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Accepted
johnf
Asked: 2013-03-15 07:34:25 +0800 CST

How can I configure isc dhcpd to provide option 150 for Cisco phones?

  • 772

Cisco phones use the proprietary option 150 to tell the phone what server to contact for configuration information.

How can I provide this option using the ISC DHCP server on Ubuntu?

dhcp

2 Answers

  1. Best Answer

    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.

    • 7

  2. It can be:

    option tftp-servers code 150 = array of ip-address;

    option tftp-servers 10.20.10.1, 10.20.11.1;

    • 2