Configuring an Internal DHCP Server Configuration File Parameters and Syntax
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 page 22-14
Configuration File Parameters and Syntax
The following table provides detailed information about the configuration file options and syntax 
specifications.
Option 
Code
dhcpd.conf 
Key-word
dhcpd.conf 
example
Data type
Default 
Value
Description
1 subnet-mask 
option 
subnet-mask 
255.255.0.0;
N/A Same as in 
Subnet 
Profile
Specifies the client’s subnet mask. If 
both the subnet mask and the router 
option are specified in a DHCP reply, 
the subnet mask option must be 
specified before the router option.
2 time-offset
option 
time-offset 
1000;
numeric_
signed
N/A Specifies the offset of the client's 
subnet (in seconds) from 
Coordinated Universal Time (also 
referred to as UTC). A positive offset 
indicates a location east of the zero 
meridian and a negative offset 
indicates allocation west of the zero 
meridian. For example, to enter a 
time offset for a client subnet located 
in the Eastern Standard Timezone (5 
hours west of the UTC zero 
meridian), enter -18000.
3routers
option
routers 
100.0.0.1;
N/A Same as in 
Subnet 
Profile
Lists the IP addresses for the routers 
for each client subnet defined. 
Routers should be listed in order of 
preference.
4time-server
option time-
server 
10.10.0.10;
N/A Same as in 
Subnet 
Profile
Specifies IP address of the RFC 868 
time server available to the client.
5 name-servers
option name-
servers 
10.10.0.100;
ip_address_
list
N/A Specifies IP address of the IEN-116 
name server available to the client.
6 domain-name-
servers
option domain-
name-servers 
10.10.0.30;
N/A Same as in 
Subnet 
Profile
Lists the DNS (STD 13, RFC 1035) 
name server IP address(es) available 
to the client. Servers should be listed 
in order of preference.
7 log-servers
option 
log-servers 
10.10.0.100;
ip_address_
list
N/A Specifies the IP address of the MIT-
LCS UDP log server available to the 
client.
8 cookie-servers
option cookie-
servers 
10.10.0.100;
ip_address_
list
N/A Specifies the IP address of the RFC 
865 cookie server available to the 
client.
9 lpr-servers
option lpr-
servers 
10.10.0.100;
ip_address_
list
N/A Specifies IP address of the line 
printer server available to the client.
10 impress-servers
option impress-
servers 
10.10.0.100;
ip_address_
list
N/A Specifies IP address of the Imagen 
Impress server available to the client.