Unable to add forward map from TANZO-4A6F5BB75.dhcp.arch.org to 192.168.1.101: timed out: 2 Time(s)
Unable to add forward map from TANZO-C948C2A80.dhcp.arch.org to 192.168.1.104: timed out: 1 Time(s)
Unable to add forward map from pp-dbf3157c2203.dhcp.arch.org to 192.168.1.149: timed out: 3 Time(s)
Unable to add forward map from sf-7873af90b63e.dhcp.arch.org to 192.168.1.143: timed out: 5 Time(s)
of the dhcpd.conf file.: 1 Time(s)
please write an `authoritative;' directive either in the: 1 Time(s)
subnet declaration - for example, write it at the top: 1 Time(s)
subnet declaration or in some scope that encloses the: 1 Time(s)


---------------------- dhcpd End -------------------------

谁帮我看一下，上面说的主要是啥意思？