Dhcp
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In order to provide option 150 (or other custom options) two configuration entries are required, first, in the top level of the configuration file located at /etc/dhcp/dhcpd.conf you need to define your custom option:
option voip-tftp-server code 150 = { ip-address };
Then, in the subnet stanza for where you need to provide the information you'll configure the option with the appropriate value.
subnet 192.168.0.0 netmask 255.255.255.0 { [...] option voip-tftp-server 10.101.0.10; }
If you place the option definition in the subnet stanza then dhcpd will not work. shareimprove this answer
edited Mar 14 '13 at 18:58
answered Mar 14 '13 at 17:09 johnf 629410
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It can be:
option tftp-servers code 150 = array of ip-address;
option tftp-servers 10.20.10.1, 10.20.11.1; shareimprove this answer
http://www.redhat.com/archives/redhat-list/2004-December/msg00272.html
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 file.
# /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 192.168.117.0 netmask 255.255.255.0 {
option routers 192.168.0.1; #
Default Gateway
option subnet-mask 255.255.255.0; option broadcast-address 192.168.0.255; option domain-name-servers 192.168.0.10; option nntp-server 192.168.0.10; option time-offset -18000; #
Eastern Standard Time
option option-150 192.168.200.10;
# TFTP Custom Option
next-server 192.168.200.10;
# TFTP Boot
range dynamic-bootp 192.168.0.200 192.168.0.249;
}