TFTP option 150 for VoIP Phone in dhcpd.conf on Linux

Josh Myner jmyner at
Mon Dec 13 00:33:53 UTC 2004

  Since I'm not able to reply to the archived posts from earlier this
year when people were asking how to do this, here is a quick config for
anyone doing a websearch now or in the future. This is an example of how
to use a linux dhcpd DHCP server to hand out ip address leases and
specify the TFTP option 150 for VoIP phones in the dhcpd.conf config

# /etc/dhcpd.conf

ddns-update-style interim;
ignore client-updates;

# Define Custom Options
option option-150 code 150 = ip-address;

# Global Config

option ip-forwarding off;
option nis-domain               "domain.local";
option domain-name              "domain.local";
default-lease-time 21600;
max-lease-time 43200;

subnet netmask {

	option routers; 	   	#
Default Gateway
	option subnet-mask;
	option broadcast-address;
	option domain-name-servers;
	option nntp-server;
	option time-offset		-18000;			#
Eastern Standard Time
	option option-150;
# TFTP Custom Option
# TFTP Boot

	range dynamic-bootp;



Josh Myner : Systems Engineer
NETech :

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