To configure vendor specific information on Linux DHCP Server

This article will to explain how to configure the vendor specific information i.e., option 43 on Linux DHCP Server, maybe I'll use this function in the future.

Step1. To open and modify /etc/dhcpd.conf

1 ddns-update-style interim;

2 ignore client-updates;

3 option opt-43 code 43 = ip-address;

4

5 subnet 192.168.1.0 netmask 255.255.255.0 {

6

7 # --- default gateway

8 option routers 192.168.1.1;

9 option subnet-mask 255.255.255.0;

10

11 option nis-domain "domain.org";

12 option domain-name "domain.org";

13 option domain-name-servers 192.168.1.1;

14

15 option time-offset -18000; # Eastern Standard Time

16 # option ntp-servers 192.168.1.1;

17 # option netbios-name-servers 192.168.1.1;

18 # --- Selects point-to-point node (default is hybrid). Don't change this unless

19 # -- you understand Netbios very well

20 # option netbios-node-type 2;

21

22 range dynamic-bootp 192.168.1.128 192.168.1.254;

23 default-lease-time 21600;

24 max-lease-time 43200;

25 option opt-43 = "192.168.1.100";

26

27 # we want the nameserver to appear at a fixed address

28 #host ns {

29 # next-server marvin.redhat.com;

30 # hardware ethernet 12:34:56:78:AB:CD;

31 # fixed-address 207.175.42.254;

32 #}

33 }

Step 2. Restart DHCP Server:

# /etc/init.d/dhcpd restart

# chkconfig dhcpd on

Step 3. Identify via packets record tool: