Authoritative use.

Keith Woodworth kwoody at
Thu Oct 12 19:51:24 UTC 2006

Is the use of Authoritative a required command to use in a subnet

subnet netmask {
        option domain-name-servers,;
        option broadcast-address;
        option routers;
        max-lease-time 604800;
        default-lease-time 604800;

I'm cutting over and moving two old dhcp servers into one. I have about 8
networks on one and 4 on another.

On the above network I have set the lease time the old server hands out to
clients to 30 mins. I'm going to change the helper address on the switch
to the new server. Should I just comment out the subnet and restart dhcpd
on the old server after that so the old server does not even answer for
that subnet any longer?

I was going to do this for all the networks. One at a time lower the lease
time on the subnet, change the dhcp relay (ip-helper) address on the
approprate vlan and just comment out the subnet on the old server and let
the new one take over. Will this work ok?

In the DHCP hand book it says to copy over all the config files, including
the lease file too I'm guessing, but that wont work here as I have two
lease files from two different servers, running two different versions of
DHCP, each serving multpile networks. Acutally one DHCP server is running
Netreg too, as will the new one.


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