How to Customize DHCP Server Performance Options (Command Line)

If you change options with this procedure, the changed options affect only the current server session. If the DHCP server system reboots, the DHCP server starts with the settings specified during server configuration. If you want settings to apply to all future sessions, you must make changes using DHCP Manager.

1. Become superuser on the DHCP server system.

2. Type the following command:

   # /etc/init.d/dhcp stop # /usr/lib/inet/in.dhcpd options

   where options are any of the following:
   -h relay-hops	Specifies the maximum number of relay agent hops that can occur before the daemon drops the DHCP/BOOTP datagram.
   -n	Disables automatic duplicate IP address detection. This is not recommended.
   -t dhcptab_rescan_interval	Specifies the interval in minutes that the DHCP server should use to schedule the automatic rereading of the dhcptab information.
   -o seconds	Specifies the number of seconds the DHCP server should cache the offers it has extended to discovering DHCP clients. The default setting is 10 seconds.

   For example, the following command sets the hop count to 2, disables duplicate IP address detection, sets the rescan interval to 30 minutes, and sets the offer time to 20 seconds.

   # /usr/lib/inet/in.dhcp -h 2 -n -t 30 -o 20