Heritage Kayaks Heritage Series manual 140

140 DHCP Client Configuration

Ethernet encapsulation

Default TCP TTL

TCP keep-alive interval

TCP keep-alive data size

The following documentation, adapted from manual pages provided by the Internet Software Consortium, gives the format of allowed DHCP options which may be specified in the configuration file.

9.4.1 Option statements

DHCP option statements always start with the option keyword, followed by an option name, followed by option data. The option names and data formats are described below. It is not necessary to exhaustively specify all DHCP options - only those options which are needed by clients must be specified. Option data comes in a variety of formats, as follows:

The ip-addressdata type can be entered either as an explicit IP address (e.g., 239.254.197.10) or as a domain name (e.g. haagen.isc.org). When entering a domain name, be sure that that domain name resolves to a single IP address.

The int32 data type specifies a signed 32-bit integer. The uint32 data type specifies an unsigned 32-bit integer. The int16 and uint16 data types specify signed and unsigned 16-bit integers. The int8 and uint8 data types specify signed and unsigned 8-bit integers. Unsigned 8-bit integers are also sometimes referred to as octets.

The string data type specifies an NVT ASCII string, which must be enclosed in double quotes –for example, to specify a domain-name option, the syntax would be

option domain-name "isc.org";

The flag data type specifies a Boolean value. Booleans may take the value 1 (true) or 0 (false).

The data-stringdata type specifies either an NVT ASCII string enclosed in double quotes, or a

series of octets specified in hexadecimal, separated by colons. For example:

option client-identifier "CLIENT-FOO";

option client-identifier 43:4c:49:45:54:2d:46:4f:4f;

The documentation for the various options mentioned below is taken from the latest IETF draft document on DHCP options. Options which are not listed by name may be defined by the name option-nnn, where nnn is the decimal number of the option code. These options may be followed either by a string, enclosed in quotes, or by a series of octets, expressed as